Mee Lian Wong

The effects of problem-based learning during medical school on physician competency: a systematic review

Background: Systematic reviews on the effects of problem-based learning have been limited to knowledge competency either during medical school or postgraduate training. We conducted a systematic review of evidence of the effects that problem-based learning during medical school had on physician competencies after graduation. Methods: We searched MEDLINE, EMBASE, CINAHL, PsycINFO, Cochrane Databases, and the tables of contents of 5 major medical education journals from earliest available date through Oct. 31, 2006. We included studies in our review if they met the following criteria: problem-based learning was a teaching method in medical school, physician competencies were assessed after graduation and a control group of graduates of traditional curricula was used. We developed a scoring system to assess the quality of the studies, categorized competencies into 8 thematic dimensions and used a second system to determine the level of evidence for each competency assessed. Results: Our search yielded 102 articles, of which 15 met inclusion criteria after full text review. Only 13 studies entered final systematic analysis because 2 studies reported their findings in 2 articles. According to self-assessments, 8 of 37 competencies had strong evidence in support of problem-based learning. Observed assessments had 7 competencies with strong evidence. In both groups, most of these competencies were in the social and cognitive dimensions. Only 4 competencies had moderate to strong levels of evidence in support of problem-based learning for both self-and observed assessments: coping with uncertainty (strong), appreciation of legal and ethical aspects of health care (strong), communication skills (moderate and strong respectively) and self-directed continuing learning (moderate). Interpretation: Problem-based learning during medical school has positive effects on physician competency after graduation, mainly in social and cognitive dimensions.

The Prevalence, Symptom Characteristics, and Impact of Irritable Bowel Syndrome in an Asian Urban Community

OBJECTIVE:To study the epidemiology, symptom characteristics and impact of IBS in an urban Asian population.METHODS:A validated bowel symptom questionnaire was administered at face-to-face interviews to a random sample of 3,000 households in Singapore.RESULTS:The response rate was 78.2% (n = 2,276, 1,143 males and 1,133 females). The age, sex, and racial distribution of our respondents were similar to the general population and there was no significant difference between respondents and nonrespondents by type of household. The prevalence of IBS was 11.0%, 10.4%, and 8.6% by Manning (>1 criteria), Rome I and Rome II criteria, respectively. There was a higher prevalence of IBS in those <50 years of age (9.7%vs 5.8% 50 or > years, p = 0.002), with more than 6 years of education (9.8%vs 5.9% 6 year or <, p = 0.002) and living in landed property (16.8%vs 8.2% living in apartments and public housing, p = 0.008). There was no striking preponderance of female IBS subjects. Chronic constipation was a more common bowel disturbance than chronic diarrhea among our IBS subjects (51.0%vs 12.8%).CONCLUSIONS:The prevalence and impact of IBS in our Asian urban society are greater than previously appreciated. We believe that our results provide a useful window to the future trends of gastrointestinal diseases for health and education authorities in developing Asian countries to look into.

Social and behavioural factors associated with condom use among direct sex workers in Siem Reap, Cambodia

Objectives: To determine the social and behavioural factors associated with condom use among direct sex workers in Siem Reap, Cambodia. Methods: Using a structured behavioural questionnaire, interviews were conducted with 140 direct sex workers attending a health centre in Siem Reap for HIV screening. Results: Consistent condom use with their clients was reported by 78% of sex workers compared to only 20% with their non-paying partners. Consistent condom use with clients was significantly higher among higher income than lower income sex workers (adjusted prevalence ratio: 1.91, 95% CI: 1.15 to 3.18) and those with good rather than poor negotiation skills (adjusted prevalence ratio: 1.51, 95% CI: 1.01 to 2.26), after adjustment for age, educational level, marital status, number of sexual encounters per week, and knowledge of AIDS/HIV and sexually transmitted infections. The most frequently reported reason for not using condoms with clients was not being able to persuade them (66.7%), while for non-paying partners, the reason was that they loved them (60.0%). Conclusion: To complement the government’s current programme of client education, 100% condom policy and brothel administrative measures, additional strategies to increase condom use among clients and non-paying partners should be directed at (i) the social policy and community levels to address sex workers’ economic and cultural barriers to condom use, and (ii) personal level empowerment through developing sex workers’ condom negotiation skills.

Sociodemographic and lifestyle factors associated with constipation in an elderly Asian community.

