1
|
Xu X, Liu Y, Feng W, Shen J. Strong evidence supports the use of estradiol therapy for the treatment of vaginal inflammation: a two-way Mendelian randomization study. Eur J Med Res 2024; 29:339. [PMID: 38890725 PMCID: PMC11186076 DOI: 10.1186/s40001-024-01914-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 05/31/2024] [Indexed: 06/20/2024] Open
Abstract
OBJECTIVE Nowadays, there has been limited Mendelian randomization (MR) research focusing on the causal relationship between estradiol and vaginitis. Therefore, this study conducted a two-way MR study to clarify the causal effect and related influencing factors between them. METHODS All genetic datasets were obtained using publicly available summary statistics based on individuals of European ancestry from the IEU GWAS database. MR analysis was performed using MR-Egger, weighted median (WM) and inverse variance weighted (IVW) methods to assess the causal relationship between exposure and outcome and to validate the findings by comprehensively evaluating the effects of pleiotropic effects and outliers. RESULTS MR analysis revealed no significant causal relationship between estradiol and vaginitis risk. There was a negative correlation between estradiol and age at menarche (IVW, OR: 0.9996, 95% CI: 0.9992-1.0000, P = 0.0295; WM, OR: 0.9995, 95% CI: 0.9993-0.9998, P = 0.0003), and there was a positive correlation between age at menarche and vaginitis (IVW, OR: 1.5108, 95% CI: 1.1474-2.0930, P = 0.0043; MR-Egger, OR: 2.5575, 95% CI: 1.7664-9.6580, P = 0.0013). Estradiol was negatively correlated with age at menopause (IVW, OR: 0.9872, 95% CI: 0.9786-0.9959, P = 0.0041). However, there was no causal relationship between age at menopause and vaginitis (P > 0.05). In addition, HPV E7 Type 16, HPV E7 Type 18, and Lactobacillus had no direct causal effects on estradiol and vaginitis (P > 0.05). Sensitivity analyses revealed no heterogeneity and horizontal pleiotropy. CONCLUSION When estrogen levels drop, it will lead to a later age of menarche, and a later age of menarche may increase the risk of vaginitis, highlighting that the longer the female reproductive tract receives estrogen stimulation, the stronger the defense ability is formed, and the prevalence of vaginitis is reduced. In conclusion, this study indirectly supports an association between reduced level of estrogen or short time of estrogen stimulation and increased risk of vaginitis.
Collapse
Affiliation(s)
- Xiaosheng Xu
- Department of Gynecology and Obstetrics, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medcine, 197 Ruijiner Road, Shanghai, 200003, China
| | - Yan Liu
- Department of Gynecology and Obstetrics, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medcine, 197 Ruijiner Road, Shanghai, 200003, China
| | - Weiwei Feng
- Department of Gynecology and Obstetrics, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medcine, 197 Ruijiner Road, Shanghai, 200003, China.
| | - Jian Shen
- Department of Gynecology and Obstetrics, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medcine, 197 Ruijiner Road, Shanghai, 200003, China.
| |
Collapse
|
2
|
Bassette E, Ducie JA. Endometrial Cancer in Reproductive-Aged Females: Etiology and Pathogenesis. Biomedicines 2024; 12:886. [PMID: 38672240 PMCID: PMC11047839 DOI: 10.3390/biomedicines12040886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 03/26/2024] [Accepted: 04/01/2024] [Indexed: 04/28/2024] Open
Abstract
Endometrial cancer is the most common gynecologic malignancy in developed countries, and the incidence is rising in premenopausal females. Type I EC is more common than Type II EC (80% vs. 20%) and is associated with a hyperestrogenic state. Estrogen unopposed by progesterone is considered to be the main driving factor in the pathogenesis of EC. Studies show that BMI > 30 kg/m2, prolonged duration of menses, nulliparity, presence of polycystic ovarian syndrome, and Lynch syndrome are the most common causes of EC in premenopausal women. Currently, there are no guidelines established to indicate premenopausal patients who should be screened. This review aims to synthesize current data on the etiology, risk factors, presentation, evaluation, and prognosis of endometrial cancer in this population.
Collapse
Affiliation(s)
- Emma Bassette
- Department of Obstetrics and Gynecology, Creighton University School of Medicine, Omaha, NE 68178, USA;
| | - Jennifer A. Ducie
- Methodist Gynecology Oncology, Nebraska Methodist Hospital, Omaha, NE 68114, USA
| |
Collapse
|
3
|
Katagiri R, Iwasaki M, Abe SK, Islam MR, Rahman MS, Saito E, Merritt MA, Choi JY, Shin A, Sawada N, Tamakoshi A, Koh WP, Sakata R, Tsuji I, Kim J, Nagata C, Park SK, Kweon SS, Shu XO, Gao YT, Tsugane S, Kimura T, Yuan JM, Kanemura S, Lu Y, Sugawara Y, Wada K, Shin MH, Ahsan H, Boffetta P, Chia KS, Matsuo K, Qiao YL, Rothman N, Zheng W, Inoue M, Kang D. Reproductive Factors and Endometrial Cancer Risk Among Women. JAMA Netw Open 2023; 6:e2332296. [PMID: 37669051 PMCID: PMC10481237 DOI: 10.1001/jamanetworkopen.2023.32296] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 07/28/2023] [Indexed: 09/06/2023] Open
Abstract
Importance Despite evidence of an association between reproductive factors and endometrial cancer risk, prospective studies have been conducted mainly in non-Asian countries. Objective To assess the association between reproductive factors, such as number of deliveries, age at menarche, or menopause, and endometrial cancer risk. Design, Setting, and Participants This cohort study used pooled individual data from 13 prospective cohort studies conducted between 1963 and 2014 in the Asia Cohort Consortium. Participants were Asian women. Data analysis was conducted from September 2019 to April 2023. Exposures Reproductive factors were assessed using a questionnaire in each cohort. Main Outcomes and Measures The main outcome was time to incidence of endometrial cancer. A Cox proportional hazards model was used to calculate hazard ratios (HRs) and 95% CIs. Results A total of 1005 endometrial cancer cases were detected among 332 625 women (mean [SD] age, 54.3 [10.4] years) during a mean (SD) of 16.5 (6.4) years of follow-up. Increasing number of deliveries was associated with a decreased endometrial cancer risk in a dose-response manner (≥5 deliveries vs nulliparous [reference]: HR, 0.37; 95% CI, 0.26-0.53; P for trend < .001). Compared with menarche at younger than 13 years, menarche at 17 years or older had an HR of 0.64 (95% CI, 0.48-0.86; P for trend < .001). Late menopause (age ≥55 years) showed an HR of 2.84 (95% CI, 1.78-4.55; P for trend < .001) compared with the youngest age category for menopause (<45 years). Age at first delivery, hormone therapy, and breastfeeding were not associated with endometrial cancer risk. Conclusions and Relevance This large pooled study of individual participant data found that late menarche, early menopause, and a higher number of deliveries were significantly associated with a lower risk of endometrial cancer. These convincing results from Asian prospective studies add to the growing body of evidence for the association between reproductive factors and endometrial cancer.
Collapse
Affiliation(s)
- Ryoko Katagiri
- Division of Cohort Research, National Cancer Center Institute for Cancer Control, Tokyo, Japan
- National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, Tokyo, Japan
| | - Motoki Iwasaki
- Division of Cohort Research, National Cancer Center Institute for Cancer Control, Tokyo, Japan
- Division of Epidemiology, National Cancer Center Institute for Cancer Control, Tokyo, Japan
| | - Sarah Krull Abe
- Division of Prevention, National Cancer Center Institute for Cancer Control, Tokyo, Japan
| | - Md. Rashedul Islam
- Division of Prevention, National Cancer Center Institute for Cancer Control, Tokyo, Japan
- Hitotsubashi Institute for Advanced Study, Hitotsubashi University, Tokyo, Japan
| | - Md. Shafiur Rahman
- Division of Prevention, National Cancer Center Institute for Cancer Control, Tokyo, Japan
- Research Center for Child Mental Development, Hamamatsu University School of Medicine, Shizuoka, Japan
| | - Eiko Saito
- Institute for Global Health Policy Research, National Center for Global Health and Medicine, Tokyo, Japan
| | - Melissa A. Merritt
- The Daffodil Centre, The University of Sydney, a joint venture with Cancer Council NSW, Sydney, New South Wales, Australia
| | - Ji-Yeob Choi
- Department of Biomedical Sciences, Seoul National University Graduate School, Seoul, Korea
| | - Aesun Shin
- Cancer Research Institute, Seoul National University, Seoul, Korea
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Norie Sawada
- Division of Cohort Research, National Cancer Center Institute for Cancer Control, Tokyo, Japan
| | - Akiko Tamakoshi
- Department of Public Health, Hokkaido University Faculty of Medicine, Sapporo, Japan
| | - Woon-Puay Koh
- Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Singapore Institute for Clinical Sciences, Agency for Science Technology and Research, Singapore
| | - Ritsu Sakata
- Radiation Effects Research Foundation, Hiroshima, Japan
| | - Ichiro Tsuji
- Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Jeongseon Kim
- Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, Korea
| | - Chisato Nagata
- Department of Epidemiology and Preventive Medicine, Gifu University Graduate School of Medicine, Gifu, Japan
| | - Sue K. Park
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Sun-Seog Kweon
- Department of Preventive Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - Xiao-Ou Shu
- Division of Epidemiology, Vanderbilt-Ingram Cancer Center, Vanderbilt Epidemiology Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Yu-Tang Gao
- Department of Epidemiology, Shanghai Cancer Institute, Shanghai, China
| | - Shoichiro Tsugane
- Division of Cohort Research, National Cancer Center Institute for Cancer Control, Tokyo, Japan
| | - Takashi Kimura
- Department of Public Health, Hokkaido University Faculty of Medicine, Sapporo, Japan
| | - Jian-Min Yuan
- Division of Cancer Control and Population Sciences, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, Pennsylvania
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Seiki Kanemura
- Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Yukai Lu
- Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Yumi Sugawara
- Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Keiko Wada
- Department of Epidemiology and Preventive Medicine, Gifu University Graduate School of Medicine, Gifu, Japan
| | - Min-Ho Shin
- Department of Preventive Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - Habibul Ahsan
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois
| | - Paolo Boffetta
- Stony Brook Cancer Center, Stony Brook University, Stony Brook, New York
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - Kee Seng Chia
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore
| | - Keitaro Matsuo
- Division Cancer Epidemiology and Prevention, Aichi Cancer Center Research Institute, Nagoya, Japan
- Department of Cancer Epidemiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - You-Lin Qiao
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Nathaniel Rothman
- Division of Cancer Epidemiology and Genetics, Occupational and Environmental Epidemiology Branch, National Cancer Institute, Bethesda, Maryland
| | - Wei Zheng
- Division of Epidemiology, Vanderbilt-Ingram Cancer Center, Vanderbilt Epidemiology Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Manami Inoue
- Division of Prevention, National Cancer Center Institute for Cancer Control, Tokyo, Japan
| | - Daehee Kang
- Seoul National University College of Medicine, Seoul, Korea
| |
Collapse
|
4
|
Minalt N, Caldwell A, Yedlicka GM, Joseph S, Robertson SE, Landrum LM, Peipert JF. Association between intrauterine device use and endometrial, cervical, and ovarian cancer: an expert review. Am J Obstet Gynecol 2023; 229:93-100. [PMID: 37001577 DOI: 10.1016/j.ajog.2023.03.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 03/10/2023] [Accepted: 03/26/2023] [Indexed: 03/31/2023]
Abstract
The intrauterine device is one of the most effective forms of contraception. Use of the intrauterine device has increased in the United States over the last 2 decades. Two formulations are commercially available in the United States: the levonorgestrel-releasing intrauterine device and the copper intrauterine device. The levonorgestrel intrauterine device releases progestin, causing endometrial suppression and cervical mucus thickening, whereas the primary mechanism of action of the copper intrauterine device is to create a local inflammatory response to prevent fertilization. Whereas the protective effects of combined hormonal contraception against ovarian and endometrial cancer, and of tubal sterilization against ovarian cancer are generally accepted, less is known about the effects of modern intrauterine devices on the development of gynecologic malignancies. The best evidence for a protective effect of intrauterine device use against cancer incidence pertains to levonorgestrel intrauterine devices and endometrial cancer, although studies suggest that both copper intrauterine devices and levonorgestrel intrauterine devices reduce endometrial cancer risk. This is supported by the proposed dual mechanisms of action including both endometrial suppression and a local inflammatory response. Studies on the relationship between intrauterine device use and ovarian cancer risk show conflicting results, although most data suggest reduced risk of ovarian cancer in intrauterine device users. The proposed biological mechanisms of ovarian cancer reduction (foreign-body inflammatory response, increased pH, antiestrogenic effect, ovulation suppression) vary by type of intrauterine device. Whereas it has been well established that use of copper intrauterine devices confers a lower risk of cervical intraepithelial neoplasms, the effect of levonorgestrel intrauterine device use on cervical cancer remains unclear. Older studies have linked its use to a higher incidence of cervical dysplasia, but more recent literature has found a decrease in cervical cancer with intrauterine device use. Various mechanisms of protection are postulated, including device-related inflammatory response in the endocervical canal and prostaglandin-mediated immunosurveillance. Overall, the available evidence suggests that both levonorgestrel intrauterine devices and copper intrauterine devices reduce gynecologic cancer risk. Whereas there is support for the reduction of endometrial cancer risk with hormonal and copper intrauterine device use, and reduction of cervical cancer risk with copper intrauterine device use, evidence in support of risk reduction with levonorgestrel intrauterine device use for cervical and ovarian cancers is less consistent.
