Table 4 Results of the Cox proportional hazards model
Period (before 1966 = 0) | Model 1 | Model 2 | Model 3 | Model 4 | Model 5 | Model 6 |
|---|---|---|---|---|---|---|
1966 to 1980 | −0.05 (0.311) | −0.036 (0.311) | −0.021 (0.311) | −0.009 (0.311) | −0.038 (0.311) | −0.015 (0.311) |
1981 to 1991 | 0.406 (0.280) | 0.491 (0.280) | 0.406 (0.281) | 0.434 (0.281) | 0.434 (0.280) | 0.439 (0.281) |
1992 to 1999 | 1.287*** (0.269) | 1.401*** (0.269) | 1.276*** (0.270) | 1.304*** (0.270) | 1.329*** (0.270) | 1.315*** (0.270) |
2000 to 2010 | 1.430*** (0.270) | 1.553*** (0.270) | 1.422*** (0.270) | 1.449*** (0.270) | 1.483*** (0.270) | 1.463*** (0.270) |
Urban (rural = 0) | 0.461*** (0.102) | 0.466*** (0.103) | 0.469*** (0.102) | 0.466*** (0.102) | −0.065 (0.166) | 0.206 (0.126) |
Wife’s age at first marriage | −0.048*** (0.013) | −0.047*** (0.013) | −0.050*** (0.013) | −0.050*** (0.013) | −0.047*** (0.013) | −0.049*** (0.013) |
Wife’s years of education | 0.054*** (0.011) | 0.055*** (0.011) | 0.054*** (0.011) | 0.053*** (0.011) | 0.055*** (0.011) | 0.054*** (0.011) |
Premarital birth (no = 0) | 1.589*** (0.171) | 1.591*** (0.172) | 1.446*** (0.179) | 1.467*** (0.179) | 1.461*** (0.179) | 1.456*** (0.179) |
No. of children | −1.051*** (0.076) | −1.554*** (0.103) | ||||
Square of no. of children | 0.180*** (0.021) | |||||
No. of children aged 0 | −2.070*** (0.311) | −1.950*** (0.313) | −1.948*** (0.390) | −1.925*** (0.313) | ||
No. of children aged 1 to 5 | −1.083*** (0.105) | −0.969*** (0.108) | −1.146*** (0.140) | −0.944*** (0.108) | ||
No. of children aged 6 to 12 | −0.979*** (0.111) | −0.879*** (0.113) | −1.156*** (0.146) | −0.848*** (0.114) | ||
No. of children aged 13 and above | −0.783*** (0.128) | −0.701*** (0.128) | −0.962*** (0.155) | −0.676*** (0.129) | ||
Have boy (no = 0) | −0.327*** (0.096) | −0.325*** (0.095) | −0.680*** (0.140) | |||
Urban × no. of children aged 0 | −0.011 (0.638) | |||||
Urban × no. of children aged 1 to 5 | 0.421* (0.185) | |||||
Urban × no. of children aged 6 to 12 | 0.612*** (0.169) | |||||
Urban × no. of children aged 13 and above | 0.553*** (0.152) | |||||
Urban × have boy | 0.590*** (0.170) | |||||
LR chi-square | 775.8*** | 804.0*** | 795.0*** | 806.7*** | 827.8*** | 818.9*** |
df | 33 | 34 | 36 | 37 | 41 | 38 |
N | 16,466 | 16,466 | 16,466 | 16,466 | 16,466 | 16,466 |