Estimating menarcheal age distribution from partially recalled data
نویسندگان
چکیده
منابع مشابه
Estimating survival from partially observed data
Often, in cross-sectional-follow-up studies, survival data are obtained from prevalent cases only. This sampling mechanism introduces lenght-bias. An added difficulty is that in some cases the times of the onset cannot be ascertained or are recorded with great uncertainty. Such was the situation in the Canadian Study of Health and Aging (CSHA), an ongoing nation-wide study of dementia conducted...
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The subjects of the study were 85 Indian sportswomen from Delhi and the states of Uttar Pradesh, Punjab and Gujarat, and included outstanding players of cricket, hockey, kho-kho and table-tennis, who were winners of university, state or national championships. A sample of 77 subjects selected at random was used as the control. The recall procedures suggested by Damon and Bajema (1974) were used...
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A prevalent sample consists of individuals who have experienced disease incidence but not failure event at the sampling time. We discuss methods for estimating the distribution function of a random vector defined at baseline for an incident disease population when data are collected by prevalent sampling. Prevalent sampling design is often more focused and economical than incident study design ...
متن کاملMenarcheal age in Ghanaian school girls.
In a cross-sectional retrospective study of 2087 Ghanaian school girls in various educational institutions in the Kumasi district, Ashanti region, Ghana, the mean menarcheal age was found to be 13.98 +/- 1.42 years. Differences in the menarcheal age of the girls was found to be significantly correlated to social class, parents ethnic origin, educational institution and home living area (P = 0.0...
متن کاملDecline in menarcheal age among Saudi girls
OBJECTIVES To estimate age at menarche and to assess trends in menarcheal age among Saudi women. METHODS A prospective longitudinal study was conducted among healthy prepubertal female school children and adolescents from September 2006 to July 2012 in Riyadh, Kingdom of Saudi Arabia. Study participants were invited from diverse socioeconomic backgrounds. Tanner stage, height, weight, body ma...
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ژورنال
عنوان ژورنال: Biostatistics
سال: 2019
ISSN: 1465-4644,1468-4357
DOI: 10.1093/biostatistics/kxz013