RESUMO
This article is concerned with the development of some stochastic models better suited to describe the observed distributions of the menstruating interval relating to last closed-birth interval of two types of females. In this context, two models suited for couples using or not using contraception have been proposed. In the first case, the model assumes a constant conception rate (analogous to the constant hazard rate in the life-testing problem) over time whereas the second case assumes a time-dependent form of the conception rate. The models have been applied to the data collected in a survey conducted in Lucknow, and estimates of conception rate for the two types of females have also been obtained.
Assuntos
Intervalo entre Nascimentos/estatística & dados numéricos , Comportamento Contraceptivo/estatística & dados numéricos , Anticoncepcionais Femininos/administração & dosagem , Menstruação/fisiologia , Amenorreia/etiologia , Coleta de Dados , Feminino , Humanos , Menstruação/efeitos dos fármacos , Modelos Biológicos , Modelos Estatísticos , Período Pós-Parto/fisiologia , Gravidez , Fatores de TempoRESUMO
Most studies of closed birth intervals are regarding their variation at specific orders among females. This paper attempts to study the nature of the distributions of consecutive closed birth intervals. Data from the Uttar Pradesh National Family Health Survey 1998-99 (NFHS-2) were analysed. It was found that, under certain assumptions, the postpartum amenorrhoea period and menstruating interval are negatively associated, indicating that socio-cultural factors are affecting the menstruating interval.
Assuntos
Amenorreia/etiologia , Intervalo entre Nascimentos/etnologia , Saúde da Família , Menstruação/etnologia , Amenorreia/etnologia , Intervalo entre Nascimentos/estatística & dados numéricos , Feminino , Inquéritos Epidemiológicos , Humanos , Índia , Gravidez , Fatores de Risco , Fatores Socioeconômicos , Fatores de TempoRESUMO
"This paper presents a methodology for estimating parity progression ratios (the probability that a woman after delivering...any particular birth will ever proceed to the next birth), utilizing data on births tabulated by birth order and age of the mother in a particular year. This approach...does not need estimates of [gross reproductive rate] as well as the infant mortality rate but it requires knowledge of the growth rate of the population." The technique is illustrated with data from the 1984-1987 Pakistan Fertility Survey.
Assuntos
Coeficiente de Natalidade , Métodos , Paridade , Crescimento Demográfico , Ásia , Demografia , Países em Desenvolvimento , Fertilidade , Paquistão , População , Dinâmica PopulacionalRESUMO
A procedure to estimate parity progression ratios in a population from the truncated distribution of open and closed birth intervals is presented. The approach is quite simple in computation and data needs. It does not require any separate data on age at last birth to the women of completed fertility as in earlier methods. The procedure is illustrated with an observed set of data.
Assuntos
Intervalo entre Nascimentos , Paridade , Biometria/métodos , Feminino , Fertilidade , Humanos , GravidezRESUMO
"Based on certain assumptions, a probability model for number of migrants has been proposed. The model involves several parameters. The estimates of some of the parameters are determined assuming that the rest are known." The model is applied to data from India taken from a 1978 survey of 3,514 households in villages classified as semi-urban, remote, or growth centers.
