Table 1.

The effect of alcohol, cigarette, and drug exposure during pregnancy and child/adolescent BMI

	8–11 years			12–15 years			16–18 years
	df	χ2	P	df	χ2	P	df	χ2	P
Alcohol use	1	0.55	ns	1	0.001	ns	1	0.03	ns
Age	3	121.39	<0.0001	3	86.97	<0.0001	2	19.36	0.001
Gender	1	0.24	ns	1	0.06	ns	1	1.36	ns
Family type	1	1.06	ns	1	1.69	ns	1	3.11	ns
Sibling	1	0.20	ns	1	0.05	ns	1	0.34	ns
Depression in mother	1	0.90	ns	1	0.17	ns	1	0.09	ns
Gender × family type	1	1.38	ns	1	0.98	ns	1	1.76	ns
Cigarettes	1	9.94	0.002	1	8.16	0.004	1	4.00	0.05
Age	3	118.44	<0.0001	3	96.78	<0.0001	2	17.96	<0.0001
Gender	1	0.05	ns	1	0.009	ns	1	0.57	ns
Family type	1	0.11	ns	1	0.26	ns	1	1.08	ns
Sibling	1	0.55	ns	1	0.26	ns	1	0.12	ns
Depression in mother	1	0.01	ns	1	1.80	ns	1	0.15	ns
Gender × family type	1	0.47	ns	1	0.30	ns	1	0.61	ns
Drugs	1	0.08	ns	1	0.27	ns	1	8.29	0.004
Age	3	115.08	<0.0001	3	97.28	<0.0001	2	19.34	<0.0001
Gender	1	0.14	ns	1	0.02	ns	1	0.91	ns
Family type	1	0.95	ns	1	1.31	ns	1	1.82	ns
Sibling	1	0.10	ns	1	0.06	ns	1	0.07	ns
Depression in mother	1	0.22	ns	1	0.81	ns	1	0.24	ns
Gender × family type	1	1.01	ns	1	0.77	ns	1	1.27	ns

Exposure is presented as a dichotomous variable (no exposure versus any exposure). The same model was analyzed for data obtained at each developmental period.