Descriptive characteristics of women contributing cross-sectional data with and without the inclusion of those with missing Townsend score
| Characteristic | Primary analysis | Exclusion of women with missing data |
| Overall (n) | 2 705 638 | 2 144 405 |
| Country (n (%)) | ||
| England | 1 885 015 (69.7) | 1 555 734 (72.6) |
| Scotland | 405 013 (15.0) | 310 706 (14.5) |
| Wales | 314 468 (11.6) | 201 680 (9.4) |
| Northern Ireland | 101 142 (3.7) | 76 285 (3.6) |
| Townsend, quintile (n (%)) | ||
| Missing | 561 233 (20.7) | N/A |
| 1 (least deprived) | 482 529 (17.8) | 482 529 (22.5) |
| 2 | 427 003 (15.8) | 427 003 (19.9) |
| 3 | 470 492 (17.4) | 470 492 (21.9) |
| 4 | 446 378 (16.5) | 446 378 (20.8) |
| 5 (most deprived) | 318 003 (11.8) | 318 003 (14.8) |
| Age at cohort entry (years) (median (IQR)) | 28.0 (20.5–35.8) | 28.0 (20.5–36.1) |
| Cohort follow-up (years) (median (IQR)) | 4.9 (2.7–9.1) | 5.2 (2.9–9.4) |
IQR, interquartile range; N/A, not applicable.