Table 3.

Effect by gestational age (adjusted ORs and 95% CI)

	Early preterm PA (<34)	Late preterm PA (34–36)	Term PA (>=37)
	Cases n = 254	Cases n = 130	Cases n = 237
Any CA
None	Ref	Ref	Ref
Any	1.25 (0.92, 1.68)	0.75 (0.50, 1.11)	1.05 (0.77, 1.43)
Type of CA
No CA	Ref	Ref	Ref
Physical abuse only	1.18 (0.86, 1.62)	0.70 (0.45, 1.07)	1.07 (0.78, 1.48)
Sexual abuse only	0.61 (0.17, 2.18)	1.40 (0.44, 4.45)	0.93 (0.30, 2.92)
Physical and sexual abuse	2.17 (1.16, 4.05)*	0.85 (0.32, 2.29)	0.95 (0.43, 2.09)
Number of CA events
0	Ref	Ref	Ref
1	0.85 (0.56, 1.30)	0.63 (0.36, 1.11)	0.75 (0.48, 1.16)
2	1.31 (0.82, 2.10)	0.63 (0.31, 1.28)	1.06 (0.65, 1.73)
3+	1.87 (1.22, 2.87)**	1.06 (0.59, 1.89)	1.57 (1.01, 2.43)*
Test for trend	0.0058	0.55	0.11
Any IPV
None	Ref	Ref	Ref
Any	1.18 (0.87, 1.59)	1.32 (0.90, 1.94)	1.09 (0.81, 1.48)
IPV severity
None (0)	Ref	Ref	Ref
Infrequent (1–2)	1.02 (0.72, 1.46)	1.19 (0.76, 1.86)	1.13 (0.80, 1.60)
Sometimes (3–7)	1.29 (0.82, 2.04)	1.57 (0.89, 2.75)	0.95 (0.57, 1.57)
Often (8–39)	1.66 (0.96, 2.88)	1.43 (0.67, 3.04)	1.19 (0.65, 2.18)
Test for Trend	0.065	0.11	0.68
IPV and CA
No or rare abuse	Ref	Ref	Ref
Severe CA only	1.47 (1.00, 2.15)*	0.78 (0.45, 1.36)	1.32 (0.90, 1.93)
Severe IPV only	1.20 (0.78, 1.86)	1.23 (0.73, 2.09)	0.90 (0.56, 1.43)
Severe CA and IPV	2.85 (1.56, 5.20)**	1.80 (0.81, 4.02)	1.62 (0.82, 3.22)

Adjusted OR is adjusted for age, education, and continuous parity

^*P < 0.05;

^**P <0.01