Table 5.

Risk ratios of child with ASD by year of intimate partner abuse with respect to birth year, including all years from 10 years before to 4 years after the birth year in a single model, Nurses’ Health Study II, 1963–2002, United States (N=54235 controls, N=451 cases)^†

	% (N)	Risk ratio (95% confidence interval)
IPV in any of the 8, 9, 10 years before the birth year
No	93.4 (49915)	1.0 [Reference]
Yes	6.6 (3516)	0.99 (0.70, 1.38)
IPV in any of the 5, 6, 7 years before the birth year
No	91.0 (48615)	1.0 [Reference]
Yes	9.0 (4816)	1.14 (0.82, 1.58)
IPV in any of the 2, 3, 4 years before the birth year
No	87.9 (46951)	1.0 [Reference]
Yes	12.1 (6480)	1.26 (0.91, 1.74)
IPV in the year before the birth year
No	89.8 (47996)	1.0 [Reference]
Yes	10.2 (5435)	1.68 (1.08, 2.61)*
IPV in the birth year
No	88.3 (47198)	1.0 [Reference]
Yes	11.7 (6233)	0.69 (0.39, 1.21)
IPV in the year after the birth year
No	88.2 (47097)	1.0 [Reference]
Yes	11.9 (6334)	0.83 (0.48, 1.43)
IPV in any of the 2,3,4 years after the birth year
No	84.1 (44947)	1.0 [Reference]
Yes	15.9 (8484)	1.06 (0.73, 1.52)

^†Model adjusted for child’s sex, child’s birth year, maternal age at child’s birth, maternal childhood socioeconomic status, and maternal exposure to childhood abuse.