Dataset Information

Secular trends in menarcheal age in India-evidence from the Indian human development survey.

ABSTRACT: BACKGROUND:Evidence from a number of countries in Europe and North America point towards the secular declining trend in menarcheal age with considerable spatial variations over the past two centuries. Similar trends were reported in several developing countries from Asia, Africa and Latin America. However, data corroborating any secular trend in the menarcheal age of the Indian population remained sparse and inadequately verified. METHODS:We examined secular trends, regional heterogeneity and association of socioeconomic, anthropometric and contextual factors with menarcheal age among ever-married women (15-49 years) in India. Using the pseudo cohort data approach, we fit multiple linear regression models to estimate secular trends in menarcheal age of 91394 ever-married women using the Indian Human Development Survey. RESULTS:The mean age at menarche among Indian women was 13.76 years (95 % CI: 13.75, 13.77) in 2005. It declined by three months from 13.83 years (95% CI: 13.81, 13.85) among women born prior to 1955-1964, to nearly 13.62 years (95% CI: 13.58, 13.67) among women born during late 1985-1989. However, these aggregate national figures mask extensive spatial heterogeneity as mean age at menarche varied from 15.0 years in Himachal Pradesh during 1955-1964 (95% CI: 14.89-15.11) to about 12.1 years in Assam (95% CI: 11.63-12.56) during 1985-1989. CONCLUSION:The regression analysis established a reduction of nearly one month per decade, suggesting a secular decline in age at menarche among Indian women. Notably, the menarcheal age was significantly associated with the area of residence, geographic region, linguistic groups, educational attainment, wealth status, caste and religious affiliations among Indian women.

SUBMITTER: Pathak PK

PROVIDER: S-EPMC4219698 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Secular trends in menarcheal age in India-evidence from the Indian human development survey.

Pathak Praveen Kumar PK Tripathi Niharika N Subramanian S V SV

PloS one 20141104 11

<h4>Background</h4>Evidence from a number of countries in Europe and North America point towards the secular declining trend in menarcheal age with considerable spatial variations over the past two centuries. Similar trends were reported in several developing countries from Asia, Africa and Latin America. However, data corroborating any secular trend in the menarcheal age of the Indian population remained sparse and inadequately verified.<h4>Methods</h4>We examined secular trends, regional heter ...[more]

PMID: 25369507

Similar Datasets

Project description:ImportanceThe initial clinical sign of pubertal onset in girls is breast gland development (thelarche). Although numerous studies have used recalled age at menarche (first menstruation) to assess secular trends of pubertal timing, no systematic review has been conducted of secular trends of thelarche.ObjectivesTo systematically evaluate published data on pubertal timing based on age at thelarche and evaluate the change in pubertal onset in healthy girls around the world.Data sourcesA systematic literature search was performed in PubMed and Embase of all original peer-reviewed articles published in English before June 20, 2019.Study selectionIncluded studies used clinical assessment of breast development in healthy girls and used adequate statistical methods, including the reporting of SEs or CIs. The quality of the articles was evaluated by assessing study design, potential sources of bias, main characteristics of the study population, and methods of statistical analysis.Data extraction and synthesisIn accordance with PRISMA guidelines, all articles were assessed for eligibility independently by 2 authors. Weighted regression analysis was performed using a random-effects model.Main outcomes and measuresStudies examining age at thelarche (development of Tanner breast stage 2) in healthy girls.ResultsThe literature search resulted in a total of 3602 studies, of which 30 studies fulfilled the eligibility criteria. There was a secular trend in ages at thelarche according to race/ethnicity and geography. Overall, the age at thelarche decreased 0.24 years (95% CI, -0.44 to -0.04) (almost 3 months) per decade from 1977 to 2013 (P?=?.02).Conclusions and relevanceThe age at thelarche has decreased a mean of almost 3 months per decade from 1977 to 2013. A younger age at pubertal onset may change current diagnostic decision-making. The medical community needs current and relevant data to redefine "precocious puberty," because the traditional definition may be outdated, at least in some regions of the world.

Project description:Reproductive factors have been linked to both breast cancer and DNA methylation, suggesting methylation as an important mechanism by which reproductive factors impact on disease risk. However, few studies have investigated the link between reproductive factors and DNA methylation in humans. Genome-wide methylation in peripheral blood lymphocytes of 376 healthy women from the prospective EPIC study was investigated using LUminometric Methylation Assay (LUMA). Also, methylation of 458877 CpG sites was additionally investigated in an independent group of 332 participants of the EPIC-Italy sub-cohort, using the Infinium HumanMethylation 450 BeadChip. Multivariate logistic regression and linear models were used to investigate the association between reproductive risk factors and genome wide and CpG-specific DNA methylation, respectively. Menarcheal age was inversely associated with global DNA methylation as measured with LUMA. For each yearly increase in age at menarche, the risk of having genome wide methylation below median level was increased by 32% (OR:1.32, 95%CI:1.14-1.53). When age at menarche was treated as a categorical variable, there was an inverse dose-response relationship with LUMA methylation levels (OR(12-14 vs. ?11 yrs):1.78, 95%CI:1.01-3.17 and OR(?15 vs. ?11 yrs):4.59, 95%CI:2.04-10.33; P for trend<0.0001). However, average levels of global methylation as measured by the Illumina technology were not significantly associated with menarcheal age. In locus by locus comparative analyses, only one CpG site had significantly different methylation depending on the menarcheal age category examined, but this finding was not replicated by pyrosequencing in an independent data set. This study suggests a link between age at menarche and genome wide DNA methylation, and the difference in results between the two arrays suggests that repetitive element methylation has a role in the association. Epigenetic changes may be modulated by menarcheal age, or the association may be a mirror of other important changes in early life that have a detectable effect on both methylation levels and menarcheal age.

Project description:BackgroundCesarean section (CS) delivery rate has increased significantly both globally and in India, thereby posing a burden on overstretched health systems.ObjectiveThis study plans to understand the factors associated with CS rate with an objective to (1) analyze the trends of CS delivery from 1998-99 to 2019-21 and (2) understand the proximate determinants of CS deliveries in India.MethodsAnalysis of secondary data (National Family Health Survey) of a nationally representative sample of 230,870 women (year 2019-21) was undertaken to explore the trends, distribution, and determinants of CS deliveries in India and within states. Multivariable analyses were performed to determine the proximate variables associated with CS and elective CS. The relative interaction effect of confounding factors, such as number of antenatal care (ANC) visits, place of residence, and wealth status, on cesarean delivery was assessed. A composite index was generated using trust, support, and intimate partner violence variables (termed the partner human capital index [PHI]) to study its influence on CS deliveries, with a low PHI indicating abusive partner and a high PHI indicating supportive partner. Statewise spatial distribution of the most significantly associated factors, namely, wealth quintile and ANC checkups, were also analyzed.ResultsThe overall prevalence of CS was 21.50% (49,634/230,870) which had risen from 16.72% (2312/13,829) in 1998-99. The adjusted odds of CS deliveries were significantly higher among women who were highly educated (odds ratio [OR] 7.30, 95% CI 7.02-7.60; P<.001), had 4 or more ANC visits (OR 2.28, 95% CI 2.15-2.42; P<.001), belonging to the high-wealth quintile (OR 7.87, 95% CI 7.57-8.18; P<.001), and from urban regions. Increasing educational level of the head of the household (OR 3.05, 95% CI 2.94-3.16; P<.001) was also found to be a significant determinant of CS deliveries. The odds of selection of elective and emergency CS were also significantly higher among women from richer families (OR 1.66, 95% CI 1.25-2.21; P<.001) and those belonging to Christian religion (OR 1.67, 95% CI 1.14-2.43; P=.008). Adjusting the cesarean delivery by PHI, the odds of outcome were significantly higher among women with moderate and high PHI compared with those with low PHI (OR 1.46, 95% CI 1.36-1.56 and OR 1.61, 95% CI 1.49-1.74, respectively; P<.001 for both). The interaction effect result reiterates that women with more than 4 ANC checkups, high PHI, and belonging to the richer wealth quintile were more likely to undergo cesarean delivery (OR 22.22, 95% CI 14.99-32.93; P<.001) compared with those with no ANC visit, low PHI, and poorest women.ConclusionsThe increasing trend of CS deliveries across India is raising concerns. Better education, wealth, and good support from the partner have been incriminated as the contributory factors. There is a need to institute proper monitoring mechanisms to assess the need for CS, especially when performed electively.

Dataset Information

Secular trends in menarcheal age in India-evidence from the Indian human development survey.

Publications

Secular trends in menarcheal age in India-evidence from the Indian human development survey.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets