Characteristics of the study population and numbers and proportions of carriers and non-carriers for each category
| Demographic characteristics | Whole cohort | Carriers | Non-carriers |
|---|---|---|---|
| Total number of patients | 30 424 | 6758 | 23 666 |
| Age at study entry | |||
| Median (IQ range) | 28 (22, 36) | 32 (25, 41) | 28 (22, 34) |
| Age at SCD test | |||
| Median (IQ range) | 29 (23, 36) | 28 (19, 36) | 30 (24, 35) |
| Gender | |||
| Male (%) | 5322 (17.5) | 2213 (32.7) | 3109 (13.1) |
| Female (%) | 25 102 (82.5) | 4545 (67.3) | 20 557 (86.9) |
| Ethnicity | |||
| White (%) | 8678 (28.5) | 484 (7.2) | 8194 (34.6) |
| Black (%) | 7343 (24.1) | 3608 (53.4) | 3735 (15.8) |
| Asian (%) | 3408 (11.2) | 228 (3.4) | 3180 (13.4) |
| Other (%) | 5377 (17.7) | 662 (9.8) | 4715 (19.9) