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Fruit and vegetable consumption and risk of esophageal cancer in the Asian region: a systematic review and meta-analysis. Esophagus 2022; 19:27-38. [PMID: 34561813 DOI: 10.1007/s10388-021-00882-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 09/06/2021] [Indexed: 02/03/2023]
Abstract
The consumption of fruit and vegetables was reported to be associated with a reduced risk of esophageal cancer (EC) in many studies of esophageal adenocarcinoma (EAC) and esophageal squamous cell carcinoma (ESCC) from different regions worldwide. Therefore, to provide precise information to reduce the risk of EC in Asia, we performed a systematic review and meta-analysis of studies conducted in the Asian region about fruit and vegetable consumption and the risk of EC. We searched the MEDLINE (PubMed) and ICHUSHI (Japana Centra Revuo Medicina) databases from January 2010 to December 2020. The summary relative risk (SRR) and 95% CI were calculated using a random-effects model. In addition, I2 statistics were used to detect heterogeneity. Twenty-two studies were eligible for meta-analysis (16 case-control studies and 6 cohort studies). The SRR for the lowest versus highest fruit consumption was 0.64 (95% CI 0.53-0.77, I2 = 82%). That for the lowest versus highest vegetable consumption was 0.61 (95% CI 0.50-0.74, I2 = 81%). Based on subgroup analysis, a validated Food Frequency Questionnaire (FFQ) was significantly associated (SRR for fruit: 0.54; 95% CI 0.40-0.74, SRR for vegetable: 0.60; 95% CI 0.48-0.76) with low heterogeneity (I2 = 48% for fruit, I2 = 0% for vegetables). Egger's funnel plot asymmetry test demonstrated publication bias (P < 0.001 for fruit, P = 0.009 for vegetables). Fruit and vegetable consumption might be associated with a lower risk of EC in the Asian region. However, further substantial prospective studies with a validated FFQ and well-controlled important confounding factors are required to confirm the association.
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Yang L, Shi WY, Xu XH, Wang XF, Zhou L, Wu DP. Fish consumption and risk of non-Hodgkin lymphoma: A meta-analysis of observational studies. ACTA ACUST UNITED AC 2020; 25:194-202. [PMID: 25428434 DOI: 10.1179/1607845414y.0000000215] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Objectives: Whether a relationship between fish consumption and non-Hodgkin lymphoma (NHL) risk exists is an open issue. We carried out a meta-analysis to explore this association according to the published observational studies.Methods: We performed a search of databases in MEDLINE and EMBASE to identify relevant studies. We derived meta-analytic estimates using random-effects models, and assessed between-study heterogeneity using the Cochran's Q and I2 statistics.Results: We identified a total of seven case-control and two prospective cohort studies, including 7696 subjects with NHL. The summary relative risks (SRRs) estimated for NHL were 0.80 (95% confidence intervals (CIs): 0.68-0.94) for those in the highest fish consumption category compared with those in the lowest consumption category. There was evidence of significant heterogeneity across studies (Q = 26.72, Pheterogeneity = 0.002, I2 = 66.3%). Stratified analysis by study design indicated that a significant risk association between fish consumption and NHL was observed in case-control studies, but not in cohort studies. Based on the dose-response meta-analysis, the SRRs of NHL were 0.85 (95% CIs: 0.71-1.01) for three servings increased per week of fish consumed with evidence of significant heterogeneity (Pheterogeneity = 0.007, I2 = 63.9%).Conclusions: Findings from our meta-analysis indicate that consumption of fish may be not related to NHL risk.
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Affiliation(s)
- Li Yang
- First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology, Suzhou, Jiangsu, China.,Hematology Department, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - Wen-Yu Shi
- Hematology Department, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - Xiao-Hong Xu
- Nantong Cancer Hospital, Lymphoma Center, Nantong, Jiangsu, China
| | - Xin-Feng Wang
- Hematology Department, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - Lu Zhou
- Hematology Department, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - De-Pei Wu
- First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology, Suzhou, Jiangsu, China
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Lope V, Del Pozo MDP, Criado-Navarro I, Pérez-Gómez B, Pastor-Barriuso R, Ruiz E, Castelló A, Lucas P, Sierra Á, Salas-Trejo D, Llobet R, Martínez I, Romieu I, Chajès V, Priego-Capote F, Pollán M. Serum Phospholipid Fatty Acids and Mammographic Density in Premenopausal Women. J Nutr 2020; 150:2419-2428. [PMID: 32584993 DOI: 10.1093/jn/nxaa168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/26/2020] [Accepted: 05/19/2020] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The role of fatty acids (FAs) on mammographic density (MD) is unclear, and available studies are based on self-reported dietary intake. OBJECTIVES This study assessed the association between specific serum phospholipid fatty acids (PLFAs) and MD in premenopausal women. METHODS The cross-sectional study DDM-Madrid recruited 1392 Spanish premenopausal women, aged 39-50 y, who attended a screening in a breast radiodiagnosis unit of Madrid City Council. Women completed lifestyle questionnaires and FFQs. Percentage MD was estimated using a validated computer tool (DM-Scan), and serum PLFA percentages were measured by GC-MS. Multivariable linear regression models were used to quantify the association of FA tertiles with MD. Models were adjusted for age, education, BMI, waist circumference, parity, oral contraceptive use, previous breast biopsies, and energy intake, and they were corrected for multiple testing. RESULTS Women in the third tertile of SFAs showed significantly higher MD compared with those in the first tertile (βT3vsT1 = 7.53; 95% CI: 5.44, 9.61). Elevated relative concentrations of palmitoleic (βT3vsT1 = 3.12; 95% CI: 0.99, 5.25) and gondoic (βT3vsT1 = 2.67; 95% CI: 0.57, 4.77) MUFAs, as well as high relative concentrations of palmitelaidic (βT3vsT1 = 5.22; 95% CI: 3.15, 7.29) and elaidic (βT3vsT1 = 2.69; 95% CI: 0.59, 4.79) trans FAs, were also associated with higher MD. On the contrary, women with elevated relative concentrations of n-6 (ω-6) linoleic (βT3vsT1 = -5.49; 95% CI; -7.62, -3.35) and arachidonic (βT3vsT1 = -4.68; 95% CI: -6.79, -2.58) PUFAs showed lower MD. Regarding desaturation indices, an elevated palmitoleic to palmitic ratio and a low ratio of oleic to steric and arachidonic to dihomo-γ-linolenic acids were associated with higher MD. CONCLUSIONS Spanish premenopausal women with high relative concentrations of most SFAs and some MUFAs and trans FAs showed an increased MD, whereas those with high relative concentrations of some n-6 PUFAs presented lower density. These results, which should be confirmed in further studies, underscore the importance of analyzing serum FAs individually.
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Affiliation(s)
- Virginia Lope
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
| | - María Del Pilar Del Pozo
- Department of Preventive Medicine, Public Health, and Microbiology, Autonomous University of Madrid, Madrid, Spain
| | - Inmaculada Criado-Navarro
- Department of Analytical Chemistry, Annex Marie Curie Building, Campus of Rabanales, University of Cordoba, Cordoba, Spain
- Maimónides Institute of Biomedical Research, Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
| | - Beatriz Pérez-Gómez
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
| | - Roberto Pastor-Barriuso
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
| | - Emma Ruiz
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
| | - Adela Castelló
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
- Faculty of Medicine, University of Alcalá, Alcalá de Henares, Madrid, Spain
| | - Pilar Lucas
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
| | - Ángeles Sierra
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
| | - Dolores Salas-Trejo
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
- Valencian Breast Cancer Screening Program, General Directorate of Public Health, Valencia, Spain
- Center for Public Health Research CSISP, FISABIO, Valencia, Spain
| | - Rafael Llobet
- Institute of Computer Technology, Polytechnic University of Valencia, Valencia, Spain
| | - Inmaculada Martínez
- Valencian Breast Cancer Screening Program, General Directorate of Public Health, Valencia, Spain
- Center for Public Health Research CSISP, FISABIO, Valencia, Spain
| | - Isabelle Romieu
- Center for Research on Population Health, National Institute of Public Health, Cuernavaca, Mexico
- Huber Department of Global Health, Emory University, Atlanta, GA, USA
| | - Véronique Chajès
- Section of Nutrition and Metabolism, International Agency for Research on Cancer, Lyon, France
| | - Feliciano Priego-Capote
- Department of Analytical Chemistry, Annex Marie Curie Building, Campus of Rabanales, University of Cordoba, Cordoba, Spain
- Maimónides Institute of Biomedical Research, Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
| | - Marina Pollán
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
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del Pozo MDP, Lope V, Criado-Navarro I, Pastor-Barriuso R, Fernández de Larrea N, Ruiz E, Castelló A, Lucas P, Sierra Á, Romieu I, Chajès V, Priego-Capote F, Pérez-Gómez B, Pollán M. Serum Phospholipid Fatty Acids Levels, Anthropometric Variables and Adiposity in Spanish Premenopausal Women. Nutrients 2020; 12:E1895. [PMID: 32630591 PMCID: PMC7353394 DOI: 10.3390/nu12061895] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/16/2020] [Accepted: 06/23/2020] [Indexed: 02/05/2023] Open
Abstract
This study investigates the still uncertain association between serum phospholipid fatty acids (PL-FA), and anthropometric and adiposity variables. A cross-sectional study was conducted with 1443 Spanish premenopausal women. Participants answered an epidemiological and a food frequency questionnaire. Anthropometric variables were measured using a bioimpedance scale. Serum PL-FAs levels were determined by gas chromatography-mass spectrometry. The association between body mass index (BMI), weight gain, body fat percentage, visceral fat index, and waist circumference with serum PL-FAs and desaturation indices was evaluated using multivariable linear regression models. BMI was positively associated with the relative concentration of saturated fatty acids (SFAs) (β = 0.94, q-val = 0.001), and with palmitoleic, dihomo-γ-linolenic (DGLA), arachidonic (AA) and α-linolenic acids, and was inversely associated with oleic, gondoic, trans-vaccenic, linoleic and γ-linolenic acids. Total fat percentage was positively associated with DGLA and AA, and inversely with linoleic and γ-linolenic acids. Low relative concentrations of some SFAs and high levels of n-6 PUFAs were associated with greater waist circumference. While the oleic/stearic and AA/DGLA acid ratios were inversely associated with BMI, DGLA/linoleic acid ratio was positively related to almost all variables. In addition to BMI, total fat percentage and waist circumference were also associated with certain individual fatty acids.
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Affiliation(s)
- María del Pilar del Pozo
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain;
| | - Virginia Lope
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
| | - Inmaculada Criado-Navarro
- Department of Analytical Chemistry, Annex Marie Curie Building, Campus of Rabanales, University of Córdoba, 14014 Córdoba, Spain; (I.C.-N.); (F.P.-C.)
- Maimónides Institute of Biomedical Research (IMIBIC), Reina Sofia University Hospital, 14004 Córdoba, Spain
| | - Roberto Pastor-Barriuso
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
| | - Nerea Fernández de Larrea
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
| | - Emma Ruiz
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
| | - Adela Castelló
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
- Faculty of Medicine, University of Alcalá, Alcalá de Henares, 28871 Madrid, Spain
| | - Pilar Lucas
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
| | - Ángeles Sierra
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
| | - Isabelle Romieu
- Center for Research on Population Health, National Institute of Public Health, Cuernavaca 62100, Mexico;
- Huber Department of Global Health, Emory University, Atlanta, GA 30329, USA
| | - Véronique Chajès
- Section of Nutrition and Metabolism, International Agency for Research on Cancer, 69008 Lyon, France;
| | - Feliciano Priego-Capote
- Department of Analytical Chemistry, Annex Marie Curie Building, Campus of Rabanales, University of Córdoba, 14014 Córdoba, Spain; (I.C.-N.); (F.P.-C.)
- Maimónides Institute of Biomedical Research (IMIBIC), Reina Sofia University Hospital, 14004 Córdoba, Spain
| | - Beatriz Pérez-Gómez
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
| | - Marina Pollán
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
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Garduño‐Alanís A, Malyutina S, Pajak A, Stepaniak U, Kubinova R, Denisova D, Pikhart H, Peasey A, Bobak M, Stefler D. Association between soft drink, fruit juice consumption and obesity in Eastern Europe: cross-sectional and longitudinal analysis of the HAPIEE study. J Hum Nutr Diet 2020; 33:66-77. [PMID: 31475413 PMCID: PMC8425279 DOI: 10.1111/jhn.12696] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND Fruit juice and soft drink consumption have been shown to be related to obesity. However, this relationship has not been explored in Eastern Europe. The present study aimed to assess the cross-sectional and longitudinal relationships between fruit juice, soft drink consumption and body mass index (BMI) in Eastern European cohorts. METHODS Data from the Health, Alcohol and Psychosocial factors in Eastern Europe population-based prospective cohort study, based in Russia, Poland and the Czech Republic, were used. Intakes of sugar-sweetened beverage (SSB), artificially-sweetened beverage (ASB) and fruit juice were estimated from a food frequency questionnaire. Participant BMI values were assessed at baseline (n = 26 634) and after a 3-year follow-up (data available only for Russia, n = 5205). RESULTS Soft drink consumption was generally low, particularly in Russia. Compared to never drinkers of SSB, participants who drank SSB every day had a significantly higher BMI in the Czech [β-coefficient = 0.28; 95% confidence interval (CI) = 0.02-0.54], Russian (β-coefficient = 1.38; 95% CI = 0.62-2.15) and Polish (β-coefficient = 0.83; 95% CI = 0.29-1.37) cohorts. Occasional or daily ASB consumption was also positively associated with BMI in all three cohorts. Results for daily fruit juice intake were inconsistent, with a positive association amongst Russians (β-coefficient = 0.75; 95% CI = 0.28-1.21) but a negative trend in the Czech Republic (β-coefficient = -0.42; 95% CI = -0.86 to 0.02). Russians participants who drank SSB or ASB had an increased BMI after follow-up. CONCLUSIONS Our findings support previous studies suggesting that soft drink consumption (including SSBs and ASBs) is positively related to BMI, whereas our results for fruit juice were less consistent. Policies regarding these beverages should be considered in Eastern Europe to lower the risk of obesity.
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Affiliation(s)
- A. Garduño‐Alanís
- Department of Epidemiology and Public HealthUniversity College LondonLondonUK
- Research DepartmentUniversidad de la Salud del Estado de MéxicoTolucaMéxico
| | - S. Malyutina
- Research Institute of Internal and Preventive Medicine – Branch of the Institute of Cytology and GeneticsSiberian Branch of Russian Academy of SciencesNovosibirskRussia
- Novosibirsk State Medical UniversityNovosibirskRussia
| | - A. Pajak
- Department of Epidemiology and Population StudiesJagiellonian University Collegium MedicumKrakowPoland
| | - U. Stepaniak
- Department of Epidemiology and Population StudiesJagiellonian University Collegium MedicumKrakowPoland
| | - R. Kubinova
- National Institute of Public HealthPragueCzech Republic
| | - D. Denisova
- Research Institute of Internal and Preventive Medicine – Branch of the Institute of Cytology and GeneticsSiberian Branch of Russian Academy of SciencesNovosibirskRussia
| | - H. Pikhart
- Department of Epidemiology and Public HealthUniversity College LondonLondonUK
| | - A. Peasey
- Department of Epidemiology and Public HealthUniversity College LondonLondonUK
| | - M. Bobak
- Department of Epidemiology and Public HealthUniversity College LondonLondonUK
| | - D. Stefler
- Department of Epidemiology and Public HealthUniversity College LondonLondonUK
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Dietary glycaemic index and cognitive function: prospective associations in adults of the 1946 British birth cohort. Public Health Nutr 2018; 22:1415-1424. [PMID: 30585572 PMCID: PMC6906611 DOI: 10.1017/s136898001800352x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Objective Evidence suggests that the rate of glucose release following consumption of carbohydrate-containing foods, defined as the glycaemic index (GI), is inversely associated with cognitive function. To date, most of the evidence stems from either single-meal studies or highly heterogeneous cohort studies. We aimed to study the prospective associations of diet GI at age 53 years with outcomes of verbal memory and letter search tests at age 69 years and rate of decline between 53 and 69 years. Design Longitudinal population-based birth cohort study. Setting MRC National Survey for Health and Development. Participants Cohort members (n 1252). Results Using multivariable linear and logistic regression, adjusted for potential confounders, associations of higher-GI diet with lower verbal memory, lower letter search speed and lower number of hits in a letter search test were attenuated after adjustments for cognitive ability at age 15 years, educational attainment, further training and occupational social class. No association was observed between diet GI at 53 years and letter search accuracy or speed–accuracy trade-off at 69 years, or between diet GI at 53 years and rate of decline between 53 and 69 years in any cognitive measure. Conclusions Diet GI does not appear to predict cognitive function or decline, which was mainly explained by childhood cognitive ability, education and occupational social class. Our findings confirm the need for further research on the association between diet and cognition from a life-course perspective.
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Zheng B, Shen H, Han H, Han T, Qin Y. Dietary fiber intake and reduced risk of ovarian cancer: a meta-analysis. Nutr J 2018; 17:99. [PMID: 30376840 PMCID: PMC6208085 DOI: 10.1186/s12937-018-0407-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 10/17/2018] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Epidemiological studies regarding the association between dietary fiber intake and ovarian cancer risk are still inconsistent. We aimed to review the available evidence and conduct a dose-response meta-analysis to investigate the relationship between dietary fiber intake and ovarian cancer risk. METHODS Relevant studies were identified by searching PubMed, EMBASE, and the Cochrane Library databases before August 2017. Studies that reported relative risk (RR) estimates with 95% confidence intervals (CIs) for the association between dietary fiber intake and risk of ovarian cancer were included. Random-effects models were used to combine the estimated effects extracted from individual study. RESULTS Thirteen studies, with a total of 5777 ovarian cancer cases and 142,189 participants, met the inclusion criteria. The pooled multivariable RRs of ovarian cancer for the highest vs. the lowest category of dietary fiber intake was 0.78 (95% CI: 0.70, 0.88) with no evidence of heterogeneity (I2 = 4.20%, P = 0.40). Our dose-response analysis also showed a significant inverse association between dietary fiber intake and ovarian cancer risk (an increment of 10 g/day; combined RR: 0.88; 95% CI: 0.82, 0.93). There was no evidence for a nonlinear association (P for nonlinearity = 0.83). CONCLUSIONS This meta-analysis suggests a significant inverse dose-response association between dietary fiber intake and ovarian cancer risk. Further studies with prospective design that take account of more potential confounders are warranted to confirm this association.
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Affiliation(s)
- Bowen Zheng
- Department of Plastic Surgery, Second Hospital of Lanzhou University, Lanzhou, 730030 Gansu Province China
| | - Hui Shen
- Department of Pharmacognosy, School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai, 200433 China
| | - Hedong Han
- Department of Health Statistics, Second Military Medical University, Shanghai, 200433 China
| | - Ting Han
- Department of Pharmacognosy, School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai, 200433 China
| | - Yonghong Qin
- Department of Plastic Surgery, Second Hospital of Lanzhou University, Lanzhou, 730030 Gansu Province China
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Zhang S, Wang Q, He J. Intake of red and processed meat and risk of renal cell carcinoma: a meta-analysis of observational studies. Oncotarget 2017; 8:77942-77956. [PMID: 29100437 PMCID: PMC5652826 DOI: 10.18632/oncotarget.18549] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 06/02/2017] [Indexed: 11/25/2022] Open
Abstract
Background Findings on the association between intake of red and processed meat with renal cell carcinoma (RCC) risk are mixed. We conducted a meta-analysis to investigate this association. Materials and Methods Eligible studies up to August 31, 2016, were identified and retrieved by searching the MEDLINE and Embase databases along with manual review of the reference lists from the retrieved studies. The quality of the included studies was evaluated using the Newcastle-Ottawa Quality Assessment Scale. The summary relative risk (SRR) and corresponding 95% confidence interval (CI) were calculated using a random-effects model. Results Twenty-three publications were included in this meta-analysis: four cohort studies, one pooled study, and 18 case-control studies. The SRR (95% CI) for the highest vs. lowest intake of red meat was 1.36 (1.16–1.58, Pheterogeneity < 0.001); that for processed meat was 1.13 (95% CI, 1.03–1.24, Pheterogeneity = 0.014). Linear dose-response analysis yielded similar results, i.e., the SRR for per 100 g/day increment of red meat and per 50 g/day increment of processed meat was 1.21 (95% CI, 1.08–1.36) and 1.16 (95% CI, 0.99–1.36), respectively. A non-linear association was observed only for red meat (Pnonlinearity = 0.002), and not for processed meat (Pnonlinearity = 0.231). Statistically significant positive associations were observed for intake of beef, salami/ham/bacon/sausage, and hamburger. Conclusions This meta-analysis indicates a significant positive association between red and processed meat intake and RCC risk.
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Affiliation(s)
- Shaojing Zhang
- Department of Urology Surgery, The First Affiliated Hospital, Zhengzhou University, Zhengzhou, Henan Province, China
| | - Qingwei Wang
- Department of Urology Surgery, The First Affiliated Hospital, Zhengzhou University, Zhengzhou, Henan Province, China
| | - Juanjuan He
- Department of Breast Surgery, The First Affiliated Hospital, Zhengzhou University, Zhengzhou, Henan Province, China
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A high-fat, high-glycaemic index, low-fibre dietary pattern is prospectively associated with type 2 diabetes in a British birth cohort. Br J Nutr 2017; 115:1632-42. [PMID: 27245103 DOI: 10.1017/s0007114516000672] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The combined association of dietary fat, glycaemic index (GI) and fibre with type 2 diabetes has rarely been investigated. The objective was to examine the relationship between a high-fat, high-GI, low-fibre dietary pattern across adult life and type 2 diabetes risk using reduced rank regression. Data were from the MRC National Survey of Health and Development. Repeated measures of dietary intake estimated using 5-d diet diaries were available at the age of 36, 43 and 53 years for 1180 study members. Associations between dietary pattern scores at each age, as well as longitudinal changes in dietary pattern z-scores, and type 2 diabetes incidence (n 106) from 53 to 60-64 years were analysed. The high-fat, high-GI, low-fibre dietary pattern was characterised by low intakes of fruit, vegetables, low-fat dairy products and whole-grain cereals, and high intakes of white bread, fried potatoes, processed meat and animal fats. There was an increasing trend in OR for type 2 diabetes with increasing quintile of dietary pattern z-scores at the age of 43 years among women but not among men. Women in the highest z-score quintile at the age of 43 years had an OR for type 2 diabetes of 5·45 (95 % CI 2·01, 14·79). Long-term increases in this dietary pattern, independently of BMI and waist circumference, were also detrimental among women: for each 1 sd unit increase in dietary pattern z-score between 36 and 53 years, the OR for type 2 diabetes was 1·67 (95 % CI 1·20, 2·43) independently of changes in BMI and waist circumference in the same periods. A high-fat, high-GI, low-fibre dietary pattern was associated with increased type 2 diabetes risk in middle-aged British women but not in men.
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Association between selenium intake and the risk of pancreatic cancer: a meta-analysis of observational studies. Biosci Rep 2016; 36:BSR20160345. [PMID: 27623938 PMCID: PMC5064452 DOI: 10.1042/bsr20160345] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 09/13/2016] [Indexed: 12/21/2022] Open
Abstract
Quantification of the association between the intake of selenium and risk of pancreatic cancer is still conflicting. Thus, we conducted a meta-analysis to summarize the evidence from epidemiological studies of selenium intake with the risk of pancreatic cancer. Pertinent studies were identified by a search of PubMed and Web of Knowledge to July 2016. The random-effect model was used. Sensitivity analysis and publication bias were conducted. Data from six studies including 1424 pancreatic cancer cases were used in this meta-analysis. Pooled results suggested that highest selenium intake amount compared with lowest amount was significantly associated with the risk of pancreatic cancer [summary relative risk (RR)=0.659, 95% confidence interval (CI)=0.489-0.889, I2=47.6%]. The associations were significant both in case-control studies [RR=0.618, 95%CI=0.399-0.956, I2=59.1%] and Americas [RR=0.570, 95%CI=0.357-0.909, I2=65.6%]. No publication bias was found. Our analysis suggested that the higher intake of selenium might reduce the risk of pancreatic cancer.
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Dong Y, Wu G. Lack of association of poultry and eggs intake with risk of non-Hodgkin lymphoma: a meta-analysis of observational studies. Eur J Cancer Care (Engl) 2016; 26. [PMID: 27405484 DOI: 10.1111/ecc.12546] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/11/2016] [Indexed: 12/17/2022]
Affiliation(s)
- Y. Dong
- Cancer Center; Union Hospital; Tongji Medical College; Huazhong University of Science and Technology; Wuhan Hubei China
- Department of Oncology; Xiangyang Hospital Affiliated to Hubei University of Medicine; Xiangyang Hubei China
| | - G. Wu
- Cancer Center; Union Hospital; Tongji Medical College; Huazhong University of Science and Technology; Wuhan Hubei China
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Wei L, Liang G, Cai C, Lv J. Association of vitamin C with the risk of age-related cataract: a meta-analysis. Acta Ophthalmol 2016; 94:e170-6. [PMID: 25735187 DOI: 10.1111/aos.12688] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 01/12/2015] [Indexed: 11/29/2022]
Abstract
PURPOSE Whether vitamin C is a protective factor for age-related cataract remains unclear. Thus, we conducted a meta-analysis to summarize the evidence from epidemiological studies of vitamin C and the risk of age-related cataract. METHODS Pertinent studies were identified by searching in PubMed and in Webscience. The random effect model was used to combine the results. Meta-regression and subgroups analyses were used to explore potential sources of between-study heterogeneity. Publication bias was estimated using Egger's regression asymmetry test. RESULTS Finally, 15 articles with 20 studies for vitamin C intake and eight articles with 10 studies for serum ascorbate were included in this meta-analysis. The relative risk (RR) and 95% confidence interval of cataract for the highest versus the lowest category of vitamin C intake was 0.814 (0.707-0.938), and the associations were significant in America and Asia. Significant association of cataract risk with highest versus the lowest category of serum ascorbate was found in general [0.704 (0.564-0.879)]. Inverse associations were also found between serum ascorbate and nuclear cataract and posterior subcapsular cataract. CONCLUSIONS Higher vitamin C intake and serum ascorbate might be inversely associated with risk of cataract. Vitamin C intake should be advocated for the primary prevention of cataract.
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Affiliation(s)
- Lin Wei
- Department of Ophthalmology; The Second Artillery General Hospital; Beijing China
| | - Ge Liang
- Department of Ophthalmology; The Second Artillery General Hospital; Beijing China
| | - Chunmei Cai
- Department of Ophthalmology; The Second Artillery General Hospital; Beijing China
| | - Jin Lv
- Department of Ophthalmology; The Second Artillery General Hospital; Beijing China
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Stefler D, Pajak A, Malyutina S, Kubinova R, Bobak M, Brunner EJ. Comparison of food and nutrient intakes between cohorts of the HAPIEE and Whitehall II studies. Eur J Public Health 2015; 26:628-34. [PMID: 26637342 PMCID: PMC4946410 DOI: 10.1093/eurpub/ckv216] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Differences in dietary habits have been suggested as an important reason for the large health gap between Eastern and Western European populations. Few studies have compared individual-level nutritional data directly between the two regions. This study addresses this hypothesis by comparing food, drink and nutrient intakes in four large population samples. METHODS Czech, Polish and Russian participants of the Health, Alcohol and Psychosocial Factors in Eastern Europe (HAPIEE) study, and British participants in the Whitehall II study, altogether 29 972 individuals aged 45-73 years, were surveyed in 2002-2005. Dietary data were collected by customised food frequency questionnaires. Reported food, drink and nutrient intake data were harmonised and compared between cohorts using multivariable adjusted quantile regression models. RESULTS Median fruit and vegetable intakes were lower in the pooled Eastern European sample, but not in all country cohorts, compared with British subjects. Median daily consumption of fruits were 275, 213, 130 and 256 g in the Czech, Polish, Russian and Whitehall II cohort, respectively. The respective median daily intakes of vegetables were 185, 197, 292 and 246 g. Median intakes of animal fat foods and saturated fat, total fat and cholesterol nutrients were significantly higher in the Czech, Polish and Russian cohorts compared with the British; for example, median daily intakes of saturated fatty acids were 31.3, 32.5, 29.2 and 25.4 g, respectively. CONCLUSION Our findings suggest that there are important differences in dietary habits between and within Eastern and Western European populations which may have contributed to the health gap between the two regions.
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Affiliation(s)
- Denes Stefler
- 1 Department of Epidemiology and Public Health, University College London, London, UK
| | - Andrzej Pajak
- 2 Department of Epidemiology and Population Sciences, Jagiellonian University, Krakow, Poland
| | - Sofia Malyutina
- 3 Institute of Internal and Preventive Medicine, Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk, Russia 4 Novosibirsk State Medical University, Novosibirsk, Russia
| | - Ruzena Kubinova
- 5 Centre for Health Monitoring, National Institute of Public Health, Prague, Czech Republic
| | - Martin Bobak
- 1 Department of Epidemiology and Public Health, University College London, London, UK
| | - Eric J Brunner
- 1 Department of Epidemiology and Public Health, University College London, London, UK
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Yang L, Dong J, Jiang S, Shi W, Xu X, Huang H, You X, Liu H. Red and Processed Meat Consumption Increases Risk for Non-Hodgkin Lymphoma: A PRISMA-Compliant Meta-Analysis of Observational Studies. Medicine (Baltimore) 2015; 94:e1729. [PMID: 26559248 PMCID: PMC4912242 DOI: 10.1097/md.0000000000001729] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The association between consumption of red and processed meat and non-Hodgkin lymphoma (NHL) remains unclear. We performed a meta-analysis of the published observational studies to explore this relationship.We searched databases in MEDLINE and EMBASE to identify observational studies which evaluated the association between consumption of red and processed meat and risk of NHL. Quality of included studies was evaluated using Newcastle-Ottawa Quality Assessment Scale (NOS). Random-effects models were used to calculate summary relative risk (SRR) and the corresponding 95% confidence interval (CI).We identified a total of 16 case-control and 4 prospective cohort studies, including 15,189 subjects with NHL. The SRR of NHL comparing the highest and lowest categories were 1.32 (95% CI: 1.12-1.55) for red meat and 1.17 (95% CI: 1.07-1.29) for processed meat intake. Stratified analysis indicated that a statistically significant risk association between consumption of red and processed meat and NHL risk was observed in case-control studies, but not in cohort studies. The SRR was 1.11 (95% CI: 1.04-1.18) for per 100 g/day increment in red meat intake and 1.28 (95% CI: 1.08-1.53) for per 50 g/day increment in processed meat intake. There was evidence of a nonlinear association for intake of processed meat, but not for intake of red meat.Findings from our meta-analysis indicate that consumption of red and processed meat may be related to NHL risk. More prospective epidemiological studies that control for important confounders and focus on the NHL risk related with different levels of meat consumption are required to clarify this association.
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Affiliation(s)
- Li Yang
- From the Department of Hematology, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China (LY, SJ, WS, HH, XY, HL); Department of Hematology, Yancheng First People's Hospital, Yancheng, Jiangsu Province, China (JD); and Department of Internal medicine, Cancer Hospital of Nantong City and Affiliated Cancer Hospital of Nantong University, Nantong, Jiangsu Province, China (XX)
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Lv W, Zhong X, Xu L, Han W. Association between Dietary Vitamin A Intake and the Risk of Glioma: Evidence from a Meta-analysis. Nutrients 2015; 7:8897-904. [PMID: 26516909 PMCID: PMC4663566 DOI: 10.3390/nu7115438] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 09/23/2015] [Accepted: 09/28/2015] [Indexed: 11/16/2022] Open
Abstract
The results from epidemiological studies between dietary vitamin A intake and glioma risk is not consistent. Thus, a meta-analysis was conducted to confirm the exact relationship between them. PubMed and Web of Knowledge were used to search the relevant articles up to May 2015. Pooled relative risk (RR) with 95% confidence interval (CI)was calculated using random-effect model. Egger’s test was used to assess the small-study effect. At the end, seven articles with eight case-control studies involving 1841 glioma cases and 4123 participants were included. Our study indicated that highest category of dietary vitamin A intake was significantly associated with reduced risk of glioma (RR = 0.80, 95% CI = 0.62–0.98, p = 0.014, I2 = 54.9%). Egger’s test did not find any publication bias. In conclusion, our study indicated that higher category of dietary vitamin A intake could reduce the glioma risk. However, we could not do a dose-response analysis for vitamin A intake with glioma risk due to the limited data in each reported individual article. Due to this limitation, further studies with detailed dose, cases and person-years for each category is wanted to assess this dose-response association.
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Affiliation(s)
- Wen Lv
- Department of Internal Neurology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou 310016, China.
| | - Xian Zhong
- Department of Medical Oncology, Hangzhou Binjiang Hospital, Hangzhou 310052, China.
| | - Lingmin Xu
- Department of Medical Oncology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou 310016, China.
| | - Weidong Han
- Department of Medical Oncology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou 310016, China.
