Table 6. Incident rate ratio comparing pregnancy status for all periods.

Pregnancy and Maternity Status	Crude			Adjusted Age			Adjusted Age and Site
	HRR	95% CI		HRR	95% CI		HRR	95% CI
Maternity Status
Not pregnant	1			1			1
Pregnant	0.80	(0.71-0.90)		0.64	(0.57-0.73)		0.77	(0.68-0.88)
<1 year post partum	0.96	(0.86-1.06)		0.78	(0.70-0.87)		0.92	(0.84-1. 03)
Pregnancy Status
Not pregnant	1			1			1
Pregnant	0.81	(0.71-0.91)		0.69	(0.61-0.78)		0.79	(0.70-0.89)