estimating steatosis prevalence in overweight and obese children: comparison of bayesian small area and direct methods

نویسندگان

hamid reza khalkhali associate professor in biostatistics, inpatient’s safety research center, department of biostatistics and epidemiology, urmia university of medical sciences, urmia, iran.

shahsanam gheibi associate professor of pediatric gastroenterology, maternal and childhood obesity research center, urmia university of medical sciences, urmia, iran.

rasool gharaaghaji associate professor in biostatistics, department of health and preventive medicine, urmia university of medical sciences, urmia, iran.

alireza didarloo associate professor in health education and promotion, solid tumor research center, department of health and preventive medicine, urmia university of medical sciences, urmia, iran.

چکیده

background often, there is no access to sufficient sample size to estimate the prevalence using the method of direct estimator in all areas. the aim of this study was to compare small area’s bayesian method and direct method in estimating the prevalence of steatosis in obese and overweight children. materials and methods: in this cross-sectional study, was conducted on 150 overweight and obese children aged 2 to 15 years referred to the children&apos;s digestive clinic of urmia university of medical sciences- iran, in 2013. after body mass index (bmi) calculation, children with overweight and obese were assessed in terms of primary tests of obesity screening. then children with steatosis confirmed by abdominal ultrasonography, were referred to the laboratory for doing further tests. steatosis prevalence was estimated by direct and bayesian method and their efficiency were evaluated using mean-square error jackknife method. the study data was analyzed using the open bugs3.1.2 and r2.15.2 software. results: the findings indicated that estimation of steatosis prevalence in children using bayesian and direct methods were between 0.3098 to 0.493, and 0.355 to 0.560 respectively, in health districts; 0.3098 to 0.502, and 0.355 to 0.550 in education districts; 0.321 to 0.582, and 0.357 to 0.615 in age groups; 0.313 to 0.429, and 0.383 to 0.536 in sex groups. in general, according to the results, mean-square error of bayesian estimation was smaller than direct estimation (p<0.05). conclusion the study suggests that estimation of prevalence using bayesian estimation method via the logistic mixed model was more efficient and better than direct estimation method.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Estimating Steatosis Prevalence in Overweight and Obese Children: Comparison of Bayesian Small Area and Direct Methods

Background Often, there is no access to sufficient sample size to estimate the prevalence using the method of direct estimator in all areas. The aim of this study was to compare small area’s Bayesian method and direct method in estimating the prevalence of steatosis in obese and overweight children. Materials and Methods: In this cross-sectional study, was conducted on 150 overweight and obese ...

متن کامل

investigation of single-user and multi-user detection methods in mc-cdma systems and comparison of their performances

در این پایان نامه به بررسی روش های آشکارسازی در سیستم های mc-cdma می پردازیم. با توجه به ماهیت آشکارسازی در این سیستم ها، تکنیک های آشکارسازی را می توان به دو دسته ی اصلی تقسیم نمود: آشکارسازی سیگنال ارسالی یک کاربر مطلوب بدون در نظر گرفتن اطلاعاتی در مورد سایر کاربران تداخل کننده که از آن ها به عنوان آشکارساز های تک کاربره یاد می شود و همچنین آشکارسازی سیگنال ارسالی همه ی کاربران فعال موجود در...

Comparison of Small Area Estimation Methods for Estimating Unemployment Rate

Extended Abstract. In recent years, needs for small area estimations have been greatly increased for large surveys particularly household surveys in Sta&shy; tistical Centre of Iran (SCI), because of the costs and respondent burden. The lack of suitable auxiliary variables between two decennial housing and popula&shy; tion census is a challenge for SCI in using these methods. In general, the...

متن کامل

Comparison of body composition methods in overweight and obese children.

The objective of the present study was to investigate the accuracy of percent body fat (%fat) estimates from dual-energy X-ray absorptiometry, air-displacement plethysmography (ADP), and total body water (TBW) against a criterion four-compartment (4C) model in overweight and obese children. A volunteer sample of 30 children (18 male and 12 female), age of (mean +/- SD) 14.10 +/- 1.83 yr, body m...

متن کامل

on the comparison of keyword and semantic-context methods of learning new vocabulary meaning

the rationale behind the present study is that particular learning strategies produce more effective results when applied together. the present study tried to investigate the efficiency of the semantic-context strategy alone with a technique called, keyword method. to clarify the point, the current study seeked to find answer to the following question: are the keyword and semantic-context metho...

15 صفحه اول

assessment of deep word knowledge in elementary and advanced iranian efl learners: a comparison of selective and productive wat tasks

testing plays a vital role in any language teaching program. it allows teachers and stakeholders, including program administrators, parents, admissions officers and prospective employers to be assured that the learners are progressing according to an accepted standard (douglas, 2010). the problems currently facing language testers have both practical and theoretical implications but the first i...

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
international journal of pediatrics

جلد ۴، شماره ۹، صفحات ۳۳۹۱-۳۳۹۷

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023