Menarche and menopause are two major components of a woman’s reproductive life. Ages at menarche and menopause vary widely between and within populations and are influenced by various factors, both genetic and environmental. The present community-based cross-sectional investigation aimed to assess the association between ages at menarche and natural menopause among women belonging to the indigenous Rajbanshi population of North Bengal, India. The investigation was carried out from January 2015 to May 2015 among 510 Rajbanshi women aged between 45 and 55 years residing in the district of Darjeeling, West Bengal, India. A structured schedule was used to collect data on ages at menarche and natural menopause, marital status, parity, education, age of first and last pregnancies, duration of breastfeeding, nature of occupation, health status, smoking and monthly family income. Anthropometric measurements of height and weight were recorded and Body Mass Index (BMI) calculated. The statistical analyses, which included descriptive statistics and binary logistic regression (BLR), were done using SPSS. The women’s mean age of menarche and median age of natural menopause were 12.52 years and 50 years, respectively. The BLR analysis indicated that education, age at first pregnancy had significant effects on the age at natural menopause among women who experienced menarche at <12 years of age (p<0.05). In the case of women who attained menarche at ≥12 years of age, marital status, age at last pregnancy, parity, education, duration of breastfeeding, smoking, occupation, monthly income and BMI had a greater influence on age at natural menopause. There appears to be an indirect association between age at menarche and age at natural menopause, along with different predictor variables, among the Rajbanshi women.

中文翻译：

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印度北孟加拉邦土著人口初潮年龄与绝经年龄之间的关系

初潮和更年期是女性生殖生活的两个主要组成部分。初潮和绝经的年龄在人群之间和人群内部差异很大，并受遗传和环境等各种因素的影响。目前基于社区的横断面调查旨在评估印度北孟加拉邦土著 Rajbanshi 女性的初潮年龄与自然绝经之间的关系。该调查于 2015 年 1 月至 2015 年 5 月对居住在印度西孟加拉邦大吉岭地区的 510 名 45 至 55 岁的 Rajbanshi 妇女进行。使用结构化时间表收集有关初潮和自然绝经年龄、婚姻状况、产次、教育、第一次和最后一次怀孕的年龄、母乳喂养时间、职业性质、健康状况、吸烟和家庭月收入。记录身高和体重的人体测量结果并计算体重指数（BMI）。统计分析包括描述性统计和二元逻辑回归 (BLR)，使用 SPSS 完成。女性的平均初潮年龄和自然绝经的中位年龄分别为 12.52 岁和 50 岁。BLR 分析表明，受教育程度、首次怀孕年龄对月经初潮年龄小于 12 岁的女性的自然绝经年龄有显着影响。女性的平均初潮年龄和自然绝经的中位年龄分别为 12.52 岁和 50 岁。BLR 分析表明，受教育程度、首次怀孕年龄对月经初潮年龄小于 12 岁的女性的自然绝经年龄有显着影响。女性的平均初潮年龄和自然绝经的中位年龄分别为 12.52 岁和 50 岁。BLR 分析表明，受教育程度、首次怀孕年龄对月经初潮年龄小于 12 岁的女性的自然绝经年龄有显着影响。p<0.05)。对于月经初潮的女性≥12岁、婚姻状况、上次怀孕年龄、产次、教育程度、母乳喂养时间、吸烟、职业、月收入和BMI对自然绝经年龄的影响较大。在 Rajbanshi 女性中，初潮年龄和自然绝经年龄以及不同的预测变量之间似乎存在间接关联。