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Ben Q, Zhong J, Liu J, Wang L, Sun Y, Yv L, Yuan Y. Association Between Consumption of Fruits and Vegetables and Risk of Colorectal Adenoma: A PRISMA-Compliant Meta-Analysis of Observational Studies. Medicine (Baltimore) 2015; 94:e1599. [PMID: 26496264 PMCID: PMC4620815 DOI: 10.1097/md.0000000000001599] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
There have been contradictory results about the association of fruits and vegetables intake with colorectal adenoma (CRA) risk, the precursor lesion of colorectal cancer. Herein, we have conducted a meta-analysis of the published observational studies to have a clear understanding about this association.Eligible studies up to November 30, 2014, were identified and retrieved by searching MEDLINE and EMBASE databases along with the manual review of the reference list of the retrieved studies. The quality of the included studies was evaluated using Newcastle-Ottawa Quality Assessment Scale, and random-effects model was used to calculate summary relative risk (SRR) and corresponding 95% confidence interval (CI).A total of 22 studies involving 11,696 CRA subjects were part of this meta-analysis. The SRR for the highest versus the lowest intake of vegetables alone was 0.91 (95% CI: 0.80-1.02, Pheterogeneity = 0.025), whereas for vegetables and fruits combined, it was 0.82 (95% CI: 0.75-0.91, Pheterogeneity = 0.369), and for fruits alone, it was 0.79 (95% CI: 0.71-0.88, Pheterogeneity = 0.111). In addition, linear dose-response analysis also showed similar results, for example, for per 100 g/d increment of fruits, the SRR was 0.94 (95% CI: 0.92-0.97) and for vegetables it was 0.98 (95% CI: 0.96-1.01). Nonlinear association was only observed for vegetables (Pnonlinearity = 0.024), but not for fruits (Pnonlinearity = 0.583).Thus, this meta-analysis suggested that fruits consumption have a significant protective effect on CRA risk, but not vegetables. Moreover, we recommend additional studies with prospective designs that use validated questionnaires and control for important confounders to further validate the overall results.
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Affiliation(s)
- Qiwen Ben
- From the Department of Gastroenterology (QB, JZ, LW, YS, LY, YY), Ruijin Hospital, Shanghai Jiaotong University; and Department of Integrative Medicine (JL), Zhongshan Hospital, Fudan University, Shanghai, PR China
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Association between vitamin C intake and the risk of pancreatic cancer: a meta-analysis of observational studies. Sci Rep 2015; 5:13973. [PMID: 26360104 PMCID: PMC4566085 DOI: 10.1038/srep13973] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 08/12/2015] [Indexed: 12/12/2022] Open
Abstract
Quantification of the association between the intake of vitamin C and risk of pancreatic cancer is still conflicting. We therefore conducted a meta-analysis to assess the association between them. Pertinent studies were identified by a search of PubMed and Web of Knowledge throughSeptember of 2014. A random effects model was used to combine the data for analysis. Sensitivity analysis and publication bias were conducted. Data from 17 studies including 4827 pancreatic cancer cases were used in this meta-analysis. Pooled results suggested that highest vitamin C intake amount versus lowest amount was significantlyassociated with reduced the risk of pancreatic cancer [summary relative risk (RR) = 0.705, 95% CI = 0.612–0.811, I2 = 42.3%]. The associations were also significant both in Caucasian [summary RR = 0.741, 95% CI = 0.626–0.876], Asian [summary RR = 0.455, 95% CI = 0.275–0.754] and Mixed population [summary RR = 0.677, 95% CI = 0.508–0.901]. No publication bias was found. Our analysis suggested that the higher intake of vitamin C might reduce the risk of pancreatic cancer.
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The effect of fruit and vegetable intake on the development of lung cancer: a meta-analysis of 32 publications and 20,414 cases. Eur J Clin Nutr 2015; 69:1184-92. [PMID: 25920421 DOI: 10.1038/ejcn.2015.64] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 02/04/2015] [Accepted: 03/17/2015] [Indexed: 12/22/2022]
Abstract
BACKGROUND/OBJECTIVES Quantification of the association between the intake of vegetables and fruits and the risk of lung cancer is controversial. Thus, we conducted a meta-analysis to assess the relationship between vegetables and fruits and lung cancer risk. SUBJECTS/METHODS Pertinent studies were identified by a search in PubMed and Web of Knowledge. Random-effects models were used to calculate summary relative risks (RR) and the corresponding 95% confidence intervals (CI). Publication bias was estimated using Begg's test. RESULTS Finally, 30 articles with 37 studies comprising of 20,075 lung cancer cases for vegetables intake with lung cancer risk and 31 articles with 38 studies comprising of 20,213 lung cancer cases for fruits intake with lung cancer risk were included in this meta-analysis. The combined results showed that there were significant associations between vegetables and fruits intake and lung cancer risk. The pooled RR were 0.74 (95% CI: 0.67, 0.82) for vegetables and 0.80 (95% CI: 0.74, 0.88) for fruits. Significant association was found in females on vegetables intake and lung cancer but not in males. The association was also stronger in females than males on fruits intake and lung cancer risk. No publication bias was detected. CONCLUSIONS Our analysis indicated that intake of vegetables and fruits may have a protective effect on lung cancer, and the associations were stronger in females. As the potential biases and confounders could not be ruled out completely in this meta-analysis, further studies are needed.
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Zhou S, Wang X, Tan Y, Qiu L, Fang H, Li W. Association between Vitamin C Intake and Glioma Risk: Evidence from a Meta-Analysis. Neuroepidemiology 2015; 44:39-44. [DOI: 10.1159/000369814] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2014] [Accepted: 10/31/2014] [Indexed: 11/19/2022] Open
Abstract
Background: The field of quantifying the association between the intake of vitamin C and risk of glioma still has conflicts. Thus, we performed a comprehensive meta-analysis to test the hypothesis that a high intake of vitamin C may be a protective effect on glioma risk. Methods: Pertinent studies were identified by a search in PubMed and Web of Knowledge up to June 2014. The random-effect model was used to combine study-specific results. Publication bias was estimated using Begg' funnel plot and Egger's regression asymmetry test. Results: Thirteen articles with 15 studies (2 cohort study and 13 case-control studies) involving 3,409 glioma cases about vitamin C intake and glioma risk were used in this meta-analysis. The combined relative risks (RRs) of glioma associated with vitamin C intake was 0.86 (95% CIs = 0.75-0.99). Overall, significant protective associations were also found in the American population (RRs = 0.85, 95% CIs = 0.73-0.98) and case-control studies (RRs = 0.80, 95% CIs = 0.69-0.93). No publication bias was found. Conclusions: Our analysis indicated that vitamin C intake might decrease the risk of glioma, especially among the Americans.
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Association between cholesterol intake and pancreatic cancer risk: evidence from a meta-analysis. Sci Rep 2015; 5:8243. [PMID: 25649888 PMCID: PMC4316166 DOI: 10.1038/srep08243] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 12/16/2014] [Indexed: 11/20/2022] Open
Abstract
Quantification of the association between the intake of cholesterol and risk of pancreatic cancer is still conflicting. We therefore conducted a meta-analysis to summarize the evidence from epidemiological studies of cholesterol intake and the risk of pancreatic cancer. Pertinent studies were delivered by PubMed and Web of Knowledge issued through April of 2014. A random effects model was used to process the data for analysis. Sensitivity analysis and publication bias were conducted. Dose-response relationship was assessed by restricted cubic spline and variance-weighted least squares regression analysis. With 4513 pancreatic cases exemplified, 16 articles were applied in the meta-analysis. Pooled results suggest that cholesterol intake level was significantly associated with the risk of pancreatic cancer [summary relative risk (RR) = 1.371, 95%CI = 1.155–1.627, I2 = 58.2%], especially in America [summary RR = 1.302, 95%CI = 1.090–1.556]. A linear dose-response relation was attested that the risk of pancreatic cancer rises by 8% with 100 mg/day of cholesterol intake. [summary RR = 1.08, 95% CI = 1.04–1.13]. In conclusion, our analysis suggests that a high intake of cholesterol might increase the risk of pancreatic cancer, especially in America.
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Wei Y, Zou D, Cao D, Xie P. Association between processed meat and red meat consumption and risk for glioma: A meta-analysis from 14 articles. Nutrition 2015; 31:45-50. [DOI: 10.1016/j.nut.2014.04.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 04/16/2014] [Accepted: 04/20/2014] [Indexed: 01/29/2023]
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Qin S, Wang M, Zhang T, Zhang S. Vitamin E intake is not associated with glioma risk: evidence from a meta-analysis. Neuroepidemiology 2014; 43:253-8. [PMID: 25531943 DOI: 10.1159/000369345] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 10/19/2014] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Epidemiological studies evaluating the association between vitamin E intake and glioma risk have produced inconsistent results. Thus, we conducted a meta-analysis to summarize the evidence from epidemiological studies of vitamin E intake with the risk of glioma. METHODS Pertinent studies were identified by a search in pubmed and web of knowledge up to August 2014. The random-effect model was used to combine the results. Publication bias was estimated using the Egger's regression asymmetry test. RESULTS Twelve studies including 3180 glioma cases about vitamin E intake with the risk of glioma were included in this meta-analysis. The combined relative risk (RR) of glioma associated with vitamin E intake was 0.88 (95% CI = 0.69-1.12). The association was significant neither in the case-control studies nor in the cohort studies. No publication biases were found. CONCLUSIONS Our analysis indicated that vitamin E intake is not associated with the risk of glioma.
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Affiliation(s)
- Shiyong Qin
- Department of General Surgery, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, Shandong, PR China
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Jin J, Ouyang Z, Wang Z. Association of fruit and vegetables with the risk of nasopharyngeal cancer: evidence from a meta-analysis. Sci Rep 2014; 4:5229. [PMID: 25008797 PMCID: PMC5381608 DOI: 10.1038/srep05229] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 04/11/2014] [Indexed: 11/22/2022] Open
Abstract
Quantification of the association between the intake of vegetables and fruit and risk of nasopharyngeal cancer (NPC) is controversial. Thus, we conducted a meta-analysis to assess the relationship between vegetables and fruit and NPC risk. Pertinent studies were identified by a search in PubMed, Web of Knowledge and Wan Fang Med Online. Random-effects models were used to calculate summary relative risks (RRs) and the corresponding 95% confidence intervals (CIs). Publication bias was estimated using Egger's regression asymmetry test. Finally, 15 articles comprising 8208 NPC cases were included in this meta-analysis. The combined results showed that there was significant association between vegetables and fruit intake and NPC risk. The pooled RRs were 0.60 (95% CI = 0.47–0.76) for vegetables and 0.63 (95% CI = 0.56–0.70) for fruit. No publication bias was detected. Our analysis indicated that intake of vegetables and fruit may have a protective effect on NPC. Since the potential biases and confounders could not be ruled out completely in this meta-analysis, further studies are needed.
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Affiliation(s)
- Jian Jin
- 1] Department of Otorhinolaryngology, The Central Hospital of Yiwu City(Affiliated Hospital of Wen Zhou Medical University), Yiwu 322000, China [2]
| | - Zhiguo Ouyang
- 1] Department of Otorhinolaryngology, The Central Hospital of Yiwu City(Affiliated Hospital of Wen Zhou Medical University), Yiwu 322000, China [2]
| | - Zhaoyan Wang
- 1] Department of Otolaryngology Head and Neck Surgery, Xinhua Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China, 200092 [2] Ear Institute, Shanghai Jiao Tong University, School of Medicine, Shanghai, China, 200092
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Li BL, Jiang GX, Xue Q, Zhang H, Wang C, Zhang GX, Xu ZY. Dairy consumption and risk of esophageal squamous cell carcinoma: A meta-analysis of observational studies. Asia Pac J Clin Oncol 2014; 12:e269-79. [PMID: 24673835 DOI: 10.1111/ajco.12183] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/17/2014] [Indexed: 01/19/2023]
Abstract
AIM Inconsistent results regarding the relations between consumption of dairy products and the risk of esophageal squamous cell carcinoma (ESCC) have been reported. In this report, we summarized the evidence by a meta-analysis of observational studies. METHODS Eligible studies published up to January 31, 2013 were retrieved via both computer searches and a manual review of references. Random-effects models were used to calculate the summary relative risk (SRR) based on high versus low and dose-response analysis. RESULTS A total of 19 studies with 4315 ESCC cases were included in this meta-analysis. Overall, there were no significant associations between intakes of total dairy products, milk, cheese and butter and ESCC for the highest versus lowest intake categories (total dairy products: SRR 1.03, 95% confidence interval [CI]: 0.60-1.77; milk: SRR 0.93, 95% CI: 0.74-1.16; cheese: SRR 0.84, 95% CI: 0.61-1.15; butter: SRR 1.77, 95% CI 0.85-3.75). A significant inverse association was found for yogurt consumption (SRR 0.73, 95% CI: 0.54-0.98). There was high heterogeneity among studies on total dairy products, milk and butter; however, little or no heterogeneity was observed among studies on cheese and yogurt. CONCLUSION No associations between consumption of milk, dairy products, butter or cheese and risk of ESCC were found, while yogurt consumption may have a protective effect. However, these associations may be subject to high levels of heterogeneity or confounding, and further efforts should be made to confirm these findings.
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Affiliation(s)
- Bai-Ling Li
- Department of Cardiothoracic Surgery, Changhai Hospital of Second Military Medical University, Shanghai, China
| | - Geng-Xi Jiang
- Department of Cardiothoracic Surgery, Changhai Hospital of Second Military Medical University, Shanghai, China
| | - Qing Xue
- Department of Cardiothoracic Surgery, Changhai Hospital of Second Military Medical University, Shanghai, China
| | - Hao Zhang
- Department of Cardiothoracic Surgery, Changhai Hospital of Second Military Medical University, Shanghai, China
| | - Chong Wang
- Department of Cardiothoracic Surgery, Changhai Hospital of Second Military Medical University, Shanghai, China
| | - Guan-Xin Zhang
- Department of Cardiothoracic Surgery, Changhai Hospital of Second Military Medical University, Shanghai, China
| | - Zhi-Yun Xu
- Department of Cardiothoracic Surgery, Changhai Hospital of Second Military Medical University, Shanghai, China
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Wang Q, Chen Y, Wang X, Gong G, Li G, Li C. Consumption of fruit, but not vegetables, may reduce risk of gastric cancer: results from a meta-analysis of cohort studies. Eur J Cancer 2014; 50:1498-509. [PMID: 24613128 DOI: 10.1016/j.ejca.2014.02.009] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 02/08/2014] [Accepted: 02/10/2014] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND AIMS Quantification of the association between consumption of fruit and vegetables and risk of gastric cancer (GC) is controversial. We aimed to conduct a meta-analysis of cohort studies to evaluate the associations. METHODS Eligible studies published up to 31st August 2013 were retrieved via both computer searches of PubMed and EMBASE and a manual review of references. Random-effects models were used to calculate summary relative risk (SRR). Heterogeneity among studies was assessed using Cochran's Q and I(2) statistics. RESULTS A total of 17 articles (24 studies), were included in this meta-analysis. There were >2.4 million individuals (6632 GC events) with a median follow-up of 10years. Based on the high versus low analysis, consumption of fruit, but not vegetables, may reduce risk of gastric cancer (fruit: SRR=0.90, 95% confidence interval (CI): 0.83-0.98, Pheterogeneity=0.450; vegetable: SRR=0.96, 95% CI: 0.88-1.06, Pheterogeneity=0.150). Meta regression analysis suggested that outcome (incidence versus mortality) and study quality (high versus low) contributed significantly to heterogeneity. The same results were also shown in the linear dose-response analysis (per 100-g/day) (fruit: SRR=0.95, 95% CI: 0.91-0.99; vegetable: SRR=0.96, 95% CI: 0.91-1.01). Significant inverse associations emerged in non-linear models for consumption of fruit (Pnon-linearity=0.04), but not for consumption of vegetables (Pnon-linearity=0.551). CONCLUSIONS Findings from this meta-analysis indicate a significant protective effect for the consumption of fruit on GC risk, but not for the consumption of vegetables.
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Affiliation(s)
- Qingbing Wang
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, Shanghai 200032, PR China; Shanghai Institute of Medical Imaging, Shanghai 200032, PR China
| | - Yi Chen
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, Shanghai 200032, PR China; Shanghai Institute of Medical Imaging, Shanghai 200032, PR China.
| | - Xiaolin Wang
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, Shanghai 200032, PR China; Shanghai Institute of Medical Imaging, Shanghai 200032, PR China
| | - Gaoquan Gong
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, Shanghai 200032, PR China; Shanghai Institute of Medical Imaging, Shanghai 200032, PR China
| | - Guoping Li
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, Shanghai 200032, PR China
| | - Changyu Li
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, Shanghai 200032, PR China
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Ben Q, Sun Y, Chai R, Qian A, Xu B, Yuan Y. Dietary fiber intake reduces risk for colorectal adenoma: a meta-analysis. Gastroenterology 2014; 146:689-699.e6. [PMID: 24216326 DOI: 10.1053/j.gastro.2013.11.003] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 10/31/2013] [Accepted: 11/03/2013] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS Reports on the association between dietary fiber intake and risk of colorectal adenoma (CRA), the precursor of colorectal cancer, have been inconsistent. We conducted a meta-analysis of case-control and cohort studies to analyze this association. METHODS We searched the MEDLINE and EMBASE databases to identify relevant studies published through July 2013. A random-effects model was used to estimate summary relative risks (SRRs) and 95% confidence intervals (CIs) for associations between fiber intake and CRA risk. Heterogeneity among studies was assessed using the Cochran Q and I(2) statistics. RESULTS Our meta-analysis included 20 studies involving 10,948 subjects with CRA. The SRRs of CRA for total dietary fiber were 0.72 (95% CI, 0.63-0.83) in a high- vs low-intake analysis and 0.91 (95% CI, 0.87-0.95) per 10-g/day increase in fiber intake in a dose-response model. Subgroup analyses indicated a significant inverse association between total fiber intake and CRA risk in case-control studies (SRR, 0.66; 95% CI, 0.56-0.77), but not in cohort studies (SRR, 0.92; 95% CI, 0.76-1.10). The SRRs of CRA were 0.84 for fruit fiber (95% CI, 0.76-0.94; n = 6 studies), 0.93 for vegetable fiber (95% CI, 0.84-1.04; n = 6 studies), and 0.76 for cereal fiber (95% CI, 0.62-0.92; n = 9 studies) in high- vs low-intake analyses. CONCLUSIONS Our findings support the hypothesis that high dietary fiber intake is associated inversely with CRA risk. Further studies with prospective designs that use validated questionnaires and control for important confounders are warranted.
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Affiliation(s)
- Qiwen Ben
- Department of Gastroenterology, Ruijin Hospital, Shanghai Jiaotong University, Shanghai, PR China
| | - Yunwei Sun
- Department of Gastroenterology, Ruijin Hospital, Shanghai Jiaotong University, Shanghai, PR China
| | - Rui Chai
- Department of Colorectal Surgery, Zhejiang Provincial People's Hospital, Hangzhou, Zhejiang, PR China
| | - Aihua Qian
- Department of Gastroenterology, Ruijin Hospital, Shanghai Jiaotong University, Shanghai, PR China
| | - Bin Xu
- Department of Gastroenterology, Ruijin Hospital, Shanghai Jiaotong University, Shanghai, PR China
| | - Yaozong Yuan
- Department of Gastroenterology, Ruijin Hospital, Shanghai Jiaotong University, Shanghai, PR China.
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Intake of vegetables and fruit and risk of esophageal adenocarcinoma: a meta-analysis of observational studies. Eur J Nutr 2014; 53:1511-21. [PMID: 24448974 DOI: 10.1007/s00394-014-0656-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 01/13/2014] [Indexed: 01/13/2023]
Abstract
OBJECTIVES To study the association between the intake of fruit and vegetables and risk of esophageal adenocarcinoma (EAC), we summarized the evidence from observational studies in categorical and linear dose-response meta-analyses. METHODS Eligible studies published up to June 2013 were retrieved via computerized searches of MEDLINE and EMBASE. Random-effects models were used to calculate summary relative risks (SRRs) and the corresponding 95% confidence intervals (CIs). Between-study heterogeneity was assessed using the Cochran's Q and I (2) statistics. RESULTS A total of 12 studies involving 1,572 cases of EAC were included in this meta-analysis. Based on the highest versus lowest analysis, inverse associations were observed between intakes of vegetable (SRRs = 0.76, 95% CIs 0.59-0.96; P heterogeneity = 0.098, I (2) 40.4%; n = 9 studies), intakes of fruit (SRRs = 0.73, 95% CIs, 0.55-0.98; P heterogeneity = 0.03, I (2) = 52.9%; n = 9 studies), and intakes of total vegetables and fruit combined (SRRs = 0.68, 95% CI 0.49-0.93; P heterogeneity = 0.162, I (2) = 38.9%; n = 5 studies). Similar results were also observed in a linear dose-response analysis. CONCLUSION These data support the hypothesis that intakes of vegetables and fruit may significantly reduce the risk of EAC. Further investigation with prospective designs, validated questionnaires, and good control of important confounders is warranted.
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Qureshi SA, Lund AC, Veierød MB, Carlsen MH, Blomhoff R, Andersen LF, Ursin G. Food items contributing most to variation in antioxidant intake; a cross-sectional study among Norwegian women. BMC Public Health 2014; 14:45. [PMID: 24433390 PMCID: PMC3902183 DOI: 10.1186/1471-2458-14-45] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 01/12/2014] [Indexed: 01/18/2023] Open
Abstract
Background Fruit and vegetable intake has been found to reduce the risk of cardiovascular disease, certain types of cancer and diabetes mellitus. It is possible that antioxidants play a large part in this protective effect. However, which foods account for the variation in antioxidant intake in a population is not very clear. We used food frequency data from a population-based sample of women to identify the food items that contributed most to the variation in antioxidant intake in Norwegian diet. Methods We used data from a study conducted among participants in the Norwegian Breast Cancer Screening Program (NBCSP), the national program which invites women aged 50–69 years to mammographic screening every 2 years. A subset of 6514 women who attended the screening in 2006/2007 completed a food frequency questionnaire (FFQ). Daily intake of energy, nutrients and antioxidant intake were estimated. We used multiple linear regression analysis to capture the variation in antioxidant intake. Results The mean (SD) antioxidant intake was 23.0 (8.5) mmol/day. Coffee consumption explained 54% of the variation in antioxidant intake, while fruits and vegetables explained 22%. The twenty food items that contributed most to the total variation in antioxidant intake explained 98% of the variation in intake. These included different types of coffee, tea, red wine, blueberries, walnuts, oranges, cinnamon and broccoli. Conclusions In this study we identified a list of food items which capture the variation in antioxidant intake among these women. The major contributors to dietary total antioxidant intake were coffee, tea, red wine, blueberries, walnuts, oranges, cinnamon and broccoli. These items should be assessed in as much detail as possible in studies that wish to capture the variation in antioxidant intake.
