Azcorra Hugo, Rodríguez Luis, Datta Banik Sudip, Bogin Barry, Dickinson Federico, Varela-Silva Maria Ines
Departamento de Ecología Humana, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Antigua carretera a Progreso Km 6, C.P, Mérida, Yucatán, 97310, México.
Facultad de Matemáticas, Universidad Autónoma de Yucatán, Mérida, Yucatán, México.
Am J Hum Biol. 2018 Mar;30(2). doi: 10.1002/ajhb.23087. Epub 2017 Nov 27.
To analyze whether living conditions, experienced by mothers and adult daughters during their childhood, are associated with age at menarche (AAM) in daughters.
From September, 2011, to January, 2014, AAM and childhood living conditions were collected from a sample of 246 dyads of Maya mothers (mean age = 59.60 years, SD = 8.64) and their adult daughters (mean age = 33.03 years, SD = 5.57) from the cities of Merida and Motul in Yucatan, Mexico. Indicators of childhood living conditions were number of siblings and quality of house construction materials in both generations, and father's absence among daughters in their pre-menarcheal years. Multiple regression models were used to assess the association between childhood conditions in mother-daughter dyads and daughter's AAM.
The recalled mean AAM of adult Maya daughters was 12.05 years (SD = 1.53). After adjusting for the influence of mothers' AAM, number of siblings in both the mothers' and daughters' families directly predicted daughters' AAM (more siblings was associated with a later AAM); and a higher (better) index of household conditions in mothers' childhood was associated with earlier AAM in daughters. The household conditions index during the childhood of daughters and father's absence were not associated with their AAM.
Our results suggest that better living conditions experienced by the mothers and daughters during their childhood may lower mean AAM in daughters in the context of populations that show important intergenerational changes in their social and economic conditions.
分析母亲和成年女儿在童年时期的生活条件是否与女儿的初潮年龄（AAM）相关。
2011年9月至2014年1月，从墨西哥尤卡坦州梅里达和莫图尔市的246对玛雅母亲（平均年龄=59.60岁，标准差=8.64）及其成年女儿（平均年龄=33.03岁，标准差=5.57）样本中收集初潮年龄和童年生活条件。童年生活条件指标包括两代人的兄弟姐妹数量和房屋建筑材料质量，以及女儿初潮前父亲是否缺位。采用多元回归模型评估母女二元组中的童年条件与女儿初潮年龄之间的关联。
成年玛雅女儿回忆的平均初潮年龄为12.05岁（标准差=1.53）。在调整母亲初潮年龄的影响后，母亲和女儿家庭中的兄弟姐妹数量直接预测了女儿的初潮年龄（兄弟姐妹越多，初潮年龄越晚）；母亲童年时期较高（较好）的家庭条件指数与女儿较早的初潮年龄相关。女儿童年时期的家庭条件指数和父亲缺位与她们的初潮年龄无关。
我们的结果表明，在社会和经济条件存在重要代际变化的人群中，母亲和女儿在童年时期经历的更好生活条件可能会降低女儿的平均初潮年龄。
