Estimation of Leprosy Prevalence in Bago and Kawa Townships Using Two-Stage Probability proportionate to Size Sampling Technique

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Abstract
Myint T (Leprosy Control Program, Department of Health, Ministry of Health, 36 Theinbyu Road, Yangon, Myanmar), Htoon MT and Shwe T. Estimation of leprosy prevalence in Bago and Kawa townships using two-stage probability proportionate to size sampling technique. International Journal of Epidemiology 1992, 21: 778–783. Two surveys to estimate leprosy prevalence using two-stage probability proportionate to size sampling technique were conducted in Bago and Kawa townships. A total of 3519 and 3739 individuals were examined in each township. The two surveys were finished within 25 (Bago) and 30 (Kawa) working days at a cost of Kyats 10 000 (US$1500) for each survey. The estimated leprosy prevalence obtained in Bago was 9.95 per 1000 population (95% confidence interval (CI): 7.11–12.78) and in Kawa it was 12.04 per 1000 population (95% CI: 8.85–15.22). A total of 30 (Bago) and 34 (Kawa) new leprosy cases were detected in the two surveys. Grade I disability was seen to be 20% in Bago and 18.78% in Kawa, whereas grade II disability was 17.14% in Bago and 15.56% in Kawa.

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