Seyyed Mohammad Taghi Ayatollahi

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BACKGROUND Age at menarche and its potential associated factors are reported for 1862 Shiraz (Southern Iran) secondary school girls taking part in a cross-sectional survey selected from the four educational districts of the city. METHODS Probit analysis was used to estimate age at menarche, principal component analysis (PCA) was applied to analyse(More)
The prevalence of overweight and obesity among schoolchildren aged 6.5-11.5 years in Shiraz (southern Iran) are presented in this paper. The body mass index (BMI) percentiles of these children are compared with the Center for Disease Control and Prevention (CDC) reference data and with the Iranian standard. The data are based on a random multistage sample(More)
Headache is a common symptom that constitutes a major health problem to all countries in the world. This study was conducted to estimate the prevalence of migraine and tension-type headaches(TTH), its associated occupational risk factors among Shiraz hospitals staffs, and to report on clinical characteristics of migraine and TTH with using the International(More)
From January to June 2003 we determined the prevalence of the various types of headache in 2226 schoolchildren in Shiraz (age 6-13 years) selected by multistage random sampling. Data were collected by questionnaire and clinical examination. International Headache Society criteria were used for diagnosis. The overall prevalence of headache was 31%.(More)
OBJECTIVE To determine the prevalences of migraine and tension-type headache in teenaged girls attending schools in Shiraz (southern Iran). BACKGROUND Studies of headache prevalence are numerous, and findings have varied according to the specific population and region involved. No data are available regarding headache prevalence among Iranian teenagers.(More)
PURPOSE To assess the role of two adjuvant chemotherapy regimens, anthracycline-based and CMF on disease free survival and overall survival breast cancer patients by meta-analysis approach in Eastern Mediterranean and Asian countries to determine which is more effective and evaluate the appropriateness and efficiency of two different proposed statistical(More)
INTRODUCTION Awareness of the latest scientific research and publishing articles in top journals is one of the major concerns of health researchers. In this study, we first introduced top journals of obstetrics and gynecology field based on their Impact Factor (IF), Eigenfactor Score (ES) and SCImago Journal Rank (SJR) indicator indexed in Scopus databases(More)
The prevalence of overweight and obesity in most developed and developing countries have been increasing markedly over the past two decades. This increase includes all ages, genders, racial and ethnic groups, income, and educational levels. This study examined the prevalence of overweight and obesity among adults aged 25-55 years in Shiraz (Southern Iran).(More)
BACKGROUND The summary measure approach (SMA) is sometimes the only applicable tool for the analysis of repeated measurements in medical research, especially when the number of measurements is relatively large. This study aimed to describe techniques based on summary measures for the analysis of linear trend repeated measures data and then to compare(More)
BACKGROUND Item response theory (IRT) is extensively used to develop adaptive instruments of health-related quality of life (HRQoL). However, each IRT model has its own function to estimate item and category parameters, and hence different results may be found using the same response categories with different IRT models. The present study used the Rasch(More)