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Iranian Journal of Health Sciences، جلد ۱، شماره ۲، صفحات ۵۶-۶۰
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| کلیدواژه‌های فارسی مقاله |
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| عنوان انگلیسی |
Comparing two Formulas of Sample Size Determination for Prevalence Studies |
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| چکیده انگلیسی مقاله |
Background and purpose: Sample size and its determination is one of the most important problems in health researches. Calculating sample size for prevalence studies is one of the common questions of sample size topics. Minimum sample size with least complexity is desirable in order to achieve the basic goal of these studies. This study aims to compare two formulas of sample size calculation for prevalence researches and finally, to use the simplest formula to get the most appropriate sample size. Methods Sample size for proportions: 0.9, 0.95, 0.99, 0.999 candidates of p close to 1 proportions 10-5, 10-4, 10-3, 10-2, 0.05, 0.1 candidates of p close to 0, and proportions 0.3, 0.4, 0.5, 0.6, 0.7 candidates of p close to 0.5 were calculated. For comparing n1, n2 φ =n_1⁄n_2 , it was computed by R package (2.10.1). Results Computed sample size by (f2) is lightly greater than sample size computed by (f1) and maximum value of φ index for comparing the two formulas equals 1. Conclusion Results show that the calculated sample size by (f1) is similar to what was obtained by (f2), though, according to its interpretation and easy computation ,it is suggested for all values of p. |
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| کلیدواژه‌های انگلیسی مقاله |
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| نویسندگان مقاله |
حامد تابش | hamed tabesh
department of biostatistics and epidemiology, school of health, ahvaz jundishapur university of medical sciences, ahvaz, iran
سازمان اصلی تایید شده: دانشگاه علوم پزشکی جندی شاپور اهواز (Ahvaz jundishapur university of medical sciences)
آزاده ساکی | azadeh saki
department of biostatistics and epidemiology, school of health, ahvaz jundishapur university of medical sciences, ahvaz, iran
سازمان اصلی تایید شده: دانشگاه علوم پزشکی جندی شاپور اهواز (Ahvaz jundishapur university of medical sciences)
فاطمه پورمطهری | fatemeh pourmotahari
department of biostatistics and epidemiology, school of health, ahvaz jundishapur university of medical sciences, ahvaz, iran
سازمان اصلی تایید شده: دانشگاه علوم پزشکی جندی شاپور اهواز (Ahvaz jundishapur university of medical sciences)
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| نشانی اینترنتی |
http://jhs.mazums.ac.ir/browse.php?a_code=A-10-352-2&slc_lang=fa&sid=en |
| فایل مقاله |
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| کد مقاله (doi) |
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
آمار زیستی |
| نوع مقاله منتشر شده |
پژوهشی |
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