Knowledge regarding human papillomavirus and cervical cancer prevention among medical students from Chulalongkorn University in Thailand

BACKGROUND

Cervical cancer is one of the leading causes of death among women in Thailand. General practitioners, within their primary healthcare role, play a vital role in the cervical cancer screening program, as they are the healthcare professionals most easily accessible to the general population. This study aims to determine the level of knowledge of cervical cancer and human papillomavirus (HPV) infection, HPV vaccination, and cervical cancer screening among last-year medical students.

METHODS

A cross-sectional study was conducted among sixth-year medical students using an electronic self-administered questionnaire. The two-part questionnaire comprised demographic data and 12 true/false questions that assessed knowledge regarding HPV infection, HPV vaccination, and cervical cancer screening recommendations. Pilot testing revealed a high Cronbach's alpha and test-retest reliability coefficient.

RESULTS

A 67% response rate was achieved. Among the 198 respondents, only one (0.5%) student correctly answered over 80% of the questions while most respondents (172, 71.7%) correctly answered less than 60% of the questions. Less than half of the respondents correctly identified crucial aspects such as the primary cause of cervical cancer, recommended vaccination age, cytology sensitivity compared to HPV testing, and the recommended screening frequency for average-risk women.

CONCLUSIONS

This study highlights a significant lack of comprehension among Thai medical students concerning HPV infection, vaccination, and cervical cancer screening guidelines. Encouraging educational enhancement, effective communication, and heightened awareness of these crucial topics within the medical school curriculum are imperative.

Self- and physician-collected high-risk human papillomavirus (HPV) testing to detect high-grade cervical lesions among Thai women

OBJECTIVE

We compared the performance of high-risk human papillomavirus (HPV) messenger RNA testing of physician- and self-collected specimens for detecting histological grade 2 or higher cervical intraepithelial neoplasia (CIN) among women who visited a colposcopy clinic in Thailand.

METHODS

From January 2022 to April 2022, 500 women participated in this cross-sectional multicenter study; 494 had complete data and valid specimen results. The participants were women who attended any one of the 10 participating institutes' colposcopy clinics due to abnormal cytology, positive high-risk HPV testing, or for follow-up. Participants used a self-sampling Aptima Multitest Swab specimen collection kit to self-collect vaginal samples before physicians biopsied the cervix during the colposcopic examination. The self- and physician-collected specimens were tested for high-risk HPV messenger RNA using Aptima nucleic acid amplification assays. Cervical tissues were collected during colposcopic-directed biopsy from the most severe lesion or a random biopsy and endocervical curettage specimen if no lesion was detected.

RESULTS

We detected high-risk HPV messenger RNA in 75.4% of self-collected specimens and 70.6% of physician-collected specimens. The prevalence of histological grade 2 or higher CIN from cervical histology was 25.1% (n=124). For self-collected specimens, the sensitivity and specificity of high-risk HPV messenger RNA for grade 2 or higher CIN were 87.0% (95% CI 79.7% to 92.4%; n=108) and 28.5% (95% CI 24.0% to 33.4%). For physician-collected specimens, the sensitivity and specificity of high-risk HPV messenger RNA for grade 2 or higher CIN were 90.2% (95% CI 83.6% to 94.9%; n=112) and 36.1% (95% CI 31.2% to 41.3%).

CONCLUSIONS

Self-collected specimens for high-risk HPV messenger RNA testing demonstrated good sensitivity and negative predictive value for detecting grade 2 or higher CIN in Thai women attending the participating institutes' colposcopy clinics. Self-collected samples performed similarly to physician-collected ones.

Toward 70% cervical cancer screening coverage: Technical challenges and opportunities to increase access to human papillomavirus (HPV) testing

The World Health Organization (WHO) has called for the elimination of cervical cancer as a public health problem. Cervical cancer screening through human papillomavirus (HPV) testing is a core component of the strategy for elimination, with a set target of screening 70% of women twice in their lifetimes. In this review, we discuss technical barriers and opportunities to increase HPV screening globally.

