Table 4.
Absolute risks and adjusted odds ratios for serious mental illness associated with socioeconomic status, stratified by maternal age (N = 110 285a)
| Maternal age | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15–24 years | 25–34 years | 35–45 years | ||||||||||
| Socioeconomic status (deprivation quintile) | Nb | nc | % | AORd (95% CI) | Nb | nc | % | AORd (95% CI) | Nb | nc | % | AORd (95% CI) |
| During pregnancye | 20 176 | 13 | 0.06 | 60 722 | 48 | 0.08 | 29 387 | 44 | 0.15 | |||
| 1 (least deprivation) (N = 26 984) | 1843 | 1 | 0.05 | 1 | 15 732 | 7 | 0.04 | 1 | 9409 | 6 | 0.06 | 1 |
| 2 (N = 21 978) | 2479 | 0 | --- | --- | 12 655 | 7 | 0.06 | 1.24 (0.44 to 3.54) | 6844 | 5 | 0.07 | 1.14 (0.35 to 3.73) |
| 3 (N = 23 028) | 4052 | 3 | 0.07 | 1.37 (0.14 to 13.22) | 13 069 | 8 | 0.06 | 1.39 (0.50 to 3.82) | 5907 | 8 | 0.14 | 2.12 (0.73 to 6.11) |
| 4 (N = 21 771) | 5838 | 4 | 0.07 | 1.29 (0.14 to 11.53) | 11 452 | 14 | 0.12 | 2.84 (1.14 to 7.04) | 4481 | 12 | 0.27 | 4.28 (1.60 to 11.41) |
| 5 (most deprivation) (N = 16 524) | 5964 | 5 | 0.08 | 1.59 (0.19 to 13.64) | 7814 | 12 | 0.15 | 3.70 (1.45 to 9.42) | 2746 | 13 | 0.47 | 7.68 (2.92 to 20.24) |
| P-value for trend | 0.30f | 0.001f | <0.001f | |||||||||
| During the 9 months after pregnancye | 20 176 | 25 | 0.12 | 60 722 | 81 | 0.13 | 29 387 | 64 | 0.22 | |||
| 1 (least deprivation) (N = 26 984) | 1843 | 1 | 0.05 | 1 | 15 732 | 15 | 0.1 | 1 | 9409 | 13 | 0.14 | 1 |
| 2 (N = 21 978) | 2479 | 1 | 0.04 | 0.75 (0.05 to 11.98) | 12 655 | 17 | 0.13 | 1.42 (0.71 to 2.84) | 6844 | 9 | 0.13 | 0.95 (0.41 to 2.23) |
| 3 (N = 23 028) | 4052 | 3 | 0.07 | 1.38 (0.14 to 13.28) | 13 069 | 13 | 0.1 | 1.06 (0.50 to 2.22) | 5907 | 11 | 0.19 | 1.34 (0.60 to 3.00) |
| 4 (N = 21 771) | 5838 | 12 | 0.21 | 3.85 (0.50 to 29.66) | 11 452 | 25 | 0.22 | 2.35 (1.24 to 4.47) | 4481 | 15 | 0.33 | 2.42 (1.15 to 5.11) |
| 5 (most deprivation) (N = 16 524) | 5964 | 8 | 0.13 | 2.52 (0.31 to 20.16) | 7814 | 11 | 0.14 | 1.54 (0.70 to 3.36) | 2746 | 16 | 0.58 | 4.20 (2.01 to 8.78) |
| P-value for trend | 0.13f | 0.06f | <0.001f | |||||||||
Note: Serious mental illness includes bipolar disorder, schizophrenia or other related psychotic disorders.
5.3% (6172) of the original population (116 457) had no socioeconomic status recorded.
Number of women in each deprivation quintile.
Number of women with SMI.
Odds ratio and 95% CI adjusted for calendar time and number of previous known live births. SMI = serious mental illness.
Likelihood ratio test for interaction between deprivation quintile and age group: during pregnancy P = 0.79; after pregnancy P = 0.39.
P-value for trend from least to most deprivation excluding women with missing information for socioeconomic status. AOR = adjusted odds ratio.