AIC | 100474 | 100476 | 100480 |
Change in male proportion | 0.9974† (0.9956 to 0.9991) | 0.9974 (0.9956 to 0.9991) | 0.9974 (0.9950 to 0.9998) |
Likelihood ratio test | p = 0.004 | p = 0.01 | p = 0.03 |
Mother’s age | | | |
⩽17 | 1.0005 (0.9975 to 1.0035) | | |
18–19 | 1.0006 (0.9985 to 1.0027) | | |
20–24 | 1 (reference category) | | |
25–29 | 1.0024 (1.0010 to 1.0039) | | |
30–39 | 1.0031 (1.0013 to 1.0049) | | |
⩾40 years | 1.0035 (0.9988 to 1.0081) | | |
Likelihood ratio test | p = 0.02 | | |
Father’s age | | | |
⩽17 | 1.0014 (0.9961 to 1.0068) | | |
18–19 | 0.9994 (0.9964 to 1.0024) | | |
20–24 | 1 (reference category) | | |
25–29 | 0.9987 (0.9971 to 1.0002) | | |
30–39 | 0.9970 (0.9952 to 0.9988) | | |
⩾40 | 0.9965 (0.9938 to 0.9991) | | |
Likelihood ratio test | p = 0.03 | | |
Birth order | | | |
First | 1 (reference category) | | |
Second | 0.9964 (0.9952 to 0.9977) | | |
Third | 0.9962 (0.9946 to 0.9978) | | |
Fourth or higher | 0.9906 (0.9889 to 0.9923) | | |
Likelihood ratio test | p<0.001 | | |
Race/ethnicity | | | |
White | 1 (reference category) | | |
Black | 0.9915 (0.9898 to 0.9933) | | |
Chinese | 1.0095 (1.0054 to 1.0137) | | |
Japanese | 1.0015 (0.9962 to 1.0068) | | |
Native American | 0.9922 (0.9867 to 0.9978) | | |
Other | 1.0083 (1.0060 to 1.0106) | | |
Likelihood ratio test | p<0.001 | | |