Cervical cancer prevention program in Nepal: A comprehensive "train the trainer" approach

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Background: Cervical cancer is the leading cause of cancer and cancer-related deaths among women in Nepal, due in part to a lack of access to screening and limited medical providers trained to diagnose and treat women with preinvasive cervical disease. Cancer Care Nepal has partnered with The University of Texas MD Anderson Cancer Center (MD Anderson) and the American Society of Clinical Oncology (ASCO) to implement a ‘train the trainer’ (TOT) program to teach visual inspection with acetic acid (VIA), colposcopy, cervical biopsy, cryotherapy, thermal ablation, and loop electrosurgical excision procedure (LEEP). Methods: An initial cervical cancer prevention course was held in Kathmandu, Nepal in November 2019, supported by ASCO and with faculty from Civil Service Hospital, Bhaktapur Cancer Hospital, and National Academy of Medical Sciences and MD Anderson. As a continuation of this program, a TOT course was implemented for local specialists from five participating institutions throughout Nepal to learn how to deliver these trainings. Each participating institution then holds their own local course for nurses and doctors in their region. The training is complemented with monthly Project ECHO (Extension for Community Healthcare Outcomes) telementoring videoconferences. Results: The program was launched in November 2021. To date, two TOT training courses (2-day duration) have been held for clinicians from the 5 participating regions. Due to COVID-19 pandemic travel restrictions, didactic lectures were held virtually with MD Anderson and ASCO staff and included epidemiology of cervical cancer, screening guidelines, colposcopy, and treatment of cervical dysplasia. This was followed by hands-on training using simulation models to teach VIA, colposcopy, ablation and LEEP, led by the Nepalese faculty who had participated in the 2019 course. There were 41 participants in total (23 in the first course and 18 in the second course), including 21 gynecologists, 4 gynecologic oncologists, 1 medical oncologist, 1 general practitioner, and 14 nurses. 39 participants (73%) completed both the pre- and post- survey results. 86% of respondents from the first course and 100% of respondents from the second course reported that they intended to change their practice as a result of knowledge gained from the course. In addition, Cancer Care Nepal became a new hub for Project ECHO and held its first session in January 2022, with 20 participants representing two regions. The specialists from each of the 5 participating sites will be holding local courses for doctors and nurses in their respective regions throughout 2022. Conclusions: Our work shows that the TOT strategy can widen the reach of training in cervical cancer prevention in Nepal. Despite travel restrictions during the COVID-19 pandemic, global health training and mentoring can continue, though they require adaptions and use of virtual platforms.

Hands-On Training Courses for Cervical Cancer Screening, Diagnosis, and Treatment Procedures in Low- and Middle-Income Countries

In 2018, there were approximately 570,000 new cases of cervical cancer worldwide. More than 85% of cases occurred in low- and middle-income countries (LMICs), primarily because of poor access to screening and a limited number of medical providers trained to diagnose and treat cervical precancerous lesions. Our objective was to provide locally arranged, hands-on training courses for medical providers in LMICs to learn to perform cervical cancer screening, diagnosis, and treatment procedures. The courses included didactic lectures and hands-on training stations using low-cost simulation models developed by bioengineers and students at Rice University in Houston, TX, United States, and the Malawi Polytechnic in Blantyre, Malawi. The hands-on training stations included visual inspection with acetic acid (VIA), colposcopy, cervical biopsy, endocervical curettage, loop electrosurgical excision procedure (LEEP), and thermal ablation. Provider pre- and postcourse confidence levels in performing the procedures were evaluated. From February 2017 to January 2020, we arranged 15 hands-on training courses in seven cities across six countries (El Salvador, Mozambique, Trinidad and Tobago, Lesotho, Malawi, and Nepal). Overall, there were 506 participants. The average number of participants per course was 38 (range 19-92). The participants included doctors, nurses, and midwives. The course duration varied from 1 to 3 days. Increased confidence in performing VIA, colposcopy and cervical biopsy, ablation, and LEEP was reported by 69%, 71%, 61%, and 76% of participants, respectively. Our findings suggest that locally arranged, hands-on cervical cancer prevention training courses in LMICs can improve provider confidence in performing cervical cancer screening, diagnosis, and treatment procedures. These courses are part of a larger strategy to build local capacity for delivering and improving cervical cancer prevention services in LMICs.

Hands-on training courses improved provider confidence in cervical cancer screening, diagnostic and treatment in LMICs.

Efficacy of Curcuminoids in managing postoperative pain after total laparoscopic hysterectomy: A randomized controlled, open-label trial

BACKGROUND AND AIMS

Curcuminoids, which are substances extracted from turmeric (Curcuma longa), have anti-inflammatory and analgesic effects and a good safety profile. This study aimed to evaluate the clinical efficacy of curcuminoid extracts on reducing pain among patients who underwent laparoscopic hysterectomy. Experimental procedure: From November 2016 to December 2017, 98 participants were included in this clinical trial, and they were randomly assigned to the experimental and control arms according to blocks of four. The intraoperative findings did not significantly differ between the two groups. The experimental group received one tablet of curcuminoid extract 250 mg four times a day on postoperative days 1-3. Pain was evaluated at 24 and 72 h postoperatively using a 10-point visual analog scale (VAS).

RESULTS AND CONCLUSION

The mean visual analog scale (VAS) scores at 24 h after surgery were 4.9 in the experimental group and 4.3 in the control group. Hence, the results did not significantly differ (p = 0.129). The mean VAS scores at 72 h after surgery were 1.8 in the experimental group and 2.8 in the control group (p = 0.001). The side effects in both groups were similar. Hence, curcuminoids can be an effective supplement for reducing pain after laparoscopic hysterectomy. The conclusion from this study is, that curcuminoids may be an effective supplement to reduce postoperative pain following laparoscopic hysterectomy.

Accuracy of Smartphone Images of the Cervix After Acetic Acid Application for Diagnosing Cervical Intraepithelial Neoplasia Grade 2 or Greater in Women With Positive Cervical Screening: A Systematic Review and Meta-Analysis

PURPOSE

Smartphones are used in cervical screening for visual inspection after acetic acid or Lugol's iodine (VIA/VILI) application to capture and share images to improve the sensitivity and interobserver variability of VIA/VILI. We undertook a systematic review and meta-analysis assessing the diagnostic accuracy of smartphone images of the cervix at the time of VIA/VILI (termed S-VIA) in the detection of precancerous lesions in women undergoing cervical screening.

METHODS

This systematic review was conducted in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Studies from January 1, 2010, to June 30, 2020, were assessed. MEDLINE/PubMed, Embase, CINAHL, Cochrane, and LILACS were searched. Cohort and cross-sectional studies were considered. S-VIA was compared with the reference standard of histopathology. We excluded studies where additional technology was added to the smartphone including artificial intelligence, enhanced visual assessment, and other algorithms to automatically diagnose precancerous lesions. The primary outcome was the accuracy of S-VIA for the diagnosis of cervical intraepithelial neoplasia grade 2 or greater (CIN 2+). Data were extracted, and we plotted the sensitivity, specificity, negative predictive value, and positive predictive value of S-VIA using forest plots. This study was prospectively registered with The International Prospective Register of Systematic Reviews:CRD42020204024.

RESULTS

Six thousand three studies were screened, 71 full texts assessed, and eight studies met criteria for inclusion, with six included in the final meta-analysis. The sensitivity of S-VIA for the diagnosis of CIN 2+ was 74.56% (95% CI, 70.16 to 78.95; I² 61.30%), specificity was 61.75% (95% CI, 56.35 to 67.15; I² 95.00%), negative predictive value was 93.71% (95% CI, 92.81 to 94.61; I² 0%), and positive predictive value was 26.97% (95% CI, 24.13 to 29.81; I² 61.3%).

CONCLUSION

Our results suggest that S-VIA has accuracy in the detection of CIN 2+ and may provide additional support to health care providers delivering care in low-resource settings.

American Society of Clinical Oncology (ASCO) Cervical Cancer Prevention Program: A Hands-On Training Course in Nepal

Cervical cancer is the leading cause of death among women in Nepal. The American Society of Clinical Oncology (ASCO) and The University of Texas MD Anderson Cancer Center collaborated with international and local experts to hold a cervical cancer prevention course in Nepal in November 2019. The course included didactic lectures and a hands-on workshop. The didactic lectures included the epidemiology of cervical cancer globally and locally, cervical cancer screening guidelines, human papillomavirus vaccination, colposcopy and visual inspection with acetic acid (VIA), cervical dysplasia, and cervical cancer treatment. The hands-on workshop consisted of four stations: (1) VIA; (2) colposcopy, cervical biopsy, and endocervical curettage; (3) thermal ablation; and (4) loop electrosurgical excision procedure (LEEP). A train-the-trainer model short course was held by the international faculty to assist six local faculty to become familiar with the instruments, procedures, and models used in the hands-on training stations. Forty-two people (84% gynecologist, 8% radiation oncologist, and 8% other) attended the course. Following the course, the international faculty visited the regional hospitals for additional educational activities. Increased knowledge in cervical cancer screening guidelines and ability in performing VIA, colposcopy and cervical biopsy, thermal ablation, and LEEP were reported by 89%, 84%, 84%, 87%, and 84% of participants, respectively, from the postcourse on-site evaluations. From the 6-month follow-up survey, all respondents reported that they had made practice changes based on what they learned in the course and had implemented or tried to implement the cervical cancer screening guidelines presented at the course. In conclusion, the course evaluations suggested an improvement in participants' ability to perform cervical cancer screening and diagnostic procedures and reported the changes in practices after training.

The Capulana study: a prospective evaluation of cervical cancer screening using human papillomavirus testing in Mozambique

BACKGROUND

Cervical cancer is the leading cause of cancer and related deaths among women in Mozambique. There is limited access to screening and few trained personnel to manage women with abnormal results. Our objective was to implement cervical cancer screening with human papillomavirus (HPV) testing, with navigation of women with abnormal results to appropriate diagnostic and treatment services.

METHODS

We prospectively enrolled women aged 30-49 years living in Maputo, Mozambique, from April 2018 to September 2019. All participants underwent a pelvic examination by a nurse, and a cervical sample was collected and tested for HPV using the careHPV test (Qiagen, Gaithersburg, Maryland, USA). HPV positive women were referred for cryotherapy or, if ineligible for cryotherapy, a loop electrosurgical excision procedure. Women with findings concerning for cancer were referred to the gynecologic oncology service.

RESULTS

Participants (n=898) had a median age of 38 years and 20.3% were women living with the human immunodeficiency virus. HPV positivity was 23.7% (95% confidence interval 21.0% to 26.6%); women living with human immunodeficiency virus were twice as likely to test positive for HPV as human immunodeficiency virus negative women (39.2% vs 19.9%, p<0.001). Most HPV positive women (194 of 213, 91.1%) completed all steps of their diagnostic work-up and treatment. Treatment included cryotherapy (n=158, 77.5%), loop electrosurgical excision procedure (n=30, 14.7%), or referral to a gynecologist or gynecologic oncologist (n=5, 2.5%). Of eight invasive cervical cancers, 5 (2.8%) were diagnosed in women living with human immunodeficiency virus and 3 (0.4%) in human immunodeficiency virus negative women (p=0.01).

CONCLUSION

Cervical cancer screening with HPV testing, including appropriate follow-up and treatment, was feasible in our study cohort in Mozambique. Women living with human immunodeficiency virus appear to be at a significantly higher risk for HPV infection and the development of invasive cervical cancer than human immunodeficiency virus negative women.

Evaluation of PARP and PDL-1 as potential therapeutic targets for women with high-grade neuroendocrine carcinomas of the cervix

OBJECTIVES

Women with recurrent high-grade neuroendocrine cervical cancer have few effective treatment options. The aim of this study was to identify potential therapeutic targets for women with this disease.

METHODS

Specimens from patients with high-grade neuroendocrine carcinomas of the cervix were identified from pathology files at MD Anderson Cancer Center. Immunohistochemical stains for PD-L1 (DAKO, clone 22-C3), mismatch repair proteins (MLH1, MSH2, MSH6, PMS2), somatostatin, and Poly (ADP-ribose) polymerase (PARP) were performed on sections from formalin-fixed paraffin-embedded tissue blocks. Nuclear PARP-1 staining was quantified using the H-score with a score of <40 considered low, 40-100 moderate, and ≥100 high.

RESULTS

Forty pathologic specimens from patients with high-grade neuroendocrine carcinomas of the cervix were examined (23 small cell, 5 large cell, 3 high-grade neuroendocrine, not otherwise specified, and 9 mixed). The mean age of the cohort was 43 years and the majority of patients (70%) were identified as white non-Hispanic. All 28 (100%) samples tested stained for mismatch repair proteins demonstrated intact expression, suggesting they were microsatellite stable tumors. Of the 31 samples tested for PD-L1 expression, only two (8%) of the 25 pure high-grade neuroendocrine carcinomas were positive whereas three (50%) of the six mixed carcinoma tumors tested positive. Of the 11 small cell specimens tested for PARP-1, 10 (91%) showed PARP expression with six (55%) demonstrating high expression and four (36%) showing moderate expression. Somatostatin staining was negative in 18 of 19 small cell cases (95%).

CONCLUSIONS

Pure high-grade neuroendocrine cervical carcinomas were microsatellite stable and overwhelmingly negative for PD-L1 expression. As the majority of tumors tested expressed PARP-1, inclusion of PARP inhibitors in future clinical trials may be considered.

Acceptability of Self-Sample Human Papillomavirus Testing Among Thai Women Visiting a Colposcopy Clinic

We offered self-sampling devices to 250 women who visited the colposcopy clinic at Chulabhorn Hospital, Bangkok, Thailand from March 1 to June 30, 2015. Participants received instruction about the vaginal self-sample method and collected the specimen themselves, before being examined by the physician who obtained a conventional cervical specimen. Participating women's attitudes and feelings regarding the self-sample method were explored using a short questionnaire. Of the 247 eligible women, more than 90% of participants rated the self-sample method as very good to excellent for convenience, comfort, and safety. In addition, 80% of participants reported the overall experience of using the self-sample device was very good to excellent compared with the physician-collected method. Self-sample HPV testing appears to be highly accepted and perceived as convenient, comfortable, and safe. More studies on self-sample HPV testing should be conducted in Thailand to investigate this as an alternative method of cervical cancer screening, particularly among women who do not attend the screening program.

Efficacy of curcuminoids for reducing postoperative pain after laparoscopic gynecologic surgery: A pilot randomized trial

Background Curcuminoids, which are substances extracted from turmeric, have been proved to have anti-inflammatory and analgesic effects along with a good safety profile. This study aimed to evaluate the clinical efficacy of curcuminoids for reducing postoperative pain in patients who undergo laparoscopic gynecologic surgery. Methods From November 2016 to December 2017, participants were randomly assigned, by blocks of four, to the intervention and control arms of the study. Altogether, 60 patients who were to undergo laparoscopic gynecologic surgery at our institution were enrolled. Intraoperative findings were not significantly different between the two groups. One tablet of curcuminoid extract 250 mg was given to patients in the intervention group four times a day on postoperative days 1-3. Pain was evaluated at 24 and 72 h postoperatively using a 10-point visual analog scale (VAS). Results The median VAS score 24 h after surgery was 3 (1-6) in the intervention group and 4.5 (3-7) in the control group, with the difference reaching statistical significance (p=0.001). The median VAS at 72 h after surgery was 1 (0-2) in the intervention group and 2 (1-5) in the control group (p<0.001). Conclusion Curcuminoids may be an effective supplement to reduce pain severity postoperatively following laparoscopic gynecologic surgery. Trial Registration TCTR20180215001 www.clinicaltrials.in.th.

End-of-life symptoms and interventions among women with gynecologic cancers in a tertiary-care hospital in Thailand

OBJECTIVES

Studies have shown improved patient quality of life with supportive care rather than aggressive treatment at the end of life. This study evaluated the symptoms that patients in Thailand with gynecologic cancers experienced and the interventions that they received at the end of life.

METHODS

The medical records of patients admitted to a tertiary cancer center in Thailand who died in the hospital from gynecologic malignancies between January 1, 2011 and December 31, 2016 were reviewed. Inclusion criteria were patients who had been been diagnosed with gynecologic cancers (ovarian, endometrial, cervical, vulvar, or peritoneal cancers or uterine sarcomas) and had died in the hospital during that period. Patients whose medical records were incomplete or unavailable were excluded from the study. Data on demographics, symptoms, interventions, and end-of-life care were collected.

RESULTS

A total of 159 patients were included in this analysis. The mean age at death was 54.3 (range 15-91) years. Over half (54.7%) of the patients were diagnosed with ovarian or peritoneal cancer, 26.4% with uterine cancer or sarcoma, 16.4% with cervical cancer, and 1.3% with dual primary cancers. Symptoms at time of admission were poor oral intake (68.6%), abdominal distention or discomfort (63.5%), pain (42.8%), nausea or vomiting (35.2%), and fever or signs of infection (27.0%). The mean number of hospitalizations during the last 6 months was 3.6. Thirty-six patients (22.6%) had major surgery during the last 6 months of life, with 14 patients (8.8%) having it performed during their last admission before death. The mean length of the last hospital stay was 22.3 (range 6-31) days, and 61 patients (38.4%) were admitted to the intensive care unit. Eleven patients (6.9%) had chemotherapy in their last 14 days of life and 10 (6.3%) received cardiopulmonary resuscitation. Almost all patients (153, 96.2%) had do-not-resuscitate (DNR) consents. The mean time between the DNR consent and death was 6.3±9.7 days.

CONCLUSION

Multiple hospital admissions, aggressive treatments, and invasive procedures were common among patients with gynecologic cancer at the end of life. Better symptom management, end-of-life preparation, and communication are needed to enhance patients' quality of life in Thailand.

Urinary biomarkers for the diagnosis of cervical cancer by quantitative label-free mass spectrometry analysis

Due to the invasive procedure associated with Pap smears for diagnosing cervical cancer and the conservative culture of developing countries, identifying less invasive biomarkers is of great interest. Quantitative label-free mass spectrometry was performed to identify potential biomarkers in the urine samples of patients with cervical cancer. This technique was used to study the differential expression of urinary proteomes between normal individuals and cancer patients. The alterations in the levels of urinary proteomes in normal and cancer patients were analyzed by Progenesis label-free software and the results revealed that 60 proteins were upregulated while 73 proteins were downregulated in patients with cervical cancer. This method could enrich high molecular weight proteins from 100 kDa. The protein-protein interactions were obtained by Search Tool for the Retrieval of Interacting Genes/Proteins analysis and predicted the biological pathways involving various functions including cell-cell adhesion, blood coagulation, metabolic processes, stress response and the regulation of morphogenesis. Two notable upregulated urinary proteins were leucine-rich α-2-glycoprotein (LRG1) and isoform-1 of multimerin-1 (MMRN1), while the 3 notable downregulated proteins were S100 calcium-binding protein A8 (S100A8), serpin B3 (SERPINB3) and cluster of differentiation-44 antigen (CD44). The validation of these 5 proteins was performed by western blot analysis and the biomarker sensitivity of these proteins was analyzed individually and in combination with receiver operator characteristic curve (ROC) analysis. Quantitative mass spectrometry analysis may allow for the identification of urinary proteins of high molecular weight. The proteins MMRN1 and LRG1 were presented, for the first time, to be highly expressed urinary proteins in cervical cancer. ROC analysis revealed that LRG1 and SERPINB3 could be individually used, and these 5 proteins could also be combined, to detect the occurrence of cervical cancer.

Agreement of self- and physician-collected samples for detection of high-risk human papillomavirus infections in women attending a colposcopy clinic in Thailand

Objective

To study the concordance between vaginal self- and endocervical physician-collected high-risk (hr) HPV testing in Thai women who attended a colposcopy clinic. Vaginal samples were obtained by self-sampling with a dry brush before endocervical samples were obtained by physicians. Both specimens were analyzed for hrHPV by Cobas4800 HPV test.

Results

Of the 247 pairs of samples, overall hrHPV prevalence from self- and physician-collected samples was 41.3 and 36.0%, respectively. The overall agreement between the methods was 74.5% with κ 0.46 (P < 0.001). Our study revealed moderate agreement between self- and physician-collected methods for hrHPV testing.

A population-based study of cervical cytology findings and human papillomavirus infection in a suburban area of Thailand

Despite the high incidence of cervical cancer in Thailand, large population-based studies on cervical cytology and HPV prevalence and genotype distribution are rare. This study aimed to determine cervical cytology results and the prevalence and distribution of HPV among Thai females in Bangkhayaeng subdistrict, Pathumthani province, Thailand. Of 4681 female inhabitants, aged 20–70 years, 1523 women finally participated in the study. Cervical samples using liquid-based cytology were collected during February–August 2013 and analyzed for HPV genotype by the LINEAR ARRAY® HPV Genotyping Test (Roche, USA). All participants with abnormal cytology or HPV positivity underwent colposcopy and biopsy. Of 1523 eligible women, 4.1% had abnormal cytology including ASC-US (2.4%), LSIL (1.0%), and HSIL (0.5%). The HPV infection rate was 13.7%. The prevalences of high-risk, probable high-risk, and low-risk HPV types were 5.6%, 3.5%, and 6.8%, respectively. The most common high-risk HPV types detected were HPV-16 (1.31%), HPV-51 (1.25%), and HPV-52 (1.25%). The most common probable high-risk and low-risk HPV types detected were HPV-72 (1.51%), HPV-62 (1.38%), and HPV-70 (1.18%). The rates of CIN2–3 and cancer in this cohort were 1.4% and 0.3%, respectively. In conclusion, HPV prevalence in this study was lower than reported in studies conducted in Western countries or other Asia countries, despite the high prevalence of CIN2 + and cancer. HPV type screening results of the general population in Bangkhayaeng subdistrict were similar to those reported in other countries, with HPV-16 the most common type. However, higher frequencies of HPV-51 and HPV-52 were observed. Despite the availability of a free screening program in this area, the participation rate remains low.

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The largest population-based study using liquid-based cytology and Linear array HPV genotyping in Thailand.

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Low prevalence of high risk HPV in Thailand despite high incidence of cervical cancer.

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Higher ratio of HPV-51, HPV-52 after HPV-16 in this cohort.

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Almost abnormal results underwent colposcopy and biopsy with histological confirmation.

Knowledge, Attitudes and Behavior of Bangkok Metropolitan Women Regarding Cervical Cancer Screening

PURPOSE

To assess knowledge, attitudes and cervical cancer screening behavior of Bangkok Metropolitan women.

MATERIALS AND METHODS

Thai women, aged 25-to-65 years old, having lived in Bangkok for 5 years or more were invited to participate in the study. After signing informed consent, all women were asked to complete a self-questionnaire (Thai language) with literate assistance if needed. The questionnaire was divided into 3 parts: (I) demographic data; (II) knowledge about cervical cancer screening; and (III) behavior and attitudes, towards cervical cancer screening. Adequate screening was defined as women who had ≥two cervical cancer screening tests except women aged 25-30 years who may have only one screening, and the last screen was within 5 year or had had regular screening.

RESULTS

Of 4,339 women, there were 1,857 (42.8%) with adequate screening and 2,482 (57.2%) with inadequate screening. Significant factors associated with inadequate screening included age < 45 years, pre-menopausal status, family monthly income <625 USD, no reported sexual intercourse, nulliparous, no knowledge, lack of awareness and poor attitudes. Three major reasons provided by women for inadequate screening were no symptoms (54.4%), fear of pain (33.2%), and embarrassment (34.6%).

CONCLUSIONS

Personal features, knowledge, and attitudes influence screening behavior of Bangkok Metropolitan women. The three most common reasons of women for not undergoinging screening are no symptoms, fear of pain, and embarrassment. These factors should be the focus of attention to improve coverage of cervical cancer screening in Bangkok.