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Affiliation(s)
| | | | | | | | | | | | - Giske Ursin
- Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway.
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Diorio C, Dumas I. Relations of omega-3 and omega-6 intake with mammographic breast density. Cancer Causes Control 2014; 25:339-51. [PMID: 24402865 DOI: 10.1007/s10552-013-0335-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Accepted: 12/26/2013] [Indexed: 11/30/2022]
Abstract
PURPOSE Omega-3 (n-3) and n-6 fatty acids (FA) intake could influence the occurrence of certain diseases such as breast cancer but little is known about their relation to mammographic density (MD). The purpose of this study is to examine the association of the intake of n-3 FA and n-6 FA with MD among 777 premenopausal and 783 postmenopausal women. METHODS In this cross-sectional study, FA intake was assessed with a self-administered food-frequency questionnaire and MD was measured using a computer-assisted method. Multivariate analyses were performed by using generalized linear models to evaluate the associations of quartiles of FA intake with MD. RESULTS For increasing quartiles of total long-chain n-3 FA intake (< 0.11, 0.11-0.20, 0.21-0.32, and ≥ 0.33 g/day), adjusted mean MD was 29, 29, 27, and 25 %, respectively (P trend = 0.005). This association remained significant among postmenopausal (P trend = 0.006) but not among premenopausal (P trend = 0.21) women. No significant association was found between n-6 FA intake and MD. However, for increasing quartiles of the n-6 FA/long-chain n-3 FA ratio intake (< 31.75, 31.75-52.28, 52.29-94.28, and ≥ 94.29), adjusted mean MD was 26, 27, 29, and 29 %, respectively (P trend = 0.008). CONCLUSIONS Higher intake of long-chain n-3 FA was associated with lower MD, suggesting that increased long-chain n-3 FA intake could be a strategy for breast cancer prevention.
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Affiliation(s)
- Caroline Diorio
- Axe oncologie, Centre de recherche du CHU de Québec, 1050 Chemin Sainte-Foy, Quebec City, QC, G1S 4L8, Canada,
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Abstract
The field of nutrigenomics shows tremendous promise for improved understanding of the effects of dietary intake on health. The knowledge that metabolic pathways may be altered in individuals with genetic variants in the presence of certain dietary exposures offers great potential for personalized nutrition advice. However, although considerable resources have gone into improving technology for measurement of the genome and biological systems, dietary intake assessment remains inadequate. Each of the methods currently used has limitations that may be exaggerated in the context of gene × nutrient interaction in large multiethnic studies. Because of the specificity of most gene × nutrient interactions, valid data are needed for nutrient intakes at the individual level. Most statistical adjustment efforts are designed to improve estimates of nutrient intake distributions in populations and are unlikely to solve this problem. An improved method of direct measurement of individual usual dietary intake that is unbiased across populations is urgently needed.
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Affiliation(s)
- Katherine L Tucker
- Department of Health Sciences, Northeastern University, Boston, MA 02115, USA.
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No evidence of decreased risk of colorectal adenomas with white meat, poultry, and fish intake: a meta-analysis of observational studies. Ann Epidemiol 2013; 23:215-22. [DOI: 10.1016/j.annepidem.2012.12.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Revised: 12/13/2012] [Accepted: 12/26/2012] [Indexed: 01/30/2023]
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Liu J, Wang J, Leng Y, Lv C. Intake of fruit and vegetables and risk of esophageal squamous cell carcinoma: a meta-analysis of observational studies. Int J Cancer 2013; 133:473-85. [PMID: 23319052 DOI: 10.1002/ijc.28024] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 12/05/2012] [Accepted: 12/13/2012] [Indexed: 02/06/2023]
Abstract
Quantification of the association between the intake of fruit and vegetables and risk of esophageal squamous cell carcinoma (ESCC) is controversial even though several studies have explored this association. We summarized the evidence from observational studies in categorical, linear and non-linear dose-response meta-analyses. Eligible studies published up to 31 July 2012 were retrieved via computer searches of MEDLINE and EMBASE as well as manual review of references. Random-effects models were used to calculate summary relative risks (SRRs) and the corresponding 95% confidence intervals (CIs). A total of 32 studies involving 10,037 cases of ESCC were included in this meta-analysis. The SRRs for the highest vs. lowest intake were 0.56 (95% CI: 0.45-0.69) for vegetable intake and 0.53 (95% CI: 0.44-0.64) for fruit intake (pheterogeneity <0.001 for both). Similar results were observed in a linear dose-response analysis. There was evidence of non-linear associations for intakes of fruit (pnon-linearity <0.001) and vegetables (pnon-linearity =0.041). There was no evidence of publication bias. These data support the hypothesis that intakes of vegetables and fruit may significantly reduce the risk of ESCC. Further investigation with prospective designs, validated questionnaires and good control of important confounders is warranted.
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Affiliation(s)
- Jun Liu
- Department of Radiation Oncology, Shanghai Chest Hospital, Shanghai Jiaotong University, Shanghai, People's Republic of China
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Effect of daily supplementation of fruits on oxidative stress indices and glycaemic status in type 2 diabetes mellitus. Complement Ther Clin Pract 2013; 19:97-100. [PMID: 23561067 DOI: 10.1016/j.ctcp.2012.12.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Accepted: 12/06/2012] [Indexed: 12/12/2022]
Abstract
This study sought to examine whether consumption of two low-calorie fruit/day for 3-months can effectively improve oxidative stress, anthropometry, blood pressure and glycaemic control in type 2 diabetes mellitus. Study involved 123 patients who were assigned to receive either standard care or with additional dietary therapy. Dietary intervention resulted in significant reduction in malondialdehyde, plasma glucose, glycated haemoglobin and improvement in antioxidants like vitamin C and reduced glutathione when compared to controls. Mean plasma levels of vitamin C increased by 64% (p < 0.001). There were no differences in waist circumference, waist-to-hip ratio, blood pressure, vitamin E and superoxide dismutase in the intervention group at follow-up. Diet rich in fruits can improve some antioxidants which are likely to reduce oxidative stress in type 2 diabetes. Regular consumption of fruits can lower the glycaemic status in these patients. The study supports the usefulness of plasma vitamin C as a biomarker for fruit intake.
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Fish consumption and risk of esophageal cancer and its subtypes: a systematic review and meta-analysis of observational studies. Eur J Clin Nutr 2013; 67:147-54. [PMID: 23321574 DOI: 10.1038/ejcn.2012.213] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND/OBJECTIVES Inconsistent results regarding the association between fish intake and risk of subtypes of esophageal cancer (EC), esophageal squamous cell carcinoma (ESCC) and esophageal adenocarcinoma (EAC), have been reported. To provide a quantitative assessment of this association, we summarized the evidence from observational studies. SUBJECTS/METHODS Relevant studies were identified in MEDLINE and EMBASE until 31 May, 2012. Summary relative risks (SRRs) with 95% confidence intervals (CIs) were pooled with a random-effects model. Between-study heterogeneity was assessed using the Cochran's Q and I(2) statistics. RESULTS A total of 24 studies (21 case-control and 3 cohort studies) were included in this systematic review and meta-analysis. The SRRs of ESCC were 0.81 (95% CI: 0.66-0.99) for those in the highest fish consumption category compared with those in the lowest consumption category, with significant heterogeneity among studies (P(heterogeneity)=0.007, I(2)=51.9%). Subgroup analysis suggested that a weak association between fish consumption and ESCC risk was shown in hospital-based case-control studies, but not in population-based case-control or cohort studies. According to high vs low analysis, fish consumption had no relationship with EAC risk (SRR=0.86, 95% CI: 0.61-1.22). CONCLUSIONS Our results suggest that fish consumption is not appreciably related to risk of both ESCC and EAC.
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Melkonian S, Argos M, Chen Y, Parvez F, Pierce B, Ahmed A, Islam T, Ahsan H. Intakes of several nutrients are associated with incidence of arsenic-related keratotic skin lesions in Bangladesh. J Nutr 2012; 142:2128-34. [PMID: 23077185 PMCID: PMC3497963 DOI: 10.3945/jn.112.165720] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Risk of skin lesions due to chronic arsenic exposure can be further affected by nutrient intake. We prospectively evaluated the association of nutrient intake and gender with incident skin lesions using data from the Health Effects of Arsenic Longitudinal Study (HEALS) in Araihazar, Bangladesh. Discrete time hazard models were used to estimate these effects in stratified analyses based on skin lesion severity. Overall, we observed significant associations between low intakes of various nutrients (retinol, calcium, fiber, folate, iron, riboflavin, thiamin, and vitamins A, C, and E) and skin lesion incidence, particularly for keratotic skin lesions. Associations for vitamins C and E showed significant linear trends. Gender-specific analyses revealed an inverse association between the lowest quartile of nutrient intake and keratotic skin lesion incidence for retinol equivalents, calcium, folate, iron, and fiber among women. Interactions by gender were observed for retinol equivalents (P-interaction = 0.03), calcium (P-interaction = 0.04), vitamin A (P-interaction = 0.03), and riboflavin (P-interaction = 0.04) with the incidence of keratotic skin lesions. Understanding differential susceptibility to skin lesion incidence based on nutrient intake will help researchers develop targeted interventions to prevent health consequences of arsenic poisoning in Bangladesh and beyond.
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Affiliation(s)
| | | | - Yu Chen
- Department of Environmental Medicine, New York University, NY; and
| | - Faruque Parvez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY
| | - Brandon Pierce
- Department of Health Studies, and,Departments of Medicine and Human Genetics and Comprehensive Cancer Center, The University of Chicago, Chicago, IL
| | - Alauddin Ahmed
- U-Chicago Research Bangladesh, Ltd, Mohakhali, Dhaka, Bangladesh
| | - Tariqul Islam
- U-Chicago Research Bangladesh, Ltd, Mohakhali, Dhaka, Bangladesh
| | - Habibul Ahsan
- Department of Health Studies, and,Departments of Medicine and Human Genetics and Comprehensive Cancer Center, The University of Chicago, Chicago, IL,To whom correspondence should be addressed. E-mail:
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Huang W, Han Y, Xu J, Zhu W, Li Z. Red and processed meat intake and risk of esophageal adenocarcinoma: a meta-analysis of observational studies. Cancer Causes Control 2012. [PMID: 23179661 DOI: 10.1007/s10552-012-0105-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
AIMS Inconsistent results relating dietary red and processed meat intake and risk of esophageal adenocarcinoma (EAC) have been reported. This article summarizes and quantifies the current evidence in a meta-analysis of observational studies. METHODS Electronic search of MEDLINE and EMBASE databases was performed to identify peer-reviewed manuscripts up to 31 May 2012. Random-effects models were used to pool study results. RESULTS Ten manuscripts from 3 cohort studies and 7 case-control studies were identified. The summary relative risks (SRRs) of EAC for highest versus lowest intake categories were 1.31 (95 % confidence intervals [CIs]: 1.05-1.64) for red meat consumption, and 1.41 (95 % CIs 1.09-1.83) for processed meat consumption. Subgroup analyses indicated that these positive relations were seen in case-control studies, but not in cohort studies. Based on dose-response analysis, similar results were found; the SRRs were 1.45(95 % CIs 1.09-1.93) per 100 g/day of red meat intake and 1.37 (95 % CIs 1.03-1.81) per 50 g/day of processed meat intake. CONCLUSIONS The results of this meta-analysis indicate that consumption of red and processed meat may be associated with increased risk of esophageal adenocarcinoma. More studies, particularly prospective studies, are needed.
