Table 2 Yearly changes in age at menarche overall and in each 10-year birth cohort by region and education for women born in southeastern China between 1955 and 1985
From: Secular trends in age at menarche among women born between 1955 and 1985 in Southeastern China
Variables | Overall | 1955–65 | 1966–75 | 1976–85 |
|---|---|---|---|---|
Coefficient [95% CI] | Coefficient [95% CI] | Coefficient [95% CI] | Coefficient [95% CI] | |
All * | −0.033 [−0.033, −0.032] | −0.038 [−0.046, −0.030] | −0.043 [−0.045, −0.042] | −0.032 [−0.034, −0.031] |
Region †|  |  |  |  |
Urban | −0.027 [−0.029, −0.026]‡ | −0.044 [−0.068, −0.019]‡ | −0.040 [−0.044, −0.036] | −0.028 [−0.033, −0.023]‡ |
Rural | −0.034 [−0.034, −0.033]‡ | −0.038 [−0.046, −0.029]‡ | −0.044 [−0.046, −0.043] | −0.033 [−0.035, −0.032]‡ |
Education ¶ |  |  |  |  |
High school or above | −0.031 [−0.032, −0.030]§ | −0.061[−0.084, −0.037] | −0.036 [−0.040, −0.033]§ | −0.027 [−0.030, −0.023]§ |
Middle school | −0.033 [−0.034, −0.032]§ | −0.040 [−0.052, −0.028] | −0.043 [−0.045, −0.041]§ | −0.035 [−0.037, −0.032]§ |
Primary school or less | −0.040 [−0.042, −0.038]§ | −0.030 [−0.042, −0.019] | −0.050 [−0.054, −0.047]§ | −0.047 [−0.054, −0.040]§ |