Prevalence and Associated Factors of Abnormal Cervical Cytology and HighRisk HPV DNA among Bangkok Metropolitan Women

BACKGROUND

Many strategies are required for cervical cancer reduction e.g. provision of education cautious sexual behavior, HPV vaccination, and early detection of preinvasive cervical lesions and invasive cancer. Basic health data for cervical cytology/ HPV DNA and associated factors are important to make an appropriate policy to fight against cervical cancer.

AIMS

To assess the prevalence of abnormal cervical cytology and/or HPV DNA and associated factors, including sexual behavior, among Bangkok Metropolitan women.

MATERIALS AND METHODS

Thai women, aged 25to65 years old, had lived in Bangkok for ≥5 years were invited into the study. Liquidbased cervical cytology and HPV DNA tests were performed. Personal data were collected.

MAIN OUTCOMES MEASURES

Rates of abnormal cytology and/ or highrisk HPV (HRHPV) and factors associated with abnormal test(s) were studied.

RESULTS

Abnormal cytology and positive HRHPV were found in 6.3% (279/4442 women) and 6.7% (295/4428), respectively. The most common abnormal cytology was ASCUS (3.5%) while the most common HRHPV genotype was HPV 16 (1.4%) followed by HPV 52 (1.0%), HPV 58 (0.9%), and HPV 18 and HPV 51 at equal frequency (0.7%). Both tests were abnormal in 1.6% (71/4428 women). Rates of HRHPV detection were directly associated with severity of abnormal cytology: 5.4% among normal cytology and 13.0%, 30.8%, 40.0%, 39.5%, 56.3% and 100.0% among ASCUS, ASCH, AGCNOS, LSIL, HSIL, and SCC, respectively. Some 5% of women who had no HRHPV had abnormal cytology, in which 0.3% had ≥ HSIL. Factors associated with abnormal cytology or HRHPV were: age ≤40 years, education lower than (for cytology) or higher than bachelor for HRHPV), history of sexual intercourse, and sexual partners ≥2.

CONCLUSIONS

Rates for abnormal cytology and HRHPV detection were 6.3% and 6.7% HRHPV detection was directly associated with severity of abnormal cytology. Significant associated factors were age ≤40 years, lower education, history of sexual intercourse, and sexual partners ≥2.

Genotypic distribution of human papillomavirus (HPV) and cervical cytology findings in 5906 Thai women undergoing cervical cancer screening programs

Background

Cervical cancer is the major cause of morbidity and mortality in Thai women. Nevertheless, the preventive strategy such as HPV vaccination program has not been implemented at the national level. This study explored the HPV prevalence and genotypic distribution in a large cohort of Thai women.

Methods

A hospital-based cervical cancer screening program at Chulabhorn Hospital, Bangkok and a population-based screening program at a rural Pathum Thani Province were conducted using liquid-based cytology and HPV genotyping.

Results

Of 5906 women aged 20–70 years, Pap smear was abnormal in 4.9% and the overall HPV prevalence was 15.1%, with 6.4% high-risk (HR), 3.5% probable high-risk (PR), and 8.4% low-risk (LR) HPV. The prevalence and genotypic distribution were not significantly different between the two cohorts. Among HR-HPV genotypes, HPV52 was the most frequent (1.6%), followed by HPV16 (1.4%), HPV51 (0.9%), HPV58 (0.8%), HPV18 (0.6%), and HPV39 (0.6%). Among LR-HPV genotypes, HPV72 and HPV62 were the most frequent while HPV6 and HPV11 were rare. HPV infection was found to be proportionately high in young women, aged 20–30 years (25%) and decreasing with age (11% in women aged >50). The more severe abnormal cytology results, the higher positivity of HR-HPV infection was observed.

Conclusions

In conclusion, HPV52, HPV16, and HPV51 were identified as the most common HR-HPV genotypes in Thai women. This study contributes genotypic evidence that should be essential for the development of appropriate HPV vaccination program as part of Thailand’s cervical cancer prevention strategies.