. Author manuscript; available in PMC: 2010 Mar 8.

Published in final edited form as: Hum Genet. 2008 Dec 3;125(1):41–52. doi: 10.1007/s00439-008-0603-8

Table 5.

Estimated odds ratio and 95% confidence interval (CI) (adjusted for maternal age and race) for age of maternal grandmother at birth of mother using enrolled mothers from ADSP and NDSP

	All mothers			Dichotomized by mother’s age

				<30 years		≥30 years

	N	Mean grand-maternal age (SD)	OR (95% CI)	N	OR (95% CI)	N	OR (95% CI)
Controls	1,325	25.7 (6.3)	Referent	728	Referent	597	Referent
Cases
All	1,176	25.5 (5.8)	0.98 (0.97–1.00)	388	0.98 (0.95–1.00)	788	0.99 (0.98–1.01)
Maternal errors	970	25.7 (6.2)	0.98 (0.97–1.00)	294	0.97 (0.95–1.00)	676	0.99 (0.97–1.01)
MI	727	25.7 (6.3)	0.98 (0.97–1.00)	221	0.97 (0.95–1.00)	506	0.99 (0.97–1.01)
MII	222	25.7 (6.5)	0.98 (0.96–1.01)	67	0.96 (0.92–1.01)	155	0.99 (0.96–1.02)

The sample sizes vary slightly from Table 2 because of missing grand-maternal ages