TABLE 2.

Mortality Rate Ratios (MRRs) for Women With Postpartum Psychiatric Disorders and for Four Comparison Groups^a

	Model 1b		Model 2c		Model 3d
Case Categories	MRR	95% CI	MRR	95% CI	MRR	95% CI
Postpartum-onset mothers	3.94	3.22–4.81	3.93	3.21–4.80	3.74	3.06–4.57
Non-postpartum-onset mothers	4.43	4.33–4.53	4.42	4.32–4.52	2.73	2.67–2.79
Non-postpartum-onset nonmothers	9.66	9.32–10.01	9.62	9.29–9.97	6.15	5.94–6.38
Mothers with no psychiatric history	1.00	Reference	1.00	Reference	1.00	Reference
Nonmothers with no psychiatric history	1.84	1.79–1.90	1.84	1.79–1.89	1.76	1.71–1.81

^aFull definitions of categories are provided in text.

^bAdjusted for calendar time.

^cAdjusted for calendar time and family history of mental illness.

^dAdjusted for calendar time, family history of mental illness, and medical comorbidity (Charlson comorbidity index).