Table 1

Association of probable postnatal depression with infant mortality

Postnatal depression	Number of infants (n)*	Total infant-months of follow-up	Infant deaths	Incidence mortality rate (per 1000 infant-months)	Crude rate ratio (95% CI)	Adjusted rate ratio (95% CI)†	p Value
Infant mortality from time of postnatal depression assessment to 6 months of age
Not depressed group	15 995	63 365.3	118	1.86	1	1	0.001
Depressed group	565	2273.4	12	5.28	2.83 (1.56 to 5.13)	2.86 (1.58 to 5.19)	0.001
Infant mortality from time of postnatal depression assessment to 12 months of age
Not depressed group	15 995	110 587.8	198	1.79			0.023
Depressed group	565	4158.3	14	3.36	1.88 (1.09 to 3.23)	1.88 (1.09 to 3.24)	0.023
Infant mortality from 7 days after postnatal depression assessment to 6 months of age
Not depressed group	15 989	63 336.9	112	1.77	1	1	0.002
Depressed group	564	2269.3	11	4.85	2.74 (1.47 to 5.09)	2.73 (1.46 to 5.09)
Infant mortality from 30 days after postnatal depression assessment to 6 months of age
Not depressed group	15 959	63 198.4	82	1.29	1	1	0.001
Depressed group	562	2259.9	9	3.98	3.07 (1.54 to 6.11)	3.17 (1.58 to 6.34)

*Infants at postnatal depression assessment.
†Adjusted for: mother's age, education, marital status, wealth quintile, ethnicity, religion, area of residence, parity, preterm birth, mode of delivery, perceived size of baby.