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Affiliation(s)
- Wen Huang
- Department of Gastroenterology, Changhai Hospital of Second Military Medical University, 168 Changhai Road, Shanghai, China
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Carter P, Khunti K, Davies MJ. Dietary Recommendations for the Prevention of Type 2 diabetes: What Are They Based on? J Nutr Metab 2012; 2012:847202. [PMID: 22315675 PMCID: PMC3270422 DOI: 10.1155/2012/847202] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2011] [Accepted: 11/24/2011] [Indexed: 11/17/2022] Open
Abstract
Introduction. Type 2 diabetes is increasing in all populations and all age groups across the world. Areas undergoing rapid westernisation and rapid nutrition transition are seeing the greatest increases in prevalence suggesting that environmental factors are important. Studies from around the world have shown that dietary modification for the prevention of T2DM can be successful; however which dietary factors are important remains to be fully elucidated. The WHO, ADA, and Diabetes UK have developed guidelines for the prevention of T2DM even though the WHO states that data from lifestyle modification programmes does not allow for the disentanglement of dietary factors. Aim of Review. The aim of this focused review is to evaluate the current dietary recommendations for the prevention of T2DM. In addition we aim to explore the available evidence from both observation studies and clinical trials to determine whether these recommendations are appropriate.
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Affiliation(s)
- Patrice Carter
- Diabetes Research, Department of Cardiovascular Sciences, University of Leicester, Leicester LE1 5WW, UK
| | - Kamlesh Khunti
- Department of Health Sciences, University of Leicester, Leicester LE1 5WW, UK
| | - Melanie J. Davies
- Diabetes Research, Department of Cardiovascular Sciences, University of Leicester, Leicester LE1 5WW, UK
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Zhang S, Midthune D, Guenther PM, Krebs-Smith SM, Kipnis V, Dodd KW, Buckman DW, Tooze JA, Freedman L, Carroll RJ. A NEW MULTIVARIATE MEASUREMENT ERROR MODEL WITH ZERO-INFLATED DIETARY DATA, AND ITS APPLICATION TO DIETARY ASSESSMENT. Ann Appl Stat 2011; 5:1456-1487. [PMID: 21804910 PMCID: PMC3145332 DOI: 10.1214/10-aoas446] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In the United States the preferred method of obtaining dietary intake data is the 24-hour dietary recall, yet the measure of most interest is usual or long-term average daily intake, which is impossible to measure. Thus, usual dietary intake is assessed with considerable measurement error. Also, diet represents numerous foods, nutrients and other components, each of which have distinctive attributes. Sometimes, it is useful to examine intake of these components separately, but increasingly nutritionists are interested in exploring them collectively to capture overall dietary patterns. Consumption of these components varies widely: some are consumed daily by almost everyone on every day, while others are episodically consumed so that 24-hour recall data are zero-inflated. In addition, they are often correlated with each other. Finally, it is often preferable to analyze the amount of a dietary component relative to the amount of energy (calories) in a diet because dietary recommendations often vary with energy level. The quest to understand overall dietary patterns of usual intake has to this point reached a standstill. There are no statistical methods or models available to model such complex multivariate data with its measurement error and zero inflation. This paper proposes the first such model, and it proposes the first workable solution to fit such a model. After describing the model, we use survey-weighted MCMC computations to fit the model, with uncertainty estimation coming from balanced repeated replication.The methodology is illustrated through an application to estimating the population distribution of the Healthy Eating Index-2005 (HEI-2005), a multi-component dietary quality index involving ratios of interrelated dietary components to energy, among children aged 2-8 in the United States. We pose a number of interesting questions about the HEI-2005 and provide answers that were not previously within the realm of possibility, and we indicate ways that our approach can be used to answer other questions of importance to nutritional science and public health.
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Affiliation(s)
- Saijuan Zhang
- Department of Statistics Texas A&M University 3143 TAMU College Station, Texas 77843-3143 U.S.A
| | - Douglas Midthune
- Biometry Research Group Division of Cancer Prevention National Cancer Institute 6130 Executive Boulevard EPN-3131 Bethesda, Maryland 20892-7354 U.S.A
| | - Patricia M. Guenther
- Center for Nutrition Policy and Promotion U.S. Department of Agriculture 3101 Park Center Drive, Ste. 1034 Alexandria, Virginia 22302 U.S.A.
| | - Susan M. Krebs-Smith
- Applied Research Program Division of Cancer Control and Population Sciences National Cancer Institute 6130 Executive Boulevard, EPN-4005 Bethesda, Maryland 20892, U.S.A.
| | - Victor Kipnis
- Biometry Research Group Division of Cancer Prevention National Cancer Institute 6130 Executive Boulevard EPN-3131 Bethesda, Maryland 20892-7354 U.S.A
| | - Kevin W. Dodd
- Biometry Research Group Division of Cancer Prevention National Cancer Institute 6130 Executive Boulevard EPN-3131 Bethesda, Maryland 20892-7354 U.S.A
| | - Dennis W. Buckman
- Information Management Services, Inc. 12501 Prosperity Drive Silver Spring, Maryland 20904, U.S.A.
| | - Janet A. Tooze
- Department of Biostatistical Sciences Wake Forest University, School of Medicine Medical Center Boulevard Winston-Salem, North Carolina 27157, U.S.A.
| | - Laurence Freedman
- Gertner Institute for Epidemiology and Health Policy Research Sheba Medical Center Tel Hashomer 52161, Israel
| | - Raymond J. Carroll
- Department of Statistics Texas A&M University 3143 TAMU College Station, Texas 77843-3143 U.S.A
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Hawkesworth S, Dangour AD, Johnston D, Lock K, Poole N, Rushton J, Uauy R, Waage J. Feeding the world healthily: the challenge of measuring the effects of agriculture on health. Philos Trans R Soc Lond B Biol Sci 2010; 365:3083-97. [PMID: 20713404 PMCID: PMC2935110 DOI: 10.1098/rstb.2010.0122] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Agricultural production, food systems and population health are intimately linked. While there is a strong evidence base to inform our knowledge of what constitutes a healthy human diet, we know little about actual food production or consumption in many populations and how developments in the food and agricultural system will affect dietary intake patterns and health. The paucity of information on food production and consumption is arguably most acute in low- and middle-income countries, where it is most urgently needed to monitor levels of under-nutrition, the health impacts of rapid dietary transition and the increasing 'double burden' of nutrition-related disease. Food availability statistics based on food commodity production data are currently widely used as a proxy measure of national-level food consumption, but using data from the UK and Mexico we highlight the potential pitfalls of this approach. Despite limited resources for data collection, better systems of measurement are possible. Important drivers to improve collection systems may include efforts to meet international development goals and partnership with the private sector. A clearer understanding of the links between the agriculture and food system and population health will ensure that health becomes a critical driver of agricultural change.
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Affiliation(s)
- Sophie Hawkesworth
- Nutrition and Public Health Intervention Research Unit, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, UK
- Leverhulme Centre for Intergrative Research in Agriculture and Health London International Development Centre, 36 Gordon Square, London WC1H 0PD, UK
| | - Alan D. Dangour
- Nutrition and Public Health Intervention Research Unit, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, UK
- Leverhulme Centre for Intergrative Research in Agriculture and Health London International Development Centre, 36 Gordon Square, London WC1H 0PD, UK
| | - Deborah Johnston
- Leverhulme Centre for Intergrative Research in Agriculture and Health London International Development Centre, 36 Gordon Square, London WC1H 0PD, UK
- School of Oriental and African Studies, University of London, Thornhaugh Street, Russell Square, London, WC1H 0XG London, UK
| | - Karen Lock
- Nutrition and Public Health Intervention Research Unit, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, UK
- Leverhulme Centre for Intergrative Research in Agriculture and Health London International Development Centre, 36 Gordon Square, London WC1H 0PD, UK
| | - Nigel Poole
- Leverhulme Centre for Intergrative Research in Agriculture and Health London International Development Centre, 36 Gordon Square, London WC1H 0PD, UK
- School of Oriental and African Studies, University of London, Thornhaugh Street, Russell Square, London, WC1H 0XG London, UK
| | - Jonathan Rushton
- Leverhulme Centre for Intergrative Research in Agriculture and Health London International Development Centre, 36 Gordon Square, London WC1H 0PD, UK
- Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire AL9 7TA, UK
| | - Ricardo Uauy
- Nutrition and Public Health Intervention Research Unit, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, UK
- Leverhulme Centre for Intergrative Research in Agriculture and Health London International Development Centre, 36 Gordon Square, London WC1H 0PD, UK
| | - Jeff Waage
- Leverhulme Centre for Intergrative Research in Agriculture and Health London International Development Centre, 36 Gordon Square, London WC1H 0PD, UK
- School of Oriental and African Studies, University of London, Thornhaugh Street, Russell Square, London, WC1H 0XG London, UK
- London International Development Centre, 36 Gordon Square, London WC1H 0PD, UK
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Carter P, Gray LJ, Troughton J, Khunti K, Davies MJ. Fruit and vegetable intake and incidence of type 2 diabetes mellitus: systematic review and meta-analysis. BMJ 2010; 341:c4229. [PMID: 20724400 PMCID: PMC2924474 DOI: 10.1136/bmj.c4229] [Citation(s) in RCA: 475] [Impact Index Per Article: 33.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To investigate the independent effects of intake of fruit and vegetables on incidence of type 2 diabetes. DESIGN Systematic review and meta-analysis. DATA SOURCES Medline, Embase, CINAHL, British Nursing Index (BNI), and the Cochrane library were searched for medical subject headings and keywords on diabetes, prediabetes, fruit, and vegetables. Expert opinions were sought and reference lists of relevant articles checked. STUDY SELECTION Prospective cohort studies with an independent measure of intake of fruit, vegetables, or fruit and vegetables and data on incidence of type 2 diabetes. RESULTS Six studies met the inclusion criteria; four of these studies also provided separate information on the consumption of green leafy vegetables. Summary estimates showed that greater intake of green leafy vegetables was associated with a 14% (hazard ratio 0.86, 95% confidence interval 0.77 to 0.97) reduction in risk of type 2 diabetes (P=0.01). The summary estimates showed no significant benefits of increasing the consumption of vegetables, fruit, or fruit and vegetables combined. CONCLUSION Increasing daily intake of green leafy vegetables could significantly reduce the risk of type 2 diabetes and should be investigated further.
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Affiliation(s)
- Patrice Carter
- Diabetes Research, Department of Cardiovascular Sciences, University of Leicester, Leicester LE1 5WW.