Objective:We surveyed elderly individuals in an Asian community to determine the prevalence of constipation and its association with sociodemographic and lifestyle factors. This information will be used to plan a health promotion program for the elderly.Methods:A random sample of 2807 residents aged ≥ 60 yr in Singapore were interviewed in their homes, using a standardized questionnaire. The response rate was 87.4%n = 2454.Results:The overall age- and gender-adjusted prevalence rate of functional constipation was 11.6 per 100 persons (95% confidence interval [CI], 11.4–11.7). There were no gender or ethnic differences in constipation rates. Increased rates of constipation were significantly associated with advancing age. We found a significant dose-response relationship of increased constipation rates with decreased intake of rice, increased intake of Chinese tea, and number of chronic illnesses and medications, after controlling for potential confounders. Constipation was also significantly associated with lower intake of fruits and vegetables, but no dose-response gradient was seen.Conclusions:Patients taking many medications should be monitored for constipation and given advice to avoid constipating factors. Further studies are needed to establish the causal-effect relationship of rice and Chinese tea with constipation.

Gender differences in predictors of colorectal cancer screening uptake: a national cross sectional study based on the health belief model

BackgroundColorectal Cancer (CRC) is rapidly rising in Asia, but screening uptake remains poor. Although studies have reported gender differences in screening rates, there have been few studies assessing gender specific perceptions and barriers towards CRC screening, based on behavioral frameworks. We applied the Health Belief Model to identify gender-specific predictors of CRC screening in an Asian population.MethodsA nationwide representative household survey was conducted on 2000 subjects aged 50 years and above in Singapore from 2007 to 2008. Screening behaviour, knowledge and beliefs on CRC screening were assessed by face-to-face structured interviews. The response rate was 88.2%.Results26.7 percent had undergone current CRC screening with no gender difference in rates. Almost all agreed that CRC would lead to suffering (89.8%), death (84.6%) and would pose significant treatment cost and expense (83.1%). The majority (88.5%) agreed that screening aids early detection and cure but only 35.4% felt susceptible to CRC. Nearly three-quarters (74.3%) of the respondents recalled reading or hearing information on CRC in the print or broadcast media. However, only 22.6% were advised by their physicians to undergo screening. Significantly more women than men had feared a positive diagnosis, held embarrassment, pain and risk concerns about colonoscopy and had friends and family members who encouraged screening. On multivariate analysis, screening uptake showed a positive association with worry about contracting CRC and a physician’s recommendation and a negative association with perceived pain about colonoscopy for both genders. For women only, screening was positively associated with having attended a public talk on CRC and having a family member with CRC, and was negatively associated with Malay race and perceived danger of colonoscopy.ConclusionsCRC screening remains poor despite high levels of awareness of its benefits in this Asian population. Race, worry about contracting cancer, psychological barriers, and cues from the doctor and a public talk on CRC were associated with screening with gender specific differences. Strategies to increase CRC screening uptake should consider gender specific approaches to address psychological barriers and increase disease susceptibility through public health education and active promotion by physicians.

Awareness of glaucoma, and health beliefs of patients suffering primary acute angle closure

Aim: To evaluate the factors associated with lack of awareness of glaucoma and late presentation to the doctor in Singapore Chinese patients with acute angle closure (AAC) Methods: A prospective, hospital based case series of 105 patients aged 35 years and above who presented with a first attack of AAC in a tertiary hospital in Singapore was conducted. A research assistant interviewed all patients face to face in clinic and recorded demographic factors, awareness of glaucoma, and subjective barriers to seeing a doctor. The time from onset of symptoms to presentation at the clinic was noted. Results: Overall, 22.9% of patients had heard of glaucoma. The multivariate adjusted odds ratio (OR) of unawareness of glaucoma in older people (> 60 years) was 1.5 (95% confidence interval (CI) 0.5 to 4.6), 3.2 (95% CI 1.1 to 9.2) for adults who were not working, and 13.8 (95% CI 1.3 to 146.7) for patients who had less than a pre-university education. A significant proportion (31.7%) of patients presented to the doctor 24 hours or more after symptoms occurred. In a multiple logistic regression model, the adjusted OR of late presentation was 8.5 (95% CI 1.04 to 69.5) if there was no car access, 5.0 (95% CI 1.0 to 24.6) if the patients spoke Chinese, and 3.3 (95% CI 0.9 to 11.9) if there was nobody to accompany to hospital. Conclusion: Glaucoma awareness among patients suffering AAC was not high. Lack of awareness was associated with increasing age, lack of formal education, and unemployment. A significant proportion of patients seek medical attention late. Risk factors for late presentation include lack of car access, nobody to accompany the patient, and speaking the Chinese language primarily. Health education programmes may help increase the knowledge and awareness of glaucoma.