Collapse
Affiliation(s)
- Nicole Minalt
- Department of Obstetrics & Gynecology, Indiana University School of Medicine, Indianapolis, IN
| | - Amy Caldwell
- Department of Obstetrics & Gynecology, Indiana University School of Medicine, Indianapolis, IN
| | - Grace M Yedlicka
- Department of Obstetrics & Gynecology, Indiana University School of Medicine, Indianapolis, IN
| | - Sophia Joseph
- Department of Obstetrics & Gynecology, Indiana University School of Medicine, Indianapolis, IN
| | - Sharon E Robertson
- Department of Obstetrics & Gynecology, Indiana University School of Medicine, Indianapolis, IN
| | - Lisa M Landrum
- Department of Obstetrics & Gynecology, Indiana University School of Medicine, Indianapolis, IN
| | - Jeffrey F Peipert
- Department of Obstetrics & Gynecology, Indiana University School of Medicine, Indianapolis, IN.
| |
Collapse
|
5
|
Risk factors for endometrial cancer in Black women. Cancer Causes Control 2022; 34:421-430. [PMID: 36418803 PMCID: PMC10106410 DOI: 10.1007/s10552-022-01653-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 11/07/2022] [Indexed: 11/26/2022]
Abstract
PURPOSE The incidence of endometrial cancer (EC) has been increasing faster among Black women than among other racial/ethnic groups in the United States. Although the mortality rate is nearly twice as high among Black than White women, there is a paucity of literature on risk factors for EC among Black women, particularly regarding menopausal hormone use and severe obesity. METHODS We pooled questionnaire data on 811 EC cases and 3,124 controls from eight studies with data on self-identified Black women (4 case-control and 4 cohort studies). We analyzed cohort studies as nested case-control studies with up to 4 controls selected per case. We used logistic regression to estimate multivariable-adjusted odds ratios (ORs) and 95% confidence intervals (CIs). RESULTS We observed a positive association between BMI and EC incidence (Ptrend < 0.0001) The OR comparing BMI ≥ 40 vs. < 25 kg/m2 was 3.92 (95% CI 2.91, 5.27). Abdominal obesity among those with BMI < 30 kg/m2 was not appreciably associated with EC risk (OR 1.21, 95% CI 0.74, 1.99). Associations of reproductive history with EC were similar to those observed in studies of White women. Long-term use of estrogen-only menopausal hormones was associated with an increased risk of EC (≥ 5 years vs. never use: OR 2.08, 95% CI: 1.06, 4.06). CONCLUSIONS Our results suggest that the associations of established risk factors with EC are similar between Black and White women. Other explanations, such as differences in the prevalence of known risk factors or previously unidentified risk factors likely underlie the recent increases in EC incidence among Black women.
Collapse
|
6
|
Lei M, Adambekov S, Edwards RP, Wang R, Yuan JM, Kalix E, Lopa S, Linkov F. Endometrial cancer risk factors in singapore chinese: A prospective cohort study. Ann Epidemiol 2022; 71:9-14. [DOI: 10.1016/j.annepidem.2022.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 01/06/2022] [Accepted: 04/08/2022] [Indexed: 11/16/2022]
|
7
|
Sievert LL, Huicochea-Gómez L, Cahuich-Campos D, Whitcomb BW, Brown DE. Age at menopause among rural and urban women in the state of Campeche, Mexico. Menopause 2021; 28:1358-1368. [PMID: 34854837 DOI: 10.1097/gme.0000000000001886] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The purpose of this study was to examine age at natural menopause among women of Maya and non-Maya ancestry living in urban and rural communities in the state of Campeche, Mexico. METHODS Women ages 40 to 60 (n = 543) participated in semi-structured interviews and anthropometric measures. The last names, languages spoken, and the birthplace of the woman, her parents, and her grandparents were used to determine Maya or non-Maya ethnicity. Recalled age at natural menopause was compared across four communities; analysis of variance was used to compare means and Kaplan-Meier analyses were used to compare medians. Probit analysis was also used to estimate median ages at menopause. Cox regression analyses were applied to identify variables associated with age at menopause. RESULTS Mean recalled age at natural menopause across all sites was 46.7 years, ranging from 47.8 years in the city of Campeche to 43.9 years in the rural Maya communities in the municipality of Hopelchén. Median ages at menopause across all sites were 50.55 years by probit analysis and 50.5 years by Kaplan-Meier. Variables associated with a later age at menopause included higher socioeconomic status, higher parity, and a later age at menarche. CONCLUSIONS The early mean recalled age at menopause in southern Hopelchén was consistent with previous studies in the Yucatán peninsula. As expected, probit and Kaplan-Meier analyses demonstrated later ages at menopause. Contrary to our expectations, Maya/non-Maya ethnicity was not associated with age at menopause. Demographic and reproductive factors were more important than ethnicity in explaining variation in age at menopause within the state of Campeche, Mexico.
Collapse
Affiliation(s)
| | - Laura Huicochea-Gómez
- Departamento de Sociedad y Cultura, El Colegio de la Frontera, ECOSUR, Campeche, México
| | - Diana Cahuich-Campos
- Departamento de Sociedad y Cultura, El Colegio de la Frontera, ECOSUR, Campeche, México
| | - Brian W Whitcomb
- Department of Biostatistics and Epidemiology, UMass Amherst, Amherst, MA
| | - Daniel E Brown
- Department of Anthropology, University of Hawai'i at Hilo, Hilo, HI
| |
Collapse
|
8
|
Hutt S, Mihaies D, Karteris E, Michael A, Payne AM, Chatterjee J. Statistical Meta-Analysis of Risk Factors for Endometrial Cancer and Development of a Risk Prediction Model Using an Artificial Neural Network Algorithm. Cancers (Basel) 2021; 13:cancers13153689. [PMID: 34359595 PMCID: PMC8345114 DOI: 10.3390/cancers13153689] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/05/2021] [Accepted: 07/09/2021] [Indexed: 11/16/2022] Open
Abstract
Simple Summary A robust and comprehensive meta-analysis, for the first time, identified definitely that BMI is by far the most influential risk factor in endometrial cancer. Risk factors were previously only studied individually and or in smaller meta-analysis studies which grouped some factors together. BMI was shown to be an important risk factor with other factors less so, but no rank order was established. This work also offers, for the first time, a neural network computer model to predict the overall increase or decreased risk of cancer for individual patients, which is 98.6% accurate. This prediction can be used as a tool to determine if a patient should be considered for testing and to predict diagnosis, as well as to suggest prevention measures to patients. Abstract Objectives: In this study we wished to determine the rank order of risk factors for endometrial cancer and calculate a pooled risk and percentage risk for each factor using a statistical meta-analysis approach. The next step was to design a neural network computer model to predict the overall increase or decreased risk of cancer for individual patients. This would help to determine whether this prediction could be used as a tool to decide if a patient should be considered for testing and to predict diagnosis, as well as to suggest prevention measures to patients. Design: A meta-analysis of existing data was carried out to calculate relative risk, followed by design and implementation of a risk prediction computational model based on a neural network algorithm. Setting: Meta-analysis data were collated from various settings from around the world. Primary data to test the model were collected from a hospital clinic setting. Participants: Data from 40 patients notes currently suspected of having endometrial cancer and undergoing investigations and treatment were collected to test the software with their cancer diagnosis not revealed to the software developers. Main outcome measures: The forest plots allowed an overall relative risk and percentage risk to be calculated from all the risk data gathered from the studies. A neural network computational model to determine percentage risk for individual patients was developed, implemented, and evaluated. Results: The results show that the greatest percentage increased risk was due to BMI being above 25, with the risk increasing as BMI increases. A BMI of 25 or over gave an increased risk of 2.01%, a BMI of 30 or over gave an increase of 5.24%, and a BMI of 40 or over led to an increase of 6.9%. PCOS was the second highest increased risk at 4.2%. Diabetes, which is incidentally also linked to an increased BMI, gave a significant increased risk along with null parity and noncontinuous HRT of 1.54%, 1.2%, and 0.56% respectively. Decreased risk due to contraception was greatest with IUD (intrauterine device) and IUPD (intrauterine progesterone device) at −1.34% compared to −0.9% with oral. Continuous HRT at −0.75% and parity at −0.9% also decreased the risk. Using open-source patient data to test our computational model to determine risk, our results showed that the model is 98.6% accurate with an algorithm sensitivity 75% on average. Conclusions: In this study, we successfully determined the rank order of risk factors for endometrial cancer and calculated a pooled risk and risk percentage for each factor using a statistical meta-analysis approach. Then, using a computer neural network model system, we were able to model the overall increase or decreased risk of cancer and predict the cancer diagnosis for particular patients to an accuracy of over 98%. The neural network model developed in this study was shown to be a potentially useful tool in determining the percentage risk and predicting the possibility of a given patient developing endometrial cancer. As such, it could be a useful tool for clinicians to use in conjunction with other biomarkers in determining which patients warrant further preventative interventions to avert progressing to endometrial cancer. This result would allow for a reduction in the number of unnecessary invasive tests on patients. The model may also be used to suggest interventions to decrease the risk for a particular patient. The sensitivity of the model limits it at this stage due to the small percentage of positive cases in the datasets; however, since this model utilizes a neural network machine learning algorithm, it can be further improved by providing the system with more and larger datasets to allow further refinement of the neural network.
Collapse
Affiliation(s)
- Suzanna Hutt
- Academic Department of Gynaecological Oncology, Royal Surrey NHS Foundation Trust Hospital, Guildford GU2 7XX, UK; (S.H.); (A.M.); (J.C.)
- Department of Clinical and Experimental Medicine, Faculty of Health and Medical Sciences, School of Biosciences and Medicine, University of Surrey, Guildford GU2 7XH, UK
| | - Denis Mihaies
- Department of Computer Science, College of Engineering, Design and Physical Sciences, Brunel University, London UB8 3PN, UK;
| | - Emmanouil Karteris
- Department of Life Sciences, Division of Biosciences, College of Health, Medicine and Life Sciences, Brunel University, London UB8 3PN, UK;
| | - Agnieszka Michael
- Academic Department of Gynaecological Oncology, Royal Surrey NHS Foundation Trust Hospital, Guildford GU2 7XX, UK; (S.H.); (A.M.); (J.C.)
| | - Annette M. Payne
- Department of Computer Science, College of Engineering, Design and Physical Sciences, Brunel University, London UB8 3PN, UK;
- Correspondence:
| | - Jayanta Chatterjee
- Academic Department of Gynaecological Oncology, Royal Surrey NHS Foundation Trust Hospital, Guildford GU2 7XX, UK; (S.H.); (A.M.); (J.C.)
- Department of Clinical and Experimental Medicine, Faculty of Health and Medical Sciences, School of Biosciences and Medicine, University of Surrey, Guildford GU2 7XH, UK
- Department of Cancer and Surgery, Imperial College London, London SW7 2BX, UK
| |
Collapse
|
9
|
Racial/ethnic differences in anthropometric and hormone-related factors and endometrial cancer risk: the Multiethnic Cohort Study. Br J Cancer 2021; 124:1724-1733. [PMID: 33723396 DOI: 10.1038/s41416-021-01292-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 01/20/2021] [Accepted: 01/29/2021] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Anthropometric and hormone-related factors are established endometrial cancer risk factors; however, little is known about the impact of these factors on endometrial cancer risk in non-White women. METHODS Among 110,712 women participating in the Multiethnic Cohort (MEC) Study, 1150 incident invasive endometrial cancers were diagnosed. Hazard ratios (HRs) and 95% confidence intervals (CIs) for associations with endometrial cancer risk for race/ethnicity and for risk factors across racial/ethnic groups were calculated. RESULTS Having a higher body mass index (BMI) at baseline or age 21 years was strongly associated with increased risk (pint race/ethnicity ≥ 0.36). Parity (vs nulliparity) was inversely associated with risk in all the groups except African Americans (pint 0.006). Current use of postmenopausal hormones at baseline (PMH-E; vs never use) was associated with increased risk in Whites and Japanese Americans (pint 0.002). Relative to Whites, endometrial cancer risk was lower in Japanese Americans and Latinas and non-significantly higher in Native Hawaiians. Risk in African Americans did not differ from that in Whites. CONCLUSIONS Racial/ethnic differences in endometrial cancer risk were not fully explained by anthropometric or hormone-related risk factors. Further studies are needed to identify reasons for the observed racial/ethnic differences in endometrial cancer risk.
Collapse
|
10
|
Loghmani L, Saedi N, Omani-Samani R, Safiri S, Sepidarkish M, Maroufizadeh S, Esmailzadeh A, Shokrpour M, Khedmati Morasae E, Almasi-Hashiani A. Tubal ligation and endometrial Cancer risk: a global systematic review and meta-analysis. BMC Cancer 2019; 19:942. [PMID: 31604465 PMCID: PMC6788032 DOI: 10.1186/s12885-019-6174-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 09/20/2019] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Studies on relationship between tubal ligation and endometrial cancer have led to contradictory findings. In several studies, however, a reduced endometrial cancer risk was suggested following tubal ligation. Therefore, a systematic review and meta-analysis was conducted to examine the relationship between tubal ligation and endometrial cancer risk. METHODS In this systematic review and meta-analysis, PubMed/Medline, Web of Science, Scopus, Embase, and Google Scholar were searched for relevant studies published up to May 30th, 2018. We compared endometrial cancer risk in women with and without tubal ligation in retrieved studies. RESULTS Two hundred nine studies were initially retrieved from the data bases. After exclusion of duplicates and studies which did not meet inclusion criteria, ten cohort and case-control studies, including 6,773,066 cases, were entered into the quantitative meta-analysis. There was 0.90% agreement between two researchers who searched and retrieved the studies. The summary OR (SOR) was reported using a random effect model. Begg's test suggested that there was no publication bias, but a considerable heterogeneity was observed (I2 = 95.4%, P = 0.001). We pooled the raw number of tables cells (i.e. a, b, c, and d) of eight studies. The SOR suggested that tubal ligation was significantly associated with a lower risk of endometrial cancer (SOR = 0.577, 95% CI = 0.420-0.792). Also, given the rare nature of endometrial cancer (< 5%), different effect sizes were considered as comparable measures of risk. Therefore we pooled ten studies and SOR of these studies revealed that tubal ligation was significantly associated with a lower risk of endometrial cancer (SOR = 0.696, 95% CI = 0.425-0.966). Besides that, we pooled eight studies in which adjusted effect sizes were reported and a subsequent analysis revealed that the summary estimate of adjusted odds ratio (SAOR) was significant (SAOR = 0.862, 95% CI = 0.698-1.026). CONCLUSIONS This study revealed a protective effect of tubal ligation on endometrial cancer risk (approximately 42% lower risk of cancer). It is recommended that studies should be designed to reveal mechanisms of this relationship.
Collapse
Affiliation(s)
- Laleh Loghmani
- Department of Nursing, Faculty of Nursing and Midwifery, Bam University of Medical Sciences, Bam, Iran
| | - Nafise Saedi
- Department of Gynecologic Oncology, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Omani-Samani
- Department of Medical Ethics and Law, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Saeid Safiri
- Aging Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Community Medicine, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mahdi Sepidarkish
- Department of Biostatistics and Epidemiology, Babol University of Medical Sciences, Babol, Iran
| | - Saman Maroufizadeh
- School of Nursing and Midwifery, Guilan University of Medical Sciences, Rasht, Iran
| | - Arezoo Esmailzadeh
- Department of Obstetrics and Gynecology, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Maryam Shokrpour
- Department of Obstetrics and Gynecology, Arak University of Medical Sciences, Arak, Iran
| | - Esmaeil Khedmati Morasae
- Institute of Psychology, Health, and Society, Department of Health Services Research, University of Liverpool, Liverpool, UK
| | - Amir Almasi-Hashiani
- Department of Epidemiology, School of Health, Arak University of Medical Sciences, Arak, Iran. .,Traditional and Complementary Medicine Research Center, Arak University of Medical Sciences, Arak, Iran.
| |
Collapse
|
11
|
Black A, Guilbert E. Consensus canadien sur la contraception (partie 3 de 4): chapitre 7 - Contraception intra-utérine. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2019; 41 Suppl 1:S1-S23. [DOI: 10.1016/j.jogc.2019.02.124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
12
|
Age at Menopause and Risk of Developing Endometrial Cancer: A Meta-Analysis. BIOMED RESEARCH INTERNATIONAL 2019; 2019:8584130. [PMID: 31275987 PMCID: PMC6560333 DOI: 10.1155/2019/8584130] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 04/16/2019] [Accepted: 05/08/2019] [Indexed: 12/23/2022]
Abstract
Object The association of age at menopause with endometrial cancer remains controversial. Therefore, we quantitatively summarized the evidence from observational studies with a meta-analysis. Methods We searched PubMed, Web of Science, Embase, Medline, Chinese National Knowledge Infrastructure (CNKI), and Wan Fang Med online up to March 2019, and all eligible case-control and cohort studies were included in the study. Pooled relative risks (RRs) with 95% confidence intervals (CIs) were calculated using the random-effects model. The dose-response relationship was assessed by restricted cubic spline model. The heterogeneity among studies was evaluated by I2. Metaregression was used to explore the potential sources of between-study heterogeneity. Egger's test was used to estimate publication bias. Results Eighteen articles including 957242 subjects with 4781 cases were included in the meta-analysis. The pooled RR (95%CI) of endometrial cancer for the highest versus the lowest age at menopause was 1.89 (95%CI: 1.58-2.26). For dose-response analysis, a nonlinear relationship was found between age at menopause and endometrial cancer, and the positive association became statistically significant when age at menopause was greater than 46.5 years old. Conclusions This meta-analysis suggested that age at menopause was positively associated with endometrial cancer. For women whose menopausal age over 46.5 years old, the risk of endometrial cancer increased with the age at menopause.
Collapse
|
13
|
Sugawara Y, Sugiyama K, Tomata Y, Kanemura S, Fukao A, Tsuji I. Age at First Birth and the Risk of Endometrial Cancer Incidence: A Pooled Analysis of Two Prospective Cohort Studies among Japanese Women. J Cancer 2018; 9:4422-4429. [PMID: 30519348 PMCID: PMC6277642 DOI: 10.7150/jca.26242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 08/26/2018] [Indexed: 01/06/2023] Open
Abstract
Background: Age at first birth has been increasing among women in developed countries. Meanwhile, endometrial cancer has also been increasing worldwide, being one of the most common female hormone-related cancers. The purpose of this study was to examine the association between age at first birth and the risk of endometrial cancer among Japanese women, and to examine the hypothesis that the recent increase in endometrial cancer incidence can be partly explained by the trend for increasing age at first birth. Methods: We conducted a pooled analysis of two prospective studies among residents in Miyagi Prefecture in rural northern in Japan. The Miyagi Cohort Study started in 1990 and included 21,455 parous women. The Ohsaki Cohort Study started in 1994 and included 17,287 parous women. The subjects responded to a self-administrated questionnaire including reproductive factors such as age at first birth. Incident cases of cancer were identified through linkage to the Miyagi Prefectural Cancer Registry, which covers the study area. Results: In a consortium of two prospective studies with 598,933 person-years, we identified 105 incident case of endometrial cancer. Compared with women aged 22 years or less at first birth, multivariate hazard ratios (HRs) and 95% confidence intervals (CIs) for the risk of endometrial cancer were 0.79 (0.49-1.26) for women aged 23 to 25 years at first birth, and 0.53 (0.28-1.00) for those aged 26 years and older (p-trend<0.05). Conclusion: This pooled analysis of two prospective studies does not support the hypothesis that the recent increase in the incidence of endometrial cancer can be partly explained by the increase in the age at first birth.
Collapse
Affiliation(s)
- Yumi Sugawara
- Division of Epidemiology, Department of Health Informatics and Public Health, Tohoku University School of Public Health, Graduate School of Medicine, Sendai, Japan
| | - Kemmyo Sugiyama
- Division of Epidemiology, Department of Health Informatics and Public Health, Tohoku University School of Public Health, Graduate School of Medicine, Sendai, Japan
| | - Yasutake Tomata
- Division of Epidemiology, Department of Health Informatics and Public Health, Tohoku University School of Public Health, Graduate School of Medicine, Sendai, Japan
| | - Seiki Kanemura
- Division of Cancer Epidemiology and Prevention, Miyagi Cancer Center Research Institute, Natori, Japan
| | - Akira Fukao
- Department of Public Health, Yamagata University Graduate School of Medicine, Yamagata, Japan
| | - Ichiro Tsuji
- Division of Epidemiology, Department of Health Informatics and Public Health, Tohoku University School of Public Health, Graduate School of Medicine, Sendai, Japan
| |
Collapse
|
14
|
Jiang X, Tang H, Chen T. Epidemiology of gynecologic cancers in China. J Gynecol Oncol 2018; 29:e7. [PMID: 29185265 PMCID: PMC5709533 DOI: 10.3802/jgo.2018.29.e7] [Citation(s) in RCA: 121] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 10/16/2017] [Indexed: 11/30/2022] Open
Abstract
Cancer has become a major disease burden across the globe. It was estimated that 4.29 million new incident cases and 2.81 million death cases of cancer would occur in 2015 in China, with the age-standardized incidence rate (ASIR) of 201.1 per 100,000 and age-standardized mortality rate (ASMR) of 126.9 per 100,000, respectively. For females, 2 of the top 10 most common types of cancer would be gynecologic cancers, with breast cancer being the most prevalent (268.6 thousand new incident cases) and cervical cancer being the 7th most common cancer (98.9 thousand new incident cases). The incidence and mortality of gynecologic cancers have been constantly increasing in China over last 2 decades, which become a major health concern for women. Survival rates of gynecologic cancers are generally not satisfactory and decrease along with advancing stage, though national data on survival are still not available. It is of great importance to overview on the epidemiology of gynecologic cancers, which may provide scientific clues for strategy-making of prevention and control, and eventually lowering the incidence and mortality rate as well as improving the survival rate in the future.
Collapse
Affiliation(s)
- Xiyi Jiang
- Group of Molecular Epidemiology & Cancer Precision Prevention (GMECPP), Institute of Occupational Diseases, Zhejiang Academy of Medical Sciences (ZJAMS), Hangzhou, China
| | - Huijuan Tang
- Group of Molecular Epidemiology & Cancer Precision Prevention (GMECPP), Institute of Occupational Diseases, Zhejiang Academy of Medical Sciences (ZJAMS), Hangzhou, China
| | - Tianhui Chen
- Group of Molecular Epidemiology & Cancer Precision Prevention (GMECPP), Institute of Occupational Diseases, Zhejiang Academy of Medical Sciences (ZJAMS), Hangzhou, China.,Department of Preventive Medicine, Ningbo University Medical School, Ningbo, China.
| |
Collapse
|
15
|
Gavrilyuk O, Braaten T, Weiderpass E, Licaj I, Lund E. Lifetime number of years of menstruation as a risk index for postmenopausal endometrial cancer in the Norwegian Women and Cancer Study. Acta Obstet Gynecol Scand 2018; 97:1168-1177. [PMID: 29782643 PMCID: PMC6175350 DOI: 10.1111/aogs.13381] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 05/02/2018] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Lifetime number of years of menstruation (LNYM) reflects a woman's cumulative exposure to endogenous estrogen and can be used as a measure of the combined effect of reproductive factors related to endometrial cancer (EC) risk. MATERIAL AND METHODS We aimed to study the association between LNYM and EC risk among postmenopausal women and calculate the population attributable fraction of EC for different LNYM categories. Our study sample consisted of 117 589 women from the Norwegian Women and Cancer (NOWAC) Study. All women were aged 30-70 years at enrollment and completed a baseline questionnaire between 1991 and 2006. Women were followed up for EC to December 2014 through linkages to national registries. We used Cox proportional hazards models to estimate hazard ratios with 95% confidence intervals (95% CIs), adjusted for potential confounders. RESULTS In all, 720 women developed EC. We found a statistically significant, positive dose-response relationship between LNYM and EC, with a 9.1% higher risk for each additional year of LNYM (P for trend < .001). Using the LNYM category ≥40 as a reference, the hazard ratios for LNYM <25, 25-29, 30-34, 35-39 were 0.17 (95% CI 0.22-0.27), 0.25 (95% CI 0.17-0.36), 0.43 (95% CI 0.32-0.58), and 0.68 (95% CI 0.51-0.92), respectively. The association between LNYM and EC was independent of incomplete pregnancies, menopausal hormone therapy, diabetes, and body mass index. When considering the population attributable fraction, 67% of EC was estimated to be attributable to LNYM ≥25 years. CONCLUSIONS Our study supports that increasing LNYM is an important and independent predictor of EC risk.
Collapse
Affiliation(s)
- Oxana Gavrilyuk
- Department of Community Medicine, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Tonje Braaten
- Department of Community Medicine, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Elisabete Weiderpass
- Department of Community Medicine, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway.,Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.,Department of Research, Cancer Registry of Norway, Institute of Population-Based Cancer Research, Oslo, Norway.,Genetic Epidemiology Group, Folkhälsan Research Center, and Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Idlir Licaj
- Department of Community Medicine, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Eiliv Lund
- Department of Community Medicine, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway.,Department of Research, Cancer Registry of Norway, Institute of Population-Based Cancer Research, Oslo, Norway
| |
Collapse
|
16
|
Association between breastfeeding and risk of endometrial cancer: a meta-analysis of epidemiological studies. Eur J Cancer Prev 2018; 27:144-151. [DOI: 10.1097/cej.0000000000000186] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
17
|
Sponholtz TR, Palmer JR, Rosenberg L, Hatch EE, Adams-Campbell LL, Wise LA. Reproductive factors and incidence of endometrial cancer in U.S. black women. Cancer Causes Control 2017; 28:579-588. [PMID: 28361447 DOI: 10.1007/s10552-017-0880-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 03/08/2017] [Indexed: 11/25/2022]
Abstract
PURPOSE Previous studies have shown that reproductive history is a strong determinant of endometrial cancer risk among white women. Less is known about how reproductive history affects endometrial cancer risk among black women, whose incidence and mortality differ from white women. We investigated the associations of age at menarche, parity, timing of births, and menopausal age with endometrial cancer in the Black Women's Health Study, a prospective cohort study. METHODS Every 2 years from 1995 to 2013, 47,555 participants with intact uteri at baseline in 1995 completed questionnaires on reproductive and medical history, and lifestyle factors. Self-reported cases of endometrial cancer were confirmed by medical record, cancer registry, or death certificate when available. Cox proportional hazards regression was used to estimate multivariable incidence rate ratios (IRR) and 95% confidence intervals (CI). RESULTS During 689,501 person-years of follow-up, we identified 300 incident cases of endometrial cancer. The strongest associations with endometrial cancer were found for early age at menarche (<11 vs. 12-13 years: IRR 1.82, 95% CI 1.31, 2.52), and later age at first birth (≥30 vs. <20 years: IRR 0.26, 95% CI 0.13, 0.50). Parous women were less likely than nulliparous women to develop endometrial cancer (IRR 0.77, 95% CI 0.57, 1.05), but there was little evidence of a dose-response relationship for number of births. CONCLUSION Associations between reproductive factors and endometrial cancer among black women were generally consistent with those in studies of white women.
Collapse
Affiliation(s)
- Todd R Sponholtz
- Section of Preventive Medicine and Epidemiology, Boston University School of Medicine, 801 Massachusetts Ave, Suite 470, Boston, MA, 02118, USA. .,Slone Epidemiology Center, Boston University, 72 East Concord Street, L-7, Boston, MA, 02118, USA.
| | - Julie R Palmer
- Slone Epidemiology Center, Boston University, 72 East Concord Street, L-7, Boston, MA, 02118, USA.,Department of Epidemiology, Boston University School of Public Health, 715 Albany Street, The Talbot Building, T2C, Boston, MA, 02118, USA
| | - Lynn Rosenberg
- Slone Epidemiology Center, Boston University, 72 East Concord Street, L-7, Boston, MA, 02118, USA.,Department of Epidemiology, Boston University School of Public Health, 715 Albany Street, The Talbot Building, T2C, Boston, MA, 02118, USA
| | - Elizabeth E Hatch
- Department of Epidemiology, Boston University School of Public Health, 715 Albany Street, The Talbot Building, T2C, Boston, MA, 02118, USA
| | - Lucile L Adams-Campbell
- Division of Cancer Prevention and Control, Georgetown-Lombardi Comprehensive Cancer Center, Georgetown University, 1000 New Jersey Ave SE, Washington, 20003, DC, USA
| | - Lauren A Wise
- Slone Epidemiology Center, Boston University, 72 East Concord Street, L-7, Boston, MA, 02118, USA.,Department of Epidemiology, Boston University School of Public Health, 715 Albany Street, The Talbot Building, T2C, Boston, MA, 02118, USA
| |
Collapse
|
18
|
Epidemiology of Endometrial Carcinoma: Etiologic Importance of Hormonal and Metabolic Influences. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 943:3-46. [PMID: 27910063 DOI: 10.1007/978-3-319-43139-0_1] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Endometrial carcinoma is the most common gynecologic cancer in developed nations, and the annual incidence is projected to increase, secondary to the high prevalence of obesity, a strong endometrial carcinoma risk factor. Although endometrial carcinomas are etiologically, biologically, and clinically diverse, hormonal and metabolic mechanisms are particularly strongly implicated in the pathogenesis of endometrioid carcinoma, the numerically predominant subtype. The centrality of hormonal and metabolic disturbances in the pathogenesis of endometrial carcinoma, combined with its slow development from well-characterized precursors in most cases, offers a substantial opportunity to reduce endometrial carcinoma mortality through early detection, lifestyle modification, and chemoprevention. In this chapter, we review the epidemiology of endometrial carcinoma, emphasizing theories that link risk factors for these tumors to hormonal and metabolic mechanisms. Future translational research opportunities related to prevention are discussed.