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Alcohol intake and risk of colorectal cancer: results from the UK Dietary Cohort Consortium. Br J Cancer 2010; 103:747-56. [PMID: 20648013 PMCID: PMC2938250 DOI: 10.1038/sj.bjc.6605802] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Background: Epidemiological studies have suggested that excessive alcohol intake increases colorectal cancer (CRC) risk. However, findings regarding tumour subsites and sex differences have been inconsistent. Methods: We investigated the prospective associations between alcohol intake on overall and site- and sex-specific CRC risk. Analyses were conducted on 579 CRC cases and 1996 matched controls nested within the UK Dietary Cohort Consortium using standardised data obtained from food diaries as a main nutritional method and repeated using data from food frequency questionnaire (FFQ). Results: Compared with individuals in the lightest category of drinkers (>0–<5 g per day), the multivariable odds ratios of CRC were 1.16 (95% confidence interval (95% CI): 0.88, 1.53) for non-drinkers, 0.91 (95% CI: 0.67, 1.24) for drinkers with 5–<15 g per day, 0.90 (95% CI: 0.65, 1.25) for drinkers with 15–<30 g per day, 1.02 (95% CI: 0.66, 1.58) for drinkers with 30–<45 g per day and 1.19 (95% CI: 0.75, 1.91) for drinkers with ⩾45 g per day. No clear associations were observed between site-specific CRC risk and alcohol intake in either sex. Analyses using FFQ showed similar results. Conclusion: We found no significantly increased risk of CRC up to 30 g per day of alcohol intake within the UK Dietary Cohort Consortium.
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Nutrient database development: a historical perspective from the Framingham Nutrition Studies. ACTA ACUST UNITED AC 2010; 110:898-903. [PMID: 20497779 DOI: 10.1016/j.jada.2010.03.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2009] [Accepted: 10/16/2009] [Indexed: 11/23/2022]
Abstract
Food frequency questionnaires (FFQs) are commonly used in nutritional epidemiology to assess habitual eating habits. Development of an appropriate food and nutrient database is required for translating information derived from FFQs into estimates of nutrient intake, dietary quality, or for absolute or rank-ordered nutritional risk assessment. We discuss the procedures used recently in designing a historical nutrient database to analyze an FFQ administered in 1984-1988 to Framingham Offspring-Spouse Study members. This systematic approach should inform other research in the field. The self-administered 145-item Framingham FFQ is semi-quantitative with seven nonoverlapping response categories to determine annual consumption frequency. The database development process included selection of the US Department of Agriculture's Nutrient Database for Standard Reference as the primary raw data source, expansion of the 145 FFQ line items to code individual foods to assign nutrient values, a selection process to match foods to appropriate nutrition codes for nutrient information, and a statistical model to calculate nutrient intakes. The historical database contains 449 foods and nutrient data for all 29 nutrients available in 1985. The adequacy with which an FFQ can provide reliable diet assessment data depends on the integrity of the underlying database. We outlined a systematic protocol to derive usual dietary intake from an FFQ using a robust nutrient database that is appropriate for the Framingham Offspring-Spouse Study FFQ and its assessment time-frame. The database can be updated to accommodate changes in the food supply and eating behaviors and creates a foundation for future nutrition research.
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Munafò MR, Tilling K, Ben-Shlomo Y. Smoking status and body mass index: A longitudinal study. Nicotine Tob Res 2009; 11:765-71. [DOI: 10.1093/ntr/ntp062] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Freedman LS, Kipnis V, Schatzkin A, Potischman N. Methods of epidemiology: evaluating the fat-breast cancer hypothesis--comparing dietary instruments and other developments. Cancer J 2008; 14:69-74. [PMID: 18391610 DOI: 10.1097/ppo.0b013e31816a5e02] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Results from several large cohort studies that were reported 10 to 20 years ago seemed to indicate that the hypothesized link between dietary fat intake and breast cancer risk was illusory. In this article, we review several strands of more recent evidence that have emerged. These include two studies comparing the performance of dietary instruments used to investigate the dietary fat- breast cancer hypothesis, a large randomized disease prevention trial, a more recent meta-analysis of nutritional cohort studies, and a very large nutritional cohort study. Each of the studies discussed in this article suggests that a modest but real association between fat intake and breast cancer is likely. If the association is causative, it would have important implications for public health strategies in reducing breast cancer incidence. The evidence is not yet conclusive, but additional follow-up in the randomized trial, as well as efforts to improve dietary assessment methodology for cohort studies, may be sufficient to provide a convincing answer.
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Affiliation(s)
- Laurence S Freedman
- Gertner Institute for Epidemiology, Sheba Medical Center, Tel Hashomer, Israel.
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SMITH MB, PARNELL W. Teeth for life? Aspects of oral health status influencing the nutrition of older adults. Nutr Diet 2008. [DOI: 10.1111/j.1747-0080.2008.00272.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Bingham S, Luben R, Welch A, Low YL, Khaw KT, Wareham N, Day N. Associations between dietary methods and biomarkers, and between fruits and vegetables and risk of ischaemic heart disease, in the EPIC Norfolk Cohort Study. Int J Epidemiol 2008; 37:978-87. [PMID: 18579574 DOI: 10.1093/ije/dyn111] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Methods for assessing diet are prone to measurement error, which may be substantial in large cohort investigations. Biomarkers can be used as objective measures with which to compare estimates of nutritional exposure using different methods METHODS Cross sectional comparisons in 12 474 men and women of regression between biomarkers for vitamin C, sodium, potassium, fibre, carbohydrate, fat and phytoestrogens with intakes derived from food diaries and food frequency questionnaires (FFQ), and odds ratios for risk of ischaemic heart disease (IHD) by dietary and plasma vitamin C. RESULTS There were strong (P < 0.001) associations between biomarkers and intakes as assessed by food diary. Coefficients were markedly attenuated for data obtained from the FFQ, especially so for vitamin C, potassium and phytoestrogens (Z P < 0.05). Risk of IHD was associated with plasma vitamin C (P < 0.001) and intake of vitamin C and fruit and vegetables assessed by food diary (P quintile trends <0.001, 0.001) but not by the FFQ (P quintile trends 0.923, 0.186). CONCLUSIONS Nutritional data that reflect the findings from biomarkers reduce measurement error and will thus improve statistical power in studies of gene nutrient interactions in cohort studies.
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Affiliation(s)
- Sheila Bingham
- Medical Research Council, Dunn Human Nutrition Unit, Welcome Trust/MRC Building, Cambridge, UK.
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Fumagalli F, Pontes Monteiro J, Sartorelli DS, Vieira MNCM, de Lourdes Pires Bianchi M. Validation of a food frequency questionnaire for assessing dietary nutrients in Brazilian children 5 to 10 years of age. Nutrition 2008; 24:427-32. [PMID: 18343639 DOI: 10.1016/j.nut.2008.01.008] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2007] [Revised: 12/26/2007] [Accepted: 01/07/2008] [Indexed: 11/24/2022]
Abstract
OBJECTIVE This study aimed to assess the relative validity of a food frequency questionnaire (FFQ), previously validated to measure usual intakes in adults, for measuring dietary intakes in children 5 to 10 y of age. METHODS Dietary intakes were measured using an FFQ and a 3-d dietary record. Healthy children, 5 to 10 y old (n = 151), were recruited from public schools and asked to answer the questions in the FFQ and to provide non-consecutive 3-d dietary records based on reported estimated portion sizes. Paired sample t tests and Pearson's correlation coefficients were conducted to determine whether the two instruments reported similar values for energy and nutrients. The agreement of quartile categorization between the two instruments was also examined. RESULTS Estimated energy and nutrient intakes derived from the FFQ were significantly higher than those derived from 3-d dietary records. As expected, Pearson's correlations increased after adjusting for residual measurement error, presumably due to exclusion of the high within-person variability in intake of these nutrients. Moderate to high (r > 0.50) correlation coefficients were verified for some nutrients such as calcium, folate, vitamin B2, vitamin A, and vitamin C. CONCLUSION This FFQ, originally developed for use in adults, appears to overestimate usual energy and nutrient intakes in children 5 to 10 y of age. Further work is necessary to conduct a calibration study to establish adequate portion sizes before instrument adoption in this population.
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Affiliation(s)
- Fernanda Fumagalli
- Faculty of Pharmaceutics Sciences-Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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Bingham SA, Day N. Commentary: fat and breast cancer: time to re-evaluate both methods and results? Int J Epidemiol 2007; 35:1022-4. [PMID: 16931532 DOI: 10.1093/ije/dyl142] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- Sheila A Bingham
- MRC Centre for Nutrition and Cancer, Department of Public Health and Primary Care, Institute of Public Health, University of Cambridge School of Clinical Medicine, UK.
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Abstract
The European Prospective Investigation into Cancer and Nutrition (EPIC) was specifically designed to investigate the relationship between diet and cancer, with the aims of making a significant contribution to the accumulated scientific knowledge, trying to overcoming limitations of previous study. We present the most relevant results obtained so far for the most frequent cancer sites. EPIC is a multicenter prospective study carried out in 23 centers from 10 European countries: Denmark, France, Germany, Greece, Italy, the Netherlands, Norway, Spain, Sweden, and the United Kingdom, including 519,978 subjects (366,521 women and 153,457 men), most aged 35-70 years. Consumption of fruit is negatively associated with cancer of the lung but probably not with prostate cancer and breast cancer. Consumption of vegetables, mainly onion and garlic, probably reduces the risk of the intestinal stomach cancer but probably is not associated with cancer of the lung, prostate, and breast cancer. Consumption of red and processed meat is positively associated with colorectal cancer and with non-cardia stomach cancer in those infected by Helicobacter pylori. Fish intake is negatively associated with colorectal cancer risk. High alcohol intake increases the risk of breast cancer. These first results from the EPIC study on main food groups and most frequent tumors have made a significant contribution to the already accumulated evidence and, in combination with data from other prospective studies, provide the scientific knowledge for appropriate public health strategies aimed at reducing the global cancer burden.
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Affiliation(s)
- Carlos A Gonzalez
- Department of Epidemiology, Institut Català d'Oncologia, L'Hospitalet, Barcelona.
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Abstract
Cancer is a disease that is characterized by the loss of genetic control over cell growth and proliferation, mainly as a result of the exposure to environmental factors. Cessation of smoking and a high consumption of fruits and vegetables are the most important means of reducing the risk of cancer in our society. Like fruits and vegetables, nuts are a source of vegetable protein, monounsaturated fatty acids, vitamin E, phenolic compounds, selenium, vegetable fibre, folic acid and phytoestrogens. There are numerous mechanisms of action by which these components can intervene in the prevention of cancer, although they have not been fully elucidated. There are very few epidemiological studies analyzing the relationship between nuts consumption and risk of cancer. One of the greatest difficulties in interpreting the results is that the consumption of nuts, seeds and legumes are often presented together. The most commonly studied location is the colon/rectum, an organ in which the effect of nuts is biologically plausible. Although the results are not conclusive, a protective effect on colon and rectum cancer is possible. Likewise, some studies show a possible protective effect on prostate cancer, but there is insufficient data on other tumour locations. New epidemiological studies are required to clarify the possible effects of nuts on cancer, particularly prospective studies that make reliable and complete estimations of their consumption and which make it possible to analyse their effects independently of the consumption of legumes and seeds.
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Affiliation(s)
- Carlos A González
- Department of Epidemiology and Cancer Registry, Catalan Institute of Oncology, Barcelona, Spain.
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