Long-term effects of condom promotion programmes for vaginal and oral sex on sexually transmitted infections among sex workers in Singapore.

Objectives: To evaluate the long-term impact of condom promotion programmes for vaginal and oral sex among female brothel-based sex workers in Singapore. Design: A pre-test/post-test comparison group followed by a time series design was used to compare trends in condom use for vaginal sex and cervical gonorrhoea incidence from 1990 to 2002 across cross-sectional samples of sex workers before and after programme implementation in 1995. The subsequent condom promotion programme for oral sex was evaluated using the interrupted time series with a retrospective pre-test to post-test matched control group design. Methods: Sex workers completed a questionnaire before and 6 months after participation in educational sessions. Cervical and pharyngeal swabs were taken monthly for cultures for Neisseria gonorrhoeae. Results: Consistent condom use for vaginal sex increased significantly from < 45.0% before 1995 (pre-intervention period) to 95.1% in 2002, with a corresponding decline in cervical gonorrhoea incidence from > 30 to 2/1000 person-months. Adjustment for temporal changes in sociodemographic characteristics did not materially alter the trends. Consistent oral condom use increased significantly from < 50% before 1996 to 97.2% in 2002, with a corresponding decline in pharyngeal gonorrhoea from > 12 to 4.7/1000 person-months. Conclusion: The interventions produced sustained high levels of condom use for vaginal and oral sex with corresponding declines in cervical and pharyngeal gonorrhoea incidence.

A population study of nocturia in Singapore

To estimate the prevalence of nocturia in the multiracial Asian population of Singapore, using the new International Continence Society standardized definition of one or more voids per night, and to assess its associations, bothersomeness and impact on sleep.

Singaporean men's knowledge of cervical cancer and human papillomavirus (HPV) and their attitudes towards HPV vaccination

Little is known of mens knowledge of cervical cancer and its links with human papillomavirus (HPV), or of their attitudes and beliefs about HPV vaccination. This is despite mens sexual behaviour contributing to HPV transmission and their potential role in deciding whether their children are vaccinated against HPV. To address this, a comprehensive survey was conducted in Singapore where plans are underway for an HPV vaccination program. A representative sample of 930 Singaporean men was found to have moderate knowledge of cervical cancer but poor knowledge and awareness of HPV. Although these men showed strong support for HPV vaccination, overall findings highlight the importance of including men in education campaigns that aim to decrease the incidence of cervical and other HPV-related cancers and to increase the uptake of HPV vaccination.

Premarital Sexual Intercourse Among Adolescents in an Asian Country: Multilevel Ecological Factors

OBJECTIVE: The goal was to assess personal and environmental factors associated with premarital sex among adolescents. METHODS: We conducted a case-control study. Between 2006 and 2008, we recruited 500 adolescents who reported having engaged in voluntary sex for most recent sex. Five hundred control subjects were matched for age, gender, and ethnicity. RESULTS: Independently significant factors for premarital sex among boys were pornography viewing (adjusted odds ratio [OR]: 5.82 [95% confidence interval [CI]: 2.34–14.43]), lack of confidence to resist peer pressure (OR: 3.84 [95% CI: 2.27–6.50]), perception that more than one half of their friends had engaged in sex (OR: 3.37 [95% CI: 1.92–5.92]), permissiveness regarding premarital sex (OR: 3.41 [95% CI: 2.10–5.55]), involvement in gang activities (OR: 3.45 [95% CI: 1.66–7.15]), drinking (OR: 1.77 [95% CI: 1.07–2.94]), smoking (OR: 1.91 [95% CI: 1.14–3.20]), and living in low-cost housing (OR: 3.25 [95% CI: 1.64–6.43]). For girls, additional factors were previous sexual abuse (OR: 7.81 [95% CI: 2.50–24.41]) and dropping out of school (OR: 2.72 [95% CI: 1.32–5.61]), and stronger associations were found for lack of confidence to resist peer pressure (OR: 5.56 [95% CI: 2.94–10.53]) and permissiveness regarding premarital sex (OR: 6.25 [95% CI: 3.30–11.83]). Exposure to persons with HIV/AIDS or sexually transmitted infections in the media was negatively associated with sex for boys (OR: 0.27 [95% CI: 0.16–0.45]) and girls (OR: 0.24 [95% CI: 0.13–0.47]). CONCLUSION: Sex education programs for adolescents must address social, media, and pornographic influences and incorporate skills to negotiate sexual abstinence.