Prevalence of Postpartum Depression Based on Diagnostic Interviews: A Systematic Review and Meta-Analysis

Table 1

Prevalence of different postpartum time points.

Postnatal time points	All depression		Major depression
	Number of studies	Prevalence(95% CI)	Number of studies	Prevalence(95% CI)
1 w	2	7.8% (0; 32.0%)	1	1.0% (0.1%; 3.5%)
2 w	1	18.8% (12.7%; 26.1%)	NA	NA
3 w	1	13.6% (7.3%; 22.6%)	1	5.7% (1.9%; 12.8%)
4 w	1	2.5% (0.5%; 7.2%)	1	2.5% (0.5%; 7.2%)
6 w	13	12.2% (9.1%; 16.2%)	7	6.4% (4.5%; 8.5%)
8 w	6	11.6.% (8.7%; 14.9%)	4	9.4% (5.1%; 14.6%)
12 w	8	10.7% (6.3%; 16.0%)	4	4.3% (0.0%; 13.7%)
16 w	1	3.8% (1.4%; 8.0%)	1	4.3% (1.6%; 9.1%)
20 w	1	10.9% (3.6%; 23.6%)	1	10.9% (3.2%; 23.6%)
24 w	4	6.8% (1.9%; 14.3%)	3	5.4% (0.5%; 14.4%)
30 w	1	4.2% (1.2%; 10.4%)	NA	NA
36 w	1	5.6% (2.4%; 10.7%)	NA	NA
52 w	3	12.3% (9.8%; 15.0%)	2	11.1% (7.4%; 15.6%)
Total	34	11.1% (9.1%; 13.3%)	20	6.3% (4.6%; 8.1%)

Note: NA: not applicable.