Collapse
|
19
|
Zhan B, Liu X, Li F, Zhang D. Breastfeeding and the incidence of endometrial cancer: A meta-analysis. Oncotarget 2016; 6:38398-409. [PMID: 26384296 PMCID: PMC4742008 DOI: 10.18632/oncotarget.5049] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 08/24/2015] [Indexed: 11/26/2022] Open
Abstract
Several epidemiological studies have investigated the association between breastfeeding and endometrial cancer (EC). However, the results of the studies are controversial. Thus, we conduct this meta-analysis to explore the association between breastfeeding and EC and to evaluate the possible does-response relationship between duration of breastfeeding and EC. PubMed, Web of Science, Chinese National Knowledge Infrastructure, China biology medical literature database, Wan fang databases and Database of Chinese Scientific and Technical Periodicals were searched for eligible observational studies up to 11 July 2015. Random effects model was used to calculate the pooled relative risks (RRs) and restricted cubic spline model was adopted for the does-response analysis. Fifteen articles with 623570 participants were identified. The RRs of these studies suggested that breastfeeding was associated with the reduced risk of EC (high versus low/no: RR = 0.74; 95% confidence interval (CI), 0.58–0.95). In subgroup analyses, a significant association of breastfeeding with EC risk was found in Asia (RR = 0.57, 95% CI 0.37–0.87), and an inverse association of breastfeeding with EC risk was found in cohort studies (RR = 0.62, 95% CI 0.41–0.94). The results were also significant after adjusted for hormone use (RR = 0.63, 95% CI 0.41–0.97) and body mass index (RR=0.65, 95% CI 0.44–0.96). A linear relationship was found of breastfeeding with EC (p for nonlinearity = 0.93), and it indicated that EC risk decreased by 1.2% for one month increment of breastfeeding. This meta-analysis indicates that long term breastfeeding might be associated with decreased risk of EC.
Collapse
Affiliation(s)
- Baojian Zhan
- Department of Epidemiology and Health Statistics, The Medical College of Qingdao University, Qingdao, Shandong Province, People's Republic of China
| | - Xiaoqin Liu
- Department of Epidemiology and Health Statistics, The Medical College of Qingdao University, Qingdao, Shandong Province, People's Republic of China
| | - Fang Li
- Department of Epidemiology and Health Statistics, The Medical College of Qingdao University, Qingdao, Shandong Province, People's Republic of China
| | - Dongfeng Zhang
- Department of Epidemiology and Health Statistics, The Medical College of Qingdao University, Qingdao, Shandong Province, People's Republic of China
| |
Collapse
|
20
|
Mishra GD, Chung HF, Pandeya N, Dobson AJ, Jones L, Avis NE, Crawford SL, Gold EB, Brown D, Sievert LL, Brunner E, Cade JE, Burley VJ, Greenwood DC, Giles GG, Bruinsma F, Goodman A, Hayashi K, Lee JS, Mizunuma H, Kuh D, Cooper R, Hardy R, Obermeyer CM, Lee KA, Simonsen MK, Yoshizawa T, Woods NF, Mitchell ES, Hamer M, Demakakos P, Sandin S, Adami HO, Weiderpass E, Anderson D. The InterLACE study: Design, data harmonization and characteristics across 20 studies on women's health. Maturitas 2016; 92:176-185. [PMID: 27621257 DOI: 10.1016/j.maturitas.2016.07.021] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 07/28/2016] [Accepted: 07/28/2016] [Indexed: 12/14/2022]
Abstract
OBJECTIVES The International Collaboration for a Life Course Approach to Reproductive Health and Chronic Disease Events (InterLACE) project is a global research collaboration that aims to advance understanding of women's reproductive health in relation to chronic disease risk by pooling individual participant data from several cohort and cross-sectional studies. The aim of this paper is to describe the characteristics of contributing studies and to present the distribution of demographic and reproductive factors and chronic disease outcomes in InterLACE. STUDY DESIGN InterLACE is an individual-level pooled study of 20 observational studies (12 of which are longitudinal) from ten countries. Variables were harmonized across studies to create a new and systematic synthesis of life-course data. MAIN OUTCOME MEASURES Harmonized data were derived in three domains: 1) socio-demographic and lifestyle factors, 2) female reproductive characteristics, and 3) chronic disease outcomes (cardiovascular disease (CVD) and diabetes). RESULTS InterLACE pooled data from 229,054 mid-aged women. Overall, 76% of the women were Caucasian and 22% Japanese; other ethnicities (of 300 or more participants) included Hispanic/Latin American (0.2%), Chinese (0.2%), Middle Eastern (0.3%), African/black (0.5%), and Other (1.0%). The median age at baseline was 47 years (Inter-quartile range (IQR): 41-53), and that at the last follow-up was 56 years (IQR: 48-64). Regarding reproductive characteristics, half of the women (49.8%) had their first menstruation (menarche) at 12-13 years of age. The distribution of menopausal status and the prevalence of chronic disease varied considerably among studies. At baseline, most women (57%) were pre- or peri-menopausal, 20% reported a natural menopause (range 0.8-55.6%) and the remainder had surgery or were taking hormones. By the end of follow-up, the prevalence rates of CVD and diabetes were 7.2% (range 0.9-24.6%) and 5.1% (range 1.3-13.2%), respectively. CONCLUSIONS The scale and heterogeneity of InterLACE data provide an opportunity to strengthen evidence concerning the relationships between reproductive health through life and subsequent risks of chronic disease, including cross-cultural comparisons.
Collapse
Affiliation(s)
- Gita D Mishra
- School of Public Health, The University of Queensland, Brisbane, Queensland, Australia.
| | - Hsin-Fang Chung
- School of Public Health, The University of Queensland, Brisbane, Queensland, Australia
| | - Nirmala Pandeya
- School of Public Health, The University of Queensland, Brisbane, Queensland, Australia
| | - Annette J Dobson
- School of Public Health, The University of Queensland, Brisbane, Queensland, Australia
| | - Lee Jones
- School of Public Health, The University of Queensland, Brisbane, Queensland, Australia
| | - Nancy E Avis
- Department of Social Sciences and Health Policy, Wake Forest University School of Medicine, Medical Center Blvd, Winston-Salem, NC, USA
| | - Sybil L Crawford
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Ellen B Gold
- Department of Public Health Sciences, University of California Davis, Davis, CA, USA
| | - Daniel Brown
- Department of Anthropology, University of Hawaii, Hilo, HI, USA
| | | | - Eric Brunner
- Department of Epidemiology and Public Health, University College London, London, UK
| | - Janet E Cade
- Nutritional Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds, UK
| | - Victoria J Burley
- Nutritional Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds, UK
| | - Darren C Greenwood
- Nutritional Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds, UK
| | - Graham G Giles
- Cancer Epidemiology Center, Cancer Council Victoria, Melbourne, Victoria, Australia
| | - Fiona Bruinsma
- Cancer Epidemiology Center, Cancer Council Victoria, Melbourne, Victoria, Australia
| | - Alissa Goodman
- Institute of Education, Center for Longitudinal Studies, University of London, London, UK
| | - Kunihiko Hayashi
- School of Health Sciences, Gunma University, Maebashi City, Gunma Prefecture, Japan
| | - Jung Su Lee
- Department of Health Promotion Science, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hideki Mizunuma
- Department of Obstetrics and Gynecology, Hirosaki University School of Medicine, Hirosaki, Japan
| | - Diana Kuh
- Medical Research Council Unit for Lifelong Health and Ageing at UCL, London, UK
| | - Rachel Cooper
- Medical Research Council Unit for Lifelong Health and Ageing at UCL, London, UK
| | - Rebecca Hardy
- Medical Research Council Unit for Lifelong Health and Ageing at UCL, London, UK
| | - Carla Makhlouf Obermeyer
- Center for Research on Population and Health, Faculty of Health Sciences, American University of Beirut, Lebanon
| | - Kathryn A Lee
- School of Nursing, University of California, San Francisco, CA, USA
| | | | - Toyoko Yoshizawa
- Department of Women's Health Nursing Tohoku University Graduate School of Medicine, Sendai Japan
| | - Nancy F Woods
- Biobehavioral Nursing and Health Systems, School of Nursing, University of Washington, Seattle, WA, USA
| | - Ellen S Mitchell
- Family and Child Nursing, School of Nursing, University of Washington, Seattle, WA, USA
| | - Mark Hamer
- Department of Epidemiology and Public Health, University College London, London, UK
| | - Panayotes Demakakos
- Department of Epidemiology and Public Health, University College London, London, UK
| | - Sven Sandin
- Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden
| | - Hans-Olov Adami
- Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden; Department of Epidemiology, Harvard School of Public Health, Boston, MA, USA
| | - Elisabete Weiderpass
- Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden; Samfundet Folkhälsan, Helsinki, Finland; Department of Community Medicine, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway; Department of Research, Cancer Registry of Norway, Oslo, Norway
| | - Debra Anderson
- Menzies Health Institute Queensland, Griffith University, Gold Coast, Queensland, Australia
| |
Collapse
|
21
|
Black A, Guilbert E, Costescu D, Dunn S, Fisher W, Kives S, Mirosh M, Norman W, Pymar H, Reid R, Roy G, Varto H, Waddington A, Wagner MS, Whelan AM, Mansouri S. Canadian Contraception Consensus (Part 3 of 4): Chapter 7--Intrauterine Contraception. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2016; 38:182-222. [PMID: 27032746 DOI: 10.1016/j.jogc.2015.12.002] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVE To provide guidelines for health care providers on the use of contraceptive methods to prevent pregnancy and on the promotion of healthy sexuality. OUTCOMES Overall efficacy of cited contraceptive methods, assessing reduction in pregnancy rate, safety, ease of use, and side effects; the effect of cited contraceptive methods on sexual health and general well-being; and the relative cost and availability of cited contraceptive methods in Canada. EVIDENCE Published literature was retrieved through searches of Medline and The Cochrane Database from January 1994 to January 2015 using appropriate controlled vocabulary (e.g., contraception, sexuality, sexual health) and key words (e.g., contraception, family planning, hormonal contraception, emergency contraception). Results were restricted to systematic reviews, randomized control trials/controlled clinical trials, and observational studies published in English from January 1994 to January 2015. Searches were updated on a regular basis in incorporated in the guideline to June 2015. Grey (unpublished) literature was identified through searching the websites of health technology assessment and health technology-related agencies, clinical practice guideline collections, clinical trial registries, and national and international medical specialty societies. VALUES The quality of the evidence in this document was rated using the criteria described in the Report of the Canadian Task Force on Preventive Health Care (Table 1). CHAPTER 7: INTRAUTERINE CONTRACEPTION: SUMMARY STATEMENTS 1. Intrauterine contraceptives are as effective as permanent contraception methods. (II-2) 2. The use of levonorgestrel-releasing intrauterine system (LNG-IUS) 52 mg by patients taking tamoxifen is not associated with recurrence of breast cancer. (I) 3. Intrauterine contraceptives have a number of noncontraceptive benefits. The levonorgestrel-releasing intrauterine system (LNG-IUS) 52 mg significantly decreases menstrual blood loss (I) and dysmenorrhea. (II-2) Both the copper intrauterine device and the LNG-IUS significantly decrease the risk of endometrial cancer. (II-2) 4. The risk of uterine perforation decreases with inserter experience but is higher in postpartum and breastfeeding women. (II-2) 5. The risk of pelvic inflammatory disease (PID) is increased slightly in the first month after intrauterine contraceptive (IUC) insertion, but the absolute risk is low. Exposure to sexually transmitted infections and not the IUC itself is responsible for PID occurring after the first month of use. (II-2) 6. Nulliparity is not associated with an increased risk of intrauterine contraceptive expulsion. (II-2) 7. Ectopic pregnancy with an intrauterine contraceptive (IUC) is rare, but when a pregnancy occurs with an IUC in situ, it is an ectopic pregnancy in 15% to 50% of the cases. (II-2) 8. In women who conceive with an intrauterine contraceptive (IUC) in place, early IUC removal improves outcomes but does not entirely eliminate risks. (II-2) 9. Intrauterine contraceptives do not increase the risk of infertility. (II-2) 10. Immediate insertion of an intrauterine contraceptive (10 minutes postplacental to 48 hours) postpartum or post-Caesarean section is associated with a higher continuation rate compared with insertion at 6 weeks postpartum. (I) 11. Immediate insertion of an intrauterine contraceptive (IUC; 10 minutes postplacental to 48 hours) postpartum or post-Caesarean section is associated with a higher risk of expulsion. (I) The benefit of inserting an IUC immediately postpartum or post-Caesarean section outweighs the disadvantages of increased risk of perforation and expulsion. (II-C) 12. Insertion of an intrauterine contraceptive in breastfeeding women is associated with a higher risk of uterine perforation in the first postpartum year. (II-2) 13. Immediate insertion of an intrauterine contraceptive (IUC) post-abortion significantly reduces the risk of repeat abortion (II-2) and increases IUC continuation rates at 6 months. (I) 14. Antibiotic prophylaxis for intrauterine contraceptive insertion does not significantly reduce postinsertion pelvic infection. (I) RECOMMENDATIONS: 1. Health care professionals should be careful not to restrict access to intrauterine contraceptives (IUC) owing to theoretical or unproven risks. (III-A) Health care professionals should offer IUCs as a first-line method of contraception to both nulliparous and multiparous women. (II-2A) 2. In women seeking intrauterine contraception (IUC) and presenting with heavy menstrual bleeding and/or dysmenorrhea, health care professionals should consider the use of the levonorgestrel intrauterine system 52 mg over other IUCs. (I-A) 3. Patients with breast cancer taking tamoxifen may consider a levonorgestrel-releasing intrauterine system 52 mg after consultation with their oncologist. (I-A) 4. Women requesting a levonorgestrel-releasing intrauterine system or a copper-intrauterine device should be counseled regarding changes in bleeding patterns, sexually transmitted infection risk, and duration of use. (III-A) 5. A health care professional should be reasonably certain that the woman is not pregnant prior to inserting an intrauterine contraceptive at any time during the menstrual cycle. (III-A) 6. Health care providers should consider inserting an intrauterine contraceptive immediately after an induced abortion rather than waiting for an interval insertion. (I-B) 7. In women who conceive with an intrauterine contraceptive (IUC) in place, the diagnosis of ectopic pregnancy should be excluded as arly as possible. (II-2A) Once an ectopic pregnancy has been excluded, the IUC should be removed without an invasive procedure. The IUC may be removed at the time of a surgical termination. (II-2B) 8. In the case of pelvic inflammatory disease, it is not necessary to remove the intrauterine contraceptive unless there is no clinical improvement after 48 to 72 hours of appropriate antibiotic treatment. (II-2B) 9. Routine antibiotic prophylaxis for intrauterine contraceptive (IUC) insertion is not indicated. (I-B) Health care providers should perform sexually transmitted infection (STI) testing in women at high risk of STI at the time of IUC insertion. If the test is positive for chlamydia and/or gonorrhea, the woman should be appropriately treated postinsertion and the IUC can remain in situ. (II-2B) 10. Unscheduled bleeding in intrauterine contraception users, when persistent or associated with pelvic pain, should be investigated to rule out infection, pregnancy, gynecological pathology, expulsion or malposition. (III-A)
Collapse
|
22
|
Wu QJ, Li YY, Tu C, Zhu J, Qian KQ, Feng TB, Li C, Wu L, Ma XX. Parity and endometrial cancer risk: a meta-analysis of epidemiological studies. Sci Rep 2015; 5:14243. [PMID: 26373341 PMCID: PMC4642705 DOI: 10.1038/srep14243] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 08/20/2015] [Indexed: 11/11/2022] Open
Abstract
The association between parity and endometrial cancer risk is inconsistent from observational studies. We aimed to quantitatively assess the relationship by summarizing all relevant epidemiological studies. PubMed (MEDLINE), Embase and Scopus were searched up to February 2015 for eligible case–control studies and prospective studies. Random-effects model was used to pool risk estimations. Ten prospective studies, 35 case-control studies and 1 pooled analysis of 10 cohort and 14 case-control studies including 69681 patients were identified. Pooled analysis revealed that there was a significant inverse association between parity and risk of endometrial cancer (relative risk (RR) for parous versus nulliparous: 0.69, 95% confidence interval (CI) 0.65–0.74; I2 = 76.9%). By evaluating the number of parity, we identified that parity number of 1, 2 or 3 versus nulliparous demonstrated significant negative association (RR = 0.73, 95% CI 0.64–0.84, I2 = 88.3%; RR = 0.62, 95% CI 0.53–0.74, I2 = 92.1%; and RR = 0.68, 95% CI 0.65–0.70, I2 = 20.0% respectively). The dose-response analysis suggested a nonlinear relationship between the number of parity and endometrial cancer risk. The RR decreased when the number of parity increased. This meta-analysis suggests that parity may be associated with a decreased risk of endometrial cancer. Further studies are warranted to replicate our findings.
