Age-adjusted and multivariable ORs and 95% CIs of depressive symptomatology 1 month after childbirth according to maternal employment status, stratified by household equivalent income
| Maternal employment status | P value for interaction | ||||||||
| Regular workers | Dispatched workers | Part-time workers | Self-employed workers | Non-employed | Others | ||||
| Depressive symptomatology (EPDS score ≥9) | Lower household equivalent income: (n=38 571) | No at risk | 8106 | 726 | 10 549 | 1446 | 16 756 | 988 | 0.93 |
| No of cases | 778 | 89 | 1055 | 116 | 1692 | 112 | |||
| Age-adjusted OR (95% CI) | 1.00 | 1.31 (1.04 to 1.66)* | 1.05 (0.95 to 1.16) | 0.86 (0.70 to 1.06) | 1.06 (0.97 to 1.16) | 1.20 (0.97 to 1.48) | |||
| Multivariable ORs (95% CI)† | 1.00 | 1.04 (0.81 to 1.33) | 1.07 (0.96 to 1.19) | 0.90 (0.72 to 1.11) | 1.12 (1.01 to 1.23)* | 1.17 (0.93 to 1.46) | |||
| Higher household equivalent income: (n=38 251) | No at risk | 19 122 | 669 | 5437 | 994 | 11 113 | 916 | ||
| No of cases | 1410 | 58 | 434 | 71 | 846 | 80 | |||
| Age-adjusted OR (95% CI) | 1.00 | 1.19 (0.91 to 1.57) | 1.09 (0.98 to 1.22) | 0.97 (0.76 to 1.24) | 1.04 (0.95 to 1.13) | 1.20 (0.95 to 1.52) | |||
| Multivariable ORs (95% CI)† | 1.00 | 1.14 (0.85 to 1.51) | 1.12 (0.995 to 1.26) | 0.96 (0.74 to 1.25) | 1.11 (1.002 to 1.22)* | 1.26 (0.99 to 1.61) | |||
| Depressive symptomatology (EPDS score ≥13) | Lower household equivalent income: (n=38 571) | No at risk | 8106 | 726 | 10 549 | 1446 | 16 756 | 988 | 0.18 |
| No of cases | 144 | 12 | 208 | 19 | 320 | 19 | |||
| Age-adjusted OR (95% CI) | 1.00 | 0.92 (0.51 to 1.67) | 1.12 (0.90 to 1.38) | 0.79 (0.49 to 1.28) | 1.08 (0.88 to 1.31) | 1.08 (0.67 to 1.75) | |||
| Multivariable ORs (95% CI)† | 1.00 | 0.67 (0.36 to 1.22) | 1.10 (0.88 to 1.38) | 0.81 (0.49 to 1.32) | 1.10 (0.89 to 1.36) | 1.02 (0.62 to 1.67) | |||
| Higher household equivalent income: (n=38 251) | No at risk | 19 122 | 669 | 5437 | 994 | 11 113 | 916 | ||
| No of cases | 204 | 13 | 78 | 13 | 125 | 12 | |||
| Age-adjusted OR (95% CI) | 1.00 | 1.84 (1.04 to 3.23) | 1.35 (1.04 to 1.75)* | 1.22 (0.69 to 2.15) | 1.05 (0.84 to 1.32) | 1.23 (0.69 to 2.21) | |||
| Multivariable ORs (95% CI)† | 1.00 | 1.82 (1.02 to 3.26)* | 1.39 (1.06 to 1.83)* | 1.21 (0.68 to 2.16) | 1.12 (0.88 to 1.43) | 1.31 (0.72 to 2.38) | |||
*P<0.05.
†Adjusted for age, educational attainment, household equivalent income, parity, living with partner, living with parents, marital status, mental health status and residential area.
EPDS, Edinburgh Postnatal Depression Scale.