Collapse
Affiliation(s)
- Qi-Jun Wu
- Department of Clinical Epidemiology, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning, China
| | - Yuan-Yuan Li
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu, 221000, China
| | - Chao Tu
- Oncology Institute, the Affiliated Hospital of Nanjing Medical University, Changzhou No.2 People's Hospital, Changzhou, Jiangsu, 213003, China
| | - Jingjing Zhu
- Program of Quantitative Methods in Education, University of Minnesota, Minneapolis, Minnesota, 55455, USA.,Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt University School of Medicine, Nashville, TN 37203, USA
| | - Ke-Qing Qian
- Oncology Institute, the Affiliated Hospital of Nanjing Medical University, Changzhou No.2 People's Hospital, Changzhou, Jiangsu, 213003, China
| | - Tong-Bao Feng
- Oncology Institute, the Affiliated Hospital of Nanjing Medical University, Changzhou No.2 People's Hospital, Changzhou, Jiangsu, 213003, China
| | - Changwei Li
- Department of Epidemiology, Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana, 70112, USA
| | - Lang Wu
- Center for Clinical and Translational Science, Mayo Clinic, Rochester, Minnesota, 55905, USA.,Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt University School of Medicine, Nashville, TN 37203, USA
| | - Xiao-Xin Ma
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning, China
| |
Collapse
|
23
|
Gong TT, Wang YL, Ma XX. Age at menarche and endometrial cancer risk: a dose-response meta-analysis of prospective studies. Sci Rep 2015; 5:14051. [PMID: 26360785 PMCID: PMC4566123 DOI: 10.1038/srep14051] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 08/17/2015] [Indexed: 11/09/2022] Open
Abstract
Evidence between age at menarche and endometrial cancer risk have been controversial. Therefore, we conducted a meta-analysis of prospective studies to analyze the aforementioned association. Relevant studies were identified by searching PubMed and EMBASE databases until the end of June 2015. A random-effects model was used to estimate summary relative risks (RRs) and 95% confidence intervals (CIs) for associations between menarcheal age and endometrial cancer risk. Our meta-analysis included eight prospective studies involving 4553 subjects with endometrial cancer. The summarized RRs of endometrial cancer for menarcheal age were 0.68 (95%CI = 0.58-0.81, I(2) = 41.9%, P = 0.099, n = 8) when comparing women with oldest category of menarcheal age with women with youngest category of menarcheal age. Notably, there was an 4% reduction in risk for per 2 years delay in menarcheal age (summarized RR = 0.96; 95%CI = 0.94-0.98, I(2) = 45.7%, P = 0.101, n = 6). Additionally, significant inverse associations were consistent within all stratified analyses. There was no evidence of publication bias or significant heterogeneity between subgroups detected by meta-regression analyses. Our findings support the hypothesis that late menarcheal age is inversely associated with endometrial cancer risk. Further larger prospective or pooled studies are warranted to fully adjust for potential confounders and distinguish whether the associations differ by histological subtypes of endometrial cancer.
Collapse
Affiliation(s)
- Ting-Ting Gong
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Yong-Lai Wang
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Xiao-Xin Ma
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, China
| |
Collapse
|
24
|
Endometrial cancer and oral contraceptives: an individual participant meta-analysis of 27 276 women with endometrial cancer from 36 epidemiological studies. Lancet Oncol 2015; 16:1061-1070. [PMID: 26254030 DOI: 10.1016/s1470-2045(15)00212-0] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 03/17/2015] [Accepted: 03/17/2015] [Indexed: 01/12/2023]
Abstract
BACKGROUND Oral contraceptives are known to reduce the incidence rate of endometrial cancer, but it is uncertain how long this effect lasts after use ceases, or whether it is modified by other factors. METHODS Individual participant datasets were sought from principal investigators and provided centrally for 27 276 women with endometrial cancer (cases) and 115 743 without endometrial cancer (controls) from 36 epidemiological studies. The relative risks (RRs) of endometrial cancer associated with oral contraceptive use were estimated using logistic regression, stratified by study, age, parity, body-mass index, smoking, and use of menopausal hormone therapy. FINDINGS The median age of cases was 63 years (IQR 57-68) and the median year of cancer diagnosis was 2001 (IQR 1994-2005). 9459 (35%) of 27 276 cases and 45 625 (39%) of 115 743 controls had ever used oral contraceptives, for median durations of 3·0 years (IQR 1-7) and 4·4 years (IQR 2-9), respectively. The longer that women had used oral contraceptives, the greater the reduction in risk of endometrial cancer; every 5 years of use was associated with a risk ratio of 0·76 (95% CI 0·73-0·78; p<0·0001). This reduction in risk persisted for more than 30 years after oral contraceptive use had ceased, with no apparent decrease between the RRs for use during the 1960s, 1970s, and 1980s, despite higher oestrogen doses in pills used in the early years. However, the reduction in risk associated with ever having used oral contraceptives differed by tumour type, being stronger for carcinomas (RR 0·69, 95% CI 0·66-0·71) than sarcomas (0·83, 0·67-1·04; case-case comparison: p=0·02). In high-income countries, 10 years use of oral contraceptives was estimated to reduce the absolute risk of endometrial cancer arising before age 75 years from 2·3 to 1·3 per 100 women. INTERPRETATION Use of oral contraceptives confers long-term protection against endometrial cancer. These results suggest that, in developed countries, about 400 000 cases of endometrial cancer before the age of 75 years have been prevented over the past 50 years (1965-2014) by oral contraceptives, including 200 000 in the past decade (2005-14). FUNDING Medical Research Council, Cancer Research UK.
Collapse
|
25
|
Wang L, Li J, Shi Z. Association between Breastfeeding and Endometrial Cancer Risk: Evidence from a Systematic Review and Meta-Analysis. Nutrients 2015; 7:5697-711. [PMID: 26184301 PMCID: PMC4517025 DOI: 10.3390/nu7075248] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 07/01/2015] [Accepted: 07/03/2015] [Indexed: 11/24/2022] Open
Abstract
Quantification of the association between breastfeeding and risk of endometrial cancer is still conflicting. We therefore conducted a meta-analysis to assess the association between breastfeeding and endometrial cancer risk. Pertinent studies were identified by a search of PubMed and Web of Knowledge through April 2015. A random effect model was used to combine the data for analysis. Sensitivity analysis and publication bias were conducted. Dose-response relationships were assessed by restricted cubic spline and variance-weighted least squares regression analysis. Fourteen articles involving 5158 endometrial cancer cases and 706,946 participants were included in this meta-analysis. Pooled results suggested that breastfeeding significantly reduced the risk of endometrial cancer (summary relative risk (RR): 0.77, 95% CI: 0.62–0.96, I2: 63.0%), especially in North America (summary RR: 0.87, 95% CI: 0.79–0.95). A linear dose-response relationship was found, with the risk of endometrial cancer decreased by 2% for every one-month increase in the duration of breastfeeding (summary RR: 0.98, 95% CI: 0.97–0.99). Our analysis suggested that breastfeeding, particularly a longer duration of breastfeeding, was inversely associated with the risk of endometrial cancer, especially in North America, but not in Europe and Asia, probably due to the small number of cases included. Due to this limitation, further studies originating in other countries are required to assess the association between breastfeeding and endometrial cancer risk.
Collapse
Affiliation(s)
- Lianlian Wang
- Department of Obstetrics, The Fourth Affiliated Hospital of China Medical University, Shenyang 110032, China.
| | - Jingxi Li
- Department of Obstetrics, The Fourth Affiliated Hospital of China Medical University, Shenyang 110032, China.
| | - Zhan Shi
- Department of Obstetrics, The Fourth Affiliated Hospital of China Medical University, Shenyang 110032, China.
| |
Collapse
|
26
|
Yang HP, Cook LS, Weiderpass E, Adami HO, Anderson KE, Cai H, Cerhan JR, Clendenen TV, Felix AS, Friedenreich CM, Garcia-Closas M, Goodman MT, Liang X, Lissowska J, Lu L, Magliocco AM, McCann SE, Moysich KB, Olson SH, Petruzella S, Pike MC, Polidoro S, Ricceri F, Risch HA, Sacerdote C, Setiawan VW, Shu XO, Spurdle AB, Trabert B, Webb PM, Wentzensen N, Xiang YB, Xu Y, Yu H, Zeleniuch-Jacquotte A, Brinton LA. Infertility and incident endometrial cancer risk: a pooled analysis from the epidemiology of endometrial cancer consortium (E2C2). Br J Cancer 2015; 112:925-33. [PMID: 25688738 PMCID: PMC4453954 DOI: 10.1038/bjc.2015.24] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 12/09/2014] [Accepted: 01/08/2015] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Nulliparity is an endometrial cancer risk factor, but whether or not this association is due to infertility is unclear. Although there are many underlying infertility causes, few studies have assessed risk relations by specific causes. METHODS We conducted a pooled analysis of 8153 cases and 11 713 controls from 2 cohort and 12 case-control studies. All studies provided self-reported infertility and its causes, except for one study that relied on data from national registries. Logistic regression was used to estimate adjusted odds ratios (OR) and 95% confidence intervals (CI). RESULTS Nulliparous women had an elevated endometrial cancer risk compared with parous women, even after adjusting for infertility (OR=1.76; 95% CI: 1.59-1.94). Women who reported infertility had an increased risk compared with those without infertility concerns, even after adjusting for nulliparity (OR=1.22; 95% CI: 1.13-1.33). Among women who reported infertility, none of the individual infertility causes were substantially related to endometrial cancer. CONCLUSIONS Based on mainly self-reported infertility data that used study-specific definitions of infertility, nulliparity and infertility appeared to independently contribute to endometrial cancer risk. Understanding residual endometrial cancer risk related to infertility, its causes and its treatments may benefit from large studies involving detailed data on various infertility parameters.
Collapse
Affiliation(s)
- H P Yang
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD 20892, USA
| | - L S Cook
- University of New Mexico, Albuquerque, NM 87131, USA
| | - E Weiderpass
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
- Department of Genetic Epidemiology, Folkhälsan Research Center, 00014 Helsinki, Finland
- Department of Research, Cancer Registry of Norway, N-0304 Oslo, Norway
- Department of Community Medicine, University of Tromsø, The Arctic University of Norway, 90109 Tromsø, Norway
| | - H-O Adami
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, SE-171 77 Stockholm, Sweden
- Department of Epidemiology, Harvard School of Public Health, Boston, MA 02115, USA
| | - K E Anderson
- School of Public Health, University of Minnesota, Minneapolis, MN 55454, USA
| | - H Cai
- Department of Medicine, Division of Epidemiology, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - J R Cerhan
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN 55905, USA
| | - T V Clendenen
- Department of Population Health and NYU Perimutter Cancer Center, New York University School of Medicine, New York, NY 10016, USA
| | - A S Felix
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD 20892, USA
| | | | | | - M T Goodman
- Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - X Liang
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - J Lissowska
- M. Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, 02-781 Warsaw, Poland
| | - L Lu
- Department of Chronic Disease Epidemiology, Yale School of Public Health, New Haven, CT 06510, USA
| | - A M Magliocco
- H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL33612, USA
| | - S E McCann
- Roswell Park Cancer Institute, Buffalo, NY 14203, USA
| | - K B Moysich
- Roswell Park Cancer Institute, Buffalo, NY 14203, USA
| | - S H Olson
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - S Petruzella
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - M C Pike
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA
| | - S Polidoro
- Human Genetics Foundation, 10126 Turin, Italy
| | - F Ricceri
- Human Genetics Foundation, 10126 Turin, Italy
| | - H A Risch
- Department of Chronic Disease Epidemiology, Yale School of Public Health, New Haven, CT 06510, USA
| | - C Sacerdote
- Human Genetics Foundation, 10126 Turin, Italy
- Unit of Cancer Epidemiology, University of Turin and Center for Cancer Prevention, 10124 Turin, Italy
| | - V W Setiawan
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA
| | - X O Shu
- Department of Medicine, Division of Epidemiology, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - A B Spurdle
- QIMR Berghofer Medical Research Institute, Herston, Queensland 4029, Australia
| | - B Trabert
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD 20892, USA
| | - P M Webb
- QIMR Berghofer Medical Research Institute, Herston, Queensland 4029, Australia
| | - N Wentzensen
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD 20892, USA
| | - Y-B Xiang
- Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Y Xu
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - H Yu
- University of Hawaii Cancer Center, Honolulu, HI 96813, USA
| | - A Zeleniuch-Jacquotte
- Department of Population Health and NYU Perimutter Cancer Center, New York University School of Medicine, New York, NY 10016, USA
| | - L A Brinton
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD 20892, USA
| |
Collapse
|
27
|
Cote ML, Alhajj T, Ruterbusch JJ, Bernstein L, Brinton LA, Blot WJ, Chen C, Gass M, Gaussoin S, Henderson B, Lee E, Horn-Ross PL, Kolonel LN, Kaunitz A, Liang X, Nicholson WK, Park AB, Petruzella S, Rebbeck TR, Setiawan VW, Signorello LB, Simon MS, Weiss NS, Wentzensen N, Yang HP, Zeleniuch-Jacquotte A, Olson SH. Risk factors for endometrial cancer in black and white women: a pooled analysis from the Epidemiology of Endometrial Cancer Consortium (E2C2). Cancer Causes Control 2015; 26:287-296. [PMID: 25534916 PMCID: PMC4528374 DOI: 10.1007/s10552-014-0510-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 12/09/2014] [Indexed: 01/24/2023]
Abstract
PURPOSE Endometrial cancer (EC) is the most common gynecologic cancer in the USA. Over the last decade, the incidence rate has been increasing, with a larger increase among blacks. The aim of this study was to compare risk factors for EC in black and white women. METHODS Data from seven cohort and four case-control studies were pooled. Unconditional logistic regression was used to estimate adjusted odds ratios (OR) and 95 % confidence intervals for each risk factor in blacks and whites separately. RESULTS Data were pooled for 2,011 black women (516 cases and 1,495 controls) and 19,297 white women (5,693 cases and 13,604 controls). BMI ≥ 30 was associated with an approximate threefold increase in risk of EC in both black and white women (ORblack 2.93, 95 % CI 2.11, 4.07 and ORwhite 2.99, 95 % CI 2.74, 3.26). Diabetes was associated with a 30-40 % increase in risk among both groups. Increasing parity was associated with decreasing risk of EC in blacks and whites (p value = 0.02 and <0.001, respectively). Current and former smoking was associated with decreased risk of EC among all women. Both black and white women who used oral contraceptives for 10 +years were also at reduced risk of EC (OR 0.49, 95 % CI 0.27, 0.88 and OR 0.69, 95 % CI 0.58, 0.83, respectively). Previous history of hypertension was not associated with EC risk in either group. CONCLUSIONS The major known risk factors for EC exert similar effects on black and white women. Differences in the incidence rates between the two populations may be due to differences in the prevalence of risk factors.
Collapse
Affiliation(s)
- Michele L Cote
- Department of Oncology, Wayne State University School of Medicine, 4100 John R. Mailstop: MM04EP, Detroit, MI, 48201, USA.
- Population Studies and Disparities Research Program, Karmanos Cancer Institute, Detroit, MI, USA.
| | - Tala Alhajj
- Department of Oncology, Wayne State University School of Medicine, 4100 John R. Mailstop: MM04EP, Detroit, MI, 48201, USA
| | - Julie J Ruterbusch
- Department of Oncology, Wayne State University School of Medicine, 4100 John R. Mailstop: MM04EP, Detroit, MI, 48201, USA
| | - Leslie Bernstein
- Department of Population Sciences, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Louise A Brinton
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, USA
| | - William J Blot
- Vanderbilt-Ingram Cancer Center, Nashville, TN, USA
- International Epidemiology Foundation, Rockville, MD, USA
| | - Chu Chen
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Margery Gass
- Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | | | - Brian Henderson
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Eunjung Lee
- Cancer Prevention Institute of California, Fremont, CA, USA
| | | | | | - Andrew Kaunitz
- University of Florida College of Medicine-Jacksonville, Jacksonville, FL, USA
| | - Xiaolin Liang
- Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | - Wanda K Nicholson
- Diabetes and Obesity Core, Center for Women's Health Research, School of Medicine, University of North Carolina-Chapel Hill, Chapel Hill, NC, USA
| | - Amy B Park
- Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Stacey Petruzella
- Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | - Timothy R Rebbeck
- School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - V Wendy Setiawan
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | | | - Michael S Simon
- Department of Oncology, Wayne State University School of Medicine, 4100 John R. Mailstop: MM04EP, Detroit, MI, 48201, USA
- Population Studies and Disparities Research Program, Karmanos Cancer Institute, Detroit, MI, USA
| | - Noel S Weiss
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
- School of Public Health, University of Washington, Seattle, WA, USA
| | - Nicolas Wentzensen
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, USA
| | - Hannah P Yang
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, USA
| | - Anne Zeleniuch-Jacquotte
- Departments of Population Health and Environmental Medicine, New York University School of Medicine, New York, NY, USA
| | - Sara H Olson
- Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| |
Collapse
|
28
|
Felix AS, Gaudet MM, La Vecchia C, Nagle CM, Shu XO, Weiderpass E, Adami HO, Beresford S, Bernstein L, Chen C, Cook LS, De Vivo I, Doherty JA, Friedenreich CM, Gapstur SM, Hill D, Horn-Ross PL, Lacey JV, Levi F, Liang X, Lu L, Magliocco A, McCann SE, Negri E, Olson SH, Palmer JR, Patel AV, Petruzella S, Prescott J, Risch HA, Rosenberg L, Sherman ME, Spurdle AB, Webb PM, Wise LA, Xiang YB, Xu W, Yang HP, Yu H, Zeleniuch-Jacquotte A, Brinton LA. Intrauterine devices and endometrial cancer risk: a pooled analysis of the Epidemiology of Endometrial Cancer Consortium. Int J Cancer 2014; 136:E410-22. [PMID: 25242594 DOI: 10.1002/ijc.29229] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 09/03/2014] [Accepted: 09/04/2014] [Indexed: 01/14/2023]
Abstract
Intrauterine devices (IUDs), long-acting and reversible contraceptives, induce a number of immunological and biochemical changes in the uterine environment that could affect endometrial cancer (EC) risk. We addressed this relationship through a pooled analysis of data collected in the Epidemiology of Endometrial Cancer Consortium. We combined individual-level data from 4 cohort and 14 case-control studies, in total 8,801 EC cases and 15,357 controls. Using multivariable logistic regression, we estimated pooled odds ratios (pooled-ORs) and 95% confidence intervals (CIs) for EC risk associated with ever use, type of device, ages at first and last use, duration of use and time since last use, stratified by study and adjusted for confounders. Ever use of IUDs was inversely related to EC risk (pooled-OR = 0.81, 95% CI = 0.74-0.90). Compared with never use, reduced risk of EC was observed for inert IUDs (pooled-OR = 0.69, 95% CI = 0.58-0.82), older age at first use (≥ 35 years pooled-OR = 0.53, 95% CI = 0.43-0.67), older age at last use (≥ 45 years pooled-OR = 0.60, 95% CI = 0.50-0.72), longer duration of use (≥ 10 years pooled-OR = 0.61, 95% CI = 0.52-0.71) and recent use (within 1 year of study entry pooled-OR = 0.39, 95% CI = 0.30-0.49). Future studies are needed to assess the respective roles of detection biases and biologic effects related to foreign body responses in the endometrium, heavier bleeding (and increased clearance of carcinogenic cells) and localized hormonal changes.
Collapse
Affiliation(s)
- Ashley S Felix
- Hormonal and Reproductive Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD; Cancer Prevention Fellowship Program, Division of Cancer Prevention, National Cancer Institute, Bethesda, MD
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Abstract
AbstractEndometrial cancer is the most common malignancy of women in developed countries, and its incidence is 10 times higher than in developing countries. Endometrial cancer is most common in the sixth and the seventh decades of life; thus, postmenopausal women have a higher risk of developing the disease compared with premenopausal women. The increased incidence and prevalence of endometrial cancer can be explained by the increase in life expectancy, increased caloric intake, increased obesity rates, and other changes in lifestyle and reproductive factors. Among the reproductive factors, the risk of endometrial cancer is positively correlated with a younger age at menarche and late age at menopause, infertility, null parity, age of the first child, and long-term use of unopposed estrogens for hormone replacement therapy. Protection against endometrial cancer has been detected with increase parity, the use of combined oral contraceptives, and increased age of women at last delivery. The relationship between endometrial cancer risk and miscarriage, abortion, ovulation induction drugs and in vitro fertilization is still controversial.
Collapse
|
30
|
Hromadnikova I, Kotlabova K, Pirkova P, Libalova P, Vernerova Z, Svoboda B, Kucera E. The occurrence of fetal microchimeric cells in endometrial tissues is a very common phenomenon in benign uterine disorders, and the lower prevalence of fetal microchimerism is associated with better uterine cancer prognoses. DNA Cell Biol 2013; 33:40-8. [PMID: 24283364 DOI: 10.1089/dna.2013.2125] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
This is the first study carried out to describe the role of fetal microchimerism (FM) in the pathogenesis of uterine cancer. The prevalence and concentration of male fetal microchimeric cells (FMCs) were examined in endometrial tissues in relation to subtypes of uterine cancer, and the histological grade and stage of the tumor. FM occurrence was analyzed in relation to risk factors, including hypertension, obesity, type 2 diabetes, dyslipidemia, age at cancer diagnosis, and patient pregnancy history. The prevalence and concentration of FMCs were examined in endometrial tissues using real-time polymerase chain reaction, SRY and β-globin sequences as markers for male fetal FMCs and total DNA. The studied group involved 47 type 1 endometrial cancers, 28 type 2 endometrial cancers, and 41 benign uterine diseases. While the prevalence of FM was decreased only in type 1 endometrial cancer, compared with benign uterine disorders (38.3% vs.70.7%; odds ratio [OR]=0.257, 95% confidence interval [CI]: 0.105 to 0.628, p=0.003), FMC concentrations did not differ within examined groups. The lower FM prevalence was detected in low-grade (grade 1 and grade 2) endometrioid cancer (38.3% vs. 70.7%, OR=0.256, 95% CI: 0.105 to 0.627, p=0.003) and in FIGO 1 tumors (40.7% vs. 70.7%, OR=0.285, 95% CI: 0.120 to 0.675, p=0.004). No correlation between FM prevalence or FMC concentrations and risk factors was demonstrated. A lower prevalence of male FM seemed to be associated with better prognoses in uterine cancer based on tumor subtype, histological grade, and stage of the tumor.
Collapse
Affiliation(s)
- Ilona Hromadnikova
- 1 Department of Molecular Biology and Cell Pathology, Third Faculty of Medicine, Charles University in Prague , Prague, Czech Republic
| | | | | | | | | | | | | |
Collapse
|
31
|
Lactation pattern and the risk for hormone-related female cancer in Japan: the Ohsaki Cohort Study. Eur J Cancer Prev 2013; 22:187-92. [PMID: 23358107 DOI: 10.1097/cej.0b013e3283564610] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Although breastfeeding is associated with a reduction in the risk for breast cancer, its relationship with another hormone-related female cancer, endometrial cancer, has not been fully investigated. The objective of the present study was to prospectively examine the association between lactation pattern and the risk for incidence of breast cancer and endometrial cancer in Japanese women. We analyzed data for 26 680 women registered in the Ohsaki National Health Insurance Cohort Study, who were 40-79 years old at the baseline. During the 11 years of follow-up, we identified 148 incident cases of breast cancer and 32 incident cases of endometrial cancer. Compared with breastfeeding only, multivariate hazard ratios and 95% confidence intervals for the risk of breast cancer incidence were 1.12 (0.92-1.37) for women who had performed mixed feeding and 1.80 (1.14-2.86) for those who fed their babies only with formula (P-trend=0.014). For endometrial cancer incidence, multivariate hazard ratios and 95% confidence intervals were 1.32 (0.86-2.03) for women who had performed mixed feeding and 3.26 (1.23-8.61) for those who had performed only formula feeding (P-trend=0.018). Our findings appear to raise the possibility that nonbreastfeeding is positively associated with the risks for both breast cancer incidence and endometrial cancer incidence. Confirmation of our findings would require further investigation.
Collapse
|
32
|
Gierisch JM, Coeytaux RR, Urrutia RP, Havrilesky LJ, Moorman PG, Lowery WJ, Dinan M, McBroom AJ, Hasselblad V, Sanders GD, Myers ER. Oral contraceptive use and risk of breast, cervical, colorectal, and endometrial cancers: a systematic review. Cancer Epidemiol Biomarkers Prev 2013; 22:1931-43. [PMID: 24014598 DOI: 10.1158/1055-9965.epi-13-0298] [Citation(s) in RCA: 211] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Oral contraceptives may influence the risk of certain cancers. As part of the AHRQ Evidence Report, Oral Contraceptive Use for the Primary Prevention of Ovarian Cancer, we conducted a systematic review to estimate associations between oral contraceptive use and breast, cervical, colorectal, and endometrial cancer incidence. We searched PubMed, Embase, and Cochrane Database of Systematic Reviews. Study inclusion criteria were women taking oral contraceptives for contraception or ovarian cancer prevention; includes comparison group with no oral contraceptive use; study reports quantitative associations between oral contraceptive exposure and relevant cancers; controlled study or pooled patient-level meta-analyses; sample size for nonrandomized studies ≥100; peer-reviewed, English-language; published from January 1, 2000 forward. Random-effects meta-analyses were conducted by estimating pooled ORs with 95% confidence intervals (CIs). We included 44 breast, 12 cervical, 11 colorectal, and 9 endometrial cancers studies. Breast cancer incidence was slightly but significantly increased in users (OR, 1.08; CI, 1.00-1.17); results show a higher risk associated with more recent use of oral contraceptives. Risk of cervical cancer was increased with duration of oral contraceptive use in women with human papillomavirus infection; heterogeneity prevented meta-analysis. Colorectal cancer (OR, 0.86; CI, 0.79-0.95) and endometrial cancer incidences (OR, 0.57; CI, 0.43-0.77) were significantly reduced by oral contraceptive use. Compared with never use, ever use of oral contraceptives is significantly associated with decreases in colorectal and endometrial cancers and increases in breast cancers. Although elevated breast cancer risk was small, relatively high incidence of breast cancers means that oral contraceptives may contribute to a substantial number of cases.
Collapse
Affiliation(s)
- Jennifer M Gierisch
- Authors' Affiliations: Center for Health Services Research in Primary Care, Durham Veterans Affairs Medical Center; Duke Evidence-Based Practice Center, Duke Clinical Research Institute; Departments of Medicine, Community and Family Medicine, Obstetrics and Gynecology, and Biostatistics and Bioinformatics, Duke University School of Medicine; Duke Cancer Institute, Duke University Health System; Duke Clinical Research Institute, Durham; and Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, North Carolina
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Urban M, Banks E, Egger S, Canfell K, O'Connell D, Beral V, Sitas F. Injectable and oral contraceptive use and cancers of the breast, cervix, ovary, and endometrium in black South African women: case-control study. PLoS Med 2012; 9:e1001182. [PMID: 22412354 PMCID: PMC3295825 DOI: 10.1371/journal.pmed.1001182] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2011] [Accepted: 01/26/2012] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND Oral contraceptives are known to influence the risk of cancers of the female reproductive system. Evidence regarding the relationship between injectable contraceptives and these cancers is limited, especially in black South Africans, among whom injectable contraceptives are used more commonly than oral contraceptives. METHODS AND FINDINGS We analysed data from a South African hospital-based case-control study of black females aged 18-79 y, comparing self-reported contraceptive use in patients with breast (n = 1,664), cervical (n = 2,182), ovarian (n = 182), and endometrial (n = 182) cancer, with self-reported contraceptive use in 1,492 control patients diagnosed with cancers with no known relationship to hormonal contraceptive use. We adjusted for potential confounding factors, including age, calendar year of diagnosis, education, smoking, alcohol, parity/age at first birth, and number of sexual partners. Among controls, 26% had used injectable and 20% had used oral contraceptives. For current and more recent users versus never users of oral or injectable contraceptives, the odds ratios (ORs) for breast cancer were significantly increased in users of oral and/or injectable contraceptives (OR 1.66, 95% CI 1.28-2.16, p<0.001) and separately among those exclusively using oral (1.57, 1.03-2.40, p = 0.04) and exclusively using injectable (OR 1.83, 1.31-2.55, p<0.001) contraceptives; corresponding ORs for cervical cancer were 1.38 (1.08-1.77, p = 0.01), 1.01 (0.66-1.56, p = 0.96), and 1.58 (1.16-2.15, p = 0.004). There was no significant increase in breast or cervical cancer risk among women ceasing hormonal contraceptive use ≥10 y previously (p = 0.3 and p = 0.9, respectively). For durations of use ≥5 y versus never use, the ORs of ovarian cancer were 0.60 (0.36-0.99, p = 0.04) for oral and/or injectable contraceptive use and 0.07 (0.01-0.49, p = 0.008) for injectable use exclusively; corresponding ORs for endometrial cancer were 0.44 (0.22-0.86, p = 0.02) and 0.36 (0.11-1.26, p = 0.1). CONCLUSIONS In this study, use of oral and of injectable hormonal contraceptives was associated with a transiently increased risk of breast and cervical cancer and, for long durations of use, with a reduced risk of ovarian and endometrial cancer. The observed effects of injectable and of oral contraceptives on cancer risk in this study did not appear to differ substantially.
Collapse
Affiliation(s)
- Margaret Urban
- NHLS/MRC Cancer Epidemiology Research Group, National Health Laboratory Services, Johannesburg, South Africa.
| | | | | | | | | | | | | |
Collapse
|
34
|
Milne FH, Judge DS, Preen DB, Weinstein P. Early life environment, life history and risk of endometrial cancer. Med Hypotheses 2011; 77:626-32. [PMID: 21831531 DOI: 10.1016/j.mehy.2011.07.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Accepted: 07/01/2011] [Indexed: 01/31/2023]
Affiliation(s)
- Fritha H Milne
- School of Anatomy & Human Biology, The University of Western Australia, Perth, Australia.
| | | | | | | |
Collapse
|
35
|
Chan TF, Wu CH, Changchien CC, Yang CY. Mortality from breast, endometrial and ovarian cancers among grand multiparous women in Taiwan. Aust N Z J Obstet Gynaecol 2011; 51:548-52. [PMID: 21910696 DOI: 10.1111/j.1479-828x.2011.01360.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Te-Fu Chan
- Department of Obstetrics and Gynecology, University Hospital, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung, Taiwan
| | | | | | | |
Collapse
|
36
|
Pocobelli G, Doherty JA, Voigt LF, Beresford SA, Hill DA, Chen C, Rossing MA, Holmes RS, Noor ZS, Weiss NS. Pregnancy history and risk of endometrial cancer. Epidemiology 2011; 22:638-45. [PMID: 21691206 PMCID: PMC3152311 DOI: 10.1097/ede.0b013e3182263018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Epidemiologic studies are consistent in finding that women who have had at least one birth are less likely to develop endometrial cancer. Less clear is whether timing of pregnancies during reproductive life influences risk, and the degree to which incomplete pregnancies are associated with a reduced risk. METHODS We evaluated pregnancy history in relation to endometrial cancer risk using data from a series of 4 population-based endometrial cancer case-control studies of women 45-74 years of age (1712 cases and 2134 controls) during 1985-2005 in western Washington State. Pregnancy history and information on other potential risk factors were collected by in-person interviews. RESULTS Older age at first birth was associated with a reduced risk of endometrial cancer after adjustment for number of births and age at last birth (test for trend P = 0.004). The odds ratio comparing women at least 35 years of age at their first birth with those younger than 20 years was 0.34 (95% confidence interval = 0.14-0.84). Age at last birth was not associated with risk after adjustment for number of births and age at first birth (test for trend P = 0.830). Overall, a history of incomplete pregnancies was not associated with endometrial cancer risk to any appreciable degree. CONCLUSIONS In this study, older age at first birth was more strongly associated with endometrial cancer risk than was older age at last birth. To date, there remains some uncertainty in the literature on this issue.
Collapse
Affiliation(s)
- Gaia Pocobelli
- Department of Epidemiology, School of Public Health, University of Washington, Seattle, WA 98195, USA.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Bevier M, Sundquist J, Hemminki K. Does the time interval between first and last birth influence the risk of endometrial and ovarian cancer? Eur J Cancer 2011; 47:586-91. [DOI: 10.1016/j.ejca.2010.10.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Revised: 10/04/2010] [Accepted: 10/08/2010] [Indexed: 11/16/2022]
|
38
|
Dossus L, Allen N, Kaaks R, Bakken K, Lund E, Tjonneland A, Olsen A, Overvad K, Clavel-Chapelon F, Fournier A, Chabbert-Buffet N, Boeing H, Schütze M, Trichopoulou A, Trichopoulos D, Lagiou P, Palli D, Krogh V, Tumino R, Vineis P, Mattiello A, Bueno-de-Mesquita HB, Onland-Moret NC, Peeters PHM, Dumeaux V, Redondo ML, Duell E, Sanchez-Cantalejo E, Arriola L, Chirlaque MD, Ardanaz E, Manjer J, Borgquist S, Lukanova A, Lundin E, Khaw KT, Wareham N, Key T, Chajes V, Rinaldi S, Slimani N, Mouw T, Gallo V, Riboli E. Reproductive risk factors and endometrial cancer: the European Prospective Investigation into Cancer and Nutrition. Int J Cancer 2010; 127:442-51. [PMID: 19924816 DOI: 10.1002/ijc.25050] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Endometrial cancer risk has been associated with reproductive factors (age at menarche, age at menopause, parity, age at first and last birth, time since last birth and use of oral contraceptives (OCs)]. However, these factors are closely interrelated and whether they act independently still requires clarification. We conducted a study to examine the association of menstrual and reproductive variables with the risk of endometrial cancer among the European Prospective Investigation into Cancer and Nutrition (EPIC). Among the 302,618 women eligible for the study, 1,017 incident endometrial cancer cases were identified. A reduction in endometrial cancer risk was observed in women with late menarche, early menopause, past OC use, high parity and a shorter time since last full-term pregnancy (FTP). No association was observed for duration of breast feeding after adjustment for number of FTP or for abortion (spontaneous or induced). After mutual adjustment, late age at menarche, early age at menopause and duration of OC use showed similar risk reductions of 7-8% per year of menstrual life, whereas the decreased risk associated with cumulative duration of FTPs was stronger (22% per year). In conclusion, our findings confirmed a reduction in risk of endometrial cancer with factors associated with a lower cumulative exposure to estrogen and/or higher exposure to progesterone, such as increasing number of FTPs and shorter menstrual lifespan and, therefore, support an important role of hormonal mechanisms in endometrial carcinogenesis.
Collapse
Affiliation(s)
- Laure Dossus
- German Cancer Research Center, Heidelberg, Germany.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Andreotti G, Hou L, Gao YT, Brinton LA, Rashid A, Chen J, Shen MC, Wang BS, Han TQ, Zhang BH, Sakoda LC, Fraumeni JF, Hsing AW. Reproductive factors and risks of biliary tract cancers and stones: a population-based study in Shanghai, China. Br J Cancer 2010; 102:1185-9. [PMID: 20216539 PMCID: PMC2853091 DOI: 10.1038/sj.bjc.6605597] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2009] [Revised: 01/26/2010] [Accepted: 02/15/2010] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Parity has been linked to gallbladder cancer and gallstones, but the effects of other reproductive factors are less clear. METHODS We examined 361 incident biliary tract cancer cases, 647 biliary stone cases, and 586 healthy women in a population-based study in Shanghai. RESULTS The effects of parity (odds ratios, OR(> or =3 vs 1 child)=2.0, 95% confidence interval (CI) 0.7-5.1), younger age at first birth (OR(per 1-year decrease)=1.2, 95% CI 0.99-1.6), and older age at menarche (OR(per 1-year increase)=1.4, 95% CI 1.1-1.8) on gallbladder cancer risk were more pronounced among women with stones, but the interactions were not significant. CONCLUSION Our results provide support for high parity, younger age at first birth, and late age at menarche in the development of gallbladder cancer, particularly among women with biliary stones.
Collapse
Affiliation(s)
- G Andreotti
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, DHHS, Bethesda, MD 20892, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
A life course approach to reproductive health: theory and methods. Maturitas 2010; 65:92-7. [PMID: 20079587 PMCID: PMC3504662 DOI: 10.1016/j.maturitas.2009.12.009] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2009] [Accepted: 12/10/2009] [Indexed: 11/22/2022]
Abstract
Taking a life course approach to the study of reproductive health involves the investigation of factors across life and, also across generations, that influence the timing of menarche, fertility, pregnancy outcomes, gynaecological disorders, and age at menopause. It also recognises the important influence of reproductive health on chronic disease risk in later life. Published literature supports the use of an integrated life course approach to study reproductive health, which examines the whole life course, considers the continuity of reproductive health and the interrelationship between the different markers of this. This is in contrast to more traditional approaches that tend to focus only on contemporary risk factors and which consider each marker of reproductive health separately. For instance, we found evidence linking early life factors such as growth, socioeconomic conditions, and parental divorce with ages at menarche and menopause, although the nature of the relationship differs. We discuss the different theoretical models that are used within life course epidemiology and which postulate pathways linking exposures across the life course to health outcomes, using examples of relevance to the study of reproductive health. These highlight the importance of examining timing of exposures, such as during critical periods in early life, and the temporal order of exposures. How life course frameworks of reproductive health can be developed to help identify hypotheses to be tested is also demonstrated. This approach has implications for the development of effective health policy that moves beyond identifying not only the type of intervention but also the most appropriate time across life to intervene.
Collapse
|
41
|
Liu P, Lu Y, Recker RR, Deng HW, Dvornyk V. ALOX12 gene is associated with the onset of natural menopause in white women. Menopause 2010; 17:152-6. [PMID: 20061896 PMCID: PMC2927106 DOI: 10.1097/gme.0b013e3181b63c68] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Natural menopause is a key physiological event in a woman's life. Timing of menopause affects risk for many postmenopausal systemic disorders and may thus influence life expectancy. Age at natural menopause (ANM) is largely determined genetically, but a list of candidate genes is far from complete. This study investigated the ALOX12 gene for its possible association with ANM. METHODS Six single-nucleotide polymorphisms (SNPs) of the gene (rs9904779, rs2073438, rs11571340, rs434473, rs2307214, and rs312462) were genotyped in a random sample of 210 unrelated white women. The SNPs and common haplotypes were then analyzed for their association with ANM. Smoking, alcohol consumption, and duration of breast-feeding were used as covariates. RESULTS Two SNPs, rs9904779 and rs434473 (encodes a replacement of asparagine by serine in the protein), were significantly associated with ANM (P = 0.022 and 0.033, respectively). The minor alleles of both SNPs seem to promote about 1.3- to 1.5-year earlier menopause and confer a 1.6 to 1.8 times higher risk for early menopause. All SNPs indicated significant or nearly significant interactions with alcohol use and duration of breast-feeding. Five common haplotypes were also associated with ANM. CONCLUSIONS The ALOX12 gene seems to be associated with the timing of natural menopause in white women.
Collapse
Affiliation(s)
- Pengyuan Liu
- Department of Surgery, Washington University in St Louis, St Louis, MO
| | - Yan Lu
- Department of Surgery, Washington University in St Louis, St Louis, MO
| | - Robert R. Recker
- Osteoporosis Research Center and Department of Biomedical Sciences, Creighton University, Omaha, NE
| | - Hong-Wen Deng
- School of Medicine, University of Missouri-Kansas City, Kansas City, MO
| | - Volodymyr Dvornyk
- School of Biological Sciences, The University of Hong Kong, Hong Kong SAR, PR China
| |
Collapse
|
42
|
Karageorgi S, Hankinson SE, Kraft P, De Vivo I. Reproductive factors and postmenopausal hormone use in relation to endometrial cancer risk in the Nurses' Health Study cohort 1976-2004. Int J Cancer 2009; 126:208-16. [PMID: 19551854 DOI: 10.1002/ijc.24672] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Endometrial cancer is a disease primarily driven by cumulative exposure to estrogen unopposed by progesterone. Reproductive factors associated with changes in endogenous hormone levels and use of exogenous hormones such as postmenopausal hormones influence the risk of disease. The authors used the Nurses' Health Study, comprised of 121,700 nurses, to assess the above associations. Over 28 years of follow-up, 778 adenocarcinoma cases were diagnosed and 1,850,078 person-years were accumulated. Cox proportional hazards models were used to estimate relative risks (RR) and 95% confidence intervals (CI). A late age at menarche decreased the risk independent of body mass index (BMI) (P-trend = 0.02). A late age at menopause increased cancer risk (P-trend = 0.0003). An advanced age at last birth reduced the risk (P-trend < 0.0001), however, an inverse association with age at first birth and parity diminished after adjustment for age at last birth. Compared with never users, an increased risk was observed among long-term (> or =5 years) users of both estrogen (E) (RR = 7.67, 95% CI: 5.57, 10.57) and combined estrogen plus progesterone (E+P) (RR = 1.52, 95% CI: 1.03, 2.23). Normal-weight (BMI < 25) women had the highest risk following E or E+P use (P-interaction-E = 0.0008, P-interaction-E+P = 0.02). The findings from this study underscore the importance of hormonal mechanisms in endometrial carcinogenesis.
Collapse
Affiliation(s)
- Stalo Karageorgi
- Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115, USA.
| | | | | | | |
Collapse
|
43
|
Hormone-related factors and gynecological conditions in relation to endometrial cancer risk. Eur J Cancer Prev 2009; 18:316-21. [DOI: 10.1097/cej.0b013e328329d830] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
44
|
Mishra GD, Cooper R, Tom SE, Kuh D. Early life circumstances and their impact on menarche and menopause. ACTA ACUST UNITED AC 2009; 5:175-90. [PMID: 19245355 DOI: 10.2217/17455057.5.2.175] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Ages at menarche and menopause have been shown to be associated with adverse health outcomes in later life. For example, earlier menarche and later menopause have been independently linked to higher risk of breast cancer. Earlier menarche may also be associated with an increased risk of endometrial cancer, menstrual problems and adult obesity. Given the associations of ages at menarche and menopause with future health outcomes, it is important to establish what factors across life, and generations, may influence these. This article examines the associations of early life factors, namely birthweight, bodyweight and growth during childhood, childhood socioeconomic circumstances and psychosocial factors with ages at menarche and menopause. It examines possible explanations of the associations found, including life history theory, and discusses areas for future research.
Collapse
Affiliation(s)
- Gita D Mishra
- MRC Unit for Lifelong Health & Ageing, University College & Royal Free Medical School, London, UK.
| | | | | | | |
Collapse
|
45
|
Pfeiffer RM, Mitani A, Landgren O, Ekbom A, Kristinsson SY, Björkholm M, Biggar RJ, Brinton LA. Timing of births and endometrial cancer risk in Swedish women. Cancer Causes Control 2009; 20:1441-9. [PMID: 19565342 DOI: 10.1007/s10552-009-9370-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2008] [Accepted: 05/25/2009] [Indexed: 10/20/2022]
Abstract
While a protective long-term effect of parity on endometrial cancer risk is well established, the impact of timing of births is not fully understood. We examined the relationship between endometrial cancer risk and reproductive characteristics in a population-based cohort of 2,674,465 Swedish women, 20-72 years of age. During follow-up from 1973 to 2004, 7,386 endometrial cancers were observed. Compared to uniparous women, nulliparous women had a significantly elevated endometrial cancer risk (hazard ratio [HR] = 1.32, 95% confidence interval [CI], 1.22-1.42). Endometrial cancer risk decreased with increasing parity; compared to uniparous women, women with > or =4 births had a HR = 0.66 (95% CI, 0.59-0.74); p-trend < 0.001. Among multiparous women, we observed no relationship of risk with age at first birth after adjustment for other reproductive factors. While we initially observed a decreased risk with later ages at last birth, this appeared to reflect a stronger relationship with time since last birth, with women with shorter times being at lowest risk. In models for multiparous women that included number of births, age at first and last birth, and time since last birth, age at last birth was not associated with endometrial cancer risk, while shorter time since last birth and increased parity were associated with statistically significantly reduced endometrial cancer risks. The HR was 3.95 (95% CI; 2.17-7.20; p-trend = <0.0001) for women with > or =25 years since a last birth compared to women having given birth within 4 years. Our findings support that clearance of initiated cells during delivery may be important in endometrial carcinogenesis.
Collapse
Affiliation(s)
- Ruth M Pfeiffer
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, 6120 Executive Blvd. EPS/RM 8030, Bethesda, MD 20892-7244, USA.
| | | | | | | | | | | | | | | |
Collapse
|
46
|
Schindler AE. Progestogen deficiency and endometrial cancer risk. Maturitas 2009; 62:334-7. [PMID: 19231117 DOI: 10.1016/j.maturitas.2008.12.018] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2008] [Revised: 12/29/2008] [Accepted: 12/29/2008] [Indexed: 10/21/2022]
Abstract
There is a close relationship between the amount of estogen and progesterone secreted by the ovary from puberty to menopause and the development of hyperplastic endometrium of all types and finally endometrial cancer. The endogenous endocrine pattern reflects progesterone deficiency (corpus luteum deficiency). Such deficiency can also develop when treatment with exogenous estrogen and progestogen is done and a deficiency of the progestogen in comparison to the used estrogen is induced in pre- and postmenopausal women. This risk is particular accentuated in the climacteric female when the endocrine milieu was unfavorable in the years before (menstrual cycle disorders, PCOS, obesity, no full-term pregnancy, no breast feeding, etc.). However, there are the additional factors, which modify the biological end result: "Progestogen deficiency". One main factor is the level of SHBG determined by the amount of free, biologically active estradiol. A low level of SHBG is for instance induced by high body weight. Therefore, the amount of overweight correlates with increased risk of endometrial hyperplasia and finally endometrial cancer. In addition, increasing body weight negatively affects proper ovarian function leading to corpus luteum deficiency and this in addition increases the risk of endometrial cancer. The classical risk increase for endometrial cancer is associated with oligomenorrhea or polymenorrhea combined with corpus luteum deficiency or anovulation. Therefore, women with PCOS are at increased risk for endometrial cancer in the pre- and postmenopausal years. Examples from the therapeutic point of view have been the risk increase found with biphasic estrogen high-dosed oral contraceptives with a long estrogen phase and a short progestogen phase. In climacteric females estrogen-only treatment results in a predictable increase in endometrial cancer risk. Therefore, it is mandatory to use estrogen/progestogen combinations. The lowest risk is achieved when a continuous estrogen/progestogen regimen is used. In addition, the lowest dose of estrogens for the individual woman should be chosen.
Collapse
Affiliation(s)
- Adolf E Schindler
- Institut für Medical Research and Education, Hufelandstrasse 55, Essen, Germany.
| |
Collapse
|
47
|
Wernli KJ, Ray RM, Gao DL, Fitzgibbons ED, Camp JE, Astrakianakis G, Seixas N, Li W, De Roos AJ, Feng Z, Thomas DB, Checkoway H. Occupational risk factors for endometrial cancer among textile workers in Shanghai, China. Am J Ind Med 2008; 51:673-9. [PMID: 18626909 DOI: 10.1002/ajim.20614] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE A case-cohort study was conducted to investigate associations between occupational exposures and endometrial cancer nested within a large cohort of textile workers in Shanghai, China. METHODS The study included 176 incident endometrial cancer cases diagnosed from 1989 to 1998 and a randomly-selected age-stratified reference subcohort (n = 3,061). Study subjects' complete work histories were linked to a job-exposure matrix developed specifically for the textile industry to assess occupational exposures. Hazard ratios (HR) and 95% confidence intervals were calculated using Cox proportional hazards modeling adapted for the case-cohort design, adjusting for age at menarche and a composite variable of gravidity and parity. RESULTS An increased risk of endometrial cancer was detected among women who had worked for > or =10 years in silk production (HR = 3.8, 95% CI 1.2-11.8) and had exposure to silk dust (HR = 1.7, 95% CI 0.9-3.4). Albeit with few exposed women (two cases and eight subcohort women), there was a 7.4-fold increased risk associated with > or =10 years of silica dust exposure (95% CI 1.4-39.7). CONCLUSIONS The findings suggest that some textile industry exposures might play a role in endometrial carcinoma and should be further replicated in other occupational settings.
Collapse
Affiliation(s)
- Karen J Wernli
- Program in Epidemiology, Fred Hutchinson Cancer Research Center, Seattle, Washington 9810, USA.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Oral contraceptives and the risk of all cancers combined and site-specific cancers in Shanghai. Cancer Causes Control 2008; 20:27-34. [PMID: 18704712 DOI: 10.1007/s10552-008-9213-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2008] [Accepted: 07/12/2008] [Indexed: 12/23/2022]
Abstract
From 1998 to 1991, an in-person baseline interview was administered to approximately 267,400 female textile workers in Shanghai, China. The cohort was followed until July 2000 for incident cancer cases. Incidence rate ratios (RR) for 12 types of cancers in users of oral contraceptives (OCs) were calculated using Cox Proportional Hazards analysis. There was a reduced risk of uterine corpus cancer for women who had ever used OCs (RR = 0.68, 95% CI = 0.45-1.04) and a trend of decreasing risk with increasing duration of use (p = 0.015). There was an increased risk of colon cancer in women who had used OCs for 10 years or more (RR = 1.56, 95% CI = 1.01-2.40) and an increased risk of rectal cancer in women who had ever used OCs (RR = 1.31, 95% CI = 0.98-1.75), with a trend of increasing risk with increasing duration of use (p = 0.017), but these associations may have been due to uncontrolled confounding by physical activity or other non-causal factors. No associations were observed between OCs and the risk of all cancers combined or for any of the nine other cancers. It is unlikely that the use of OCs has contributed to the temporal trends in cancer incidence in China in recent decades.
Collapse
|
49
|
Beining RM, Dennis LK, Smith EM, Dokras A. Meta-analysis of intrauterine device use and risk of endometrial cancer. Ann Epidemiol 2008; 18:492-9. [PMID: 18261926 DOI: 10.1016/j.annepidem.2007.11.011] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2007] [Revised: 11/11/2007] [Accepted: 11/18/2007] [Indexed: 11/18/2022]
Abstract
PURPOSE We sought to study the association between intrauterine device (IUD) use and endometrial cancer. METHODS A comprehensive search of literature published through April 2007 was conducted, studies reviewed, and data abstracted. Data from ten studies were pooled and analyzed using both fixed- and random-effects models to examine the association of ever use of an IUD and endometrial cancer. RESULTS Based on the random effects model, a protective crude association between IUD use and endometrial cancer was observed (odds ratio [OR] = 0.39; 95% confidence interval [CI] = 0.29-0.51; heterogeneity p < 0.001) with a pooled adjusted risk of OR = 0.54 (95% CI, 0.47-0.63; heterogeneity p = 0.40). A decreased risk of endometrial cancer also was seen for increased years of IUD use (OR for 5 years of use 0.88; 95% CI = 0.84-0.92; n = 5; heterogeneity p = 0.14), increased years since last IUD use (OR for 5 years of use 0.91; 95% CI, 0.86-0.95; n = 4; heterogeneity p = 0.02), and increased years since first IUD use (OR for 5 years of use 0.89; 95% CI, 0.83-0.95; n = 4; heterogeneity p = 0.04). CONCLUSIONS Our results suggest that nonhormonal IUD use may be associated with a decreased risk for endometrial cancer; however, the exact mechanism for this association is unclear. Future investigations should address the difference in the proposed association by specific type of IUDs.
Collapse
Affiliation(s)
- Robin M Beining
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA 52242, USA
| | | | | | | |
Collapse
|
50
|
Abstract
Intrauterine contraception is the most widely used method of reversible fertility regulation in the world. Finally, IUC is undergoing a renaissance in the US and it's role will expand as new devices and systems are developed and as old biases among clinicians and women are erased. Successful fertility regulation is a defining factor of the overall health of a population; the expanded use of IUC can help achieve that public health success.
Collapse
Affiliation(s)
- Laura MacIsaac
- Department of Obstetrics and Gynecology, Division of Family Planning, Albert Einstein College of Medicine of Yeshiva University, Bronx, NY 10461, USA.
| | | |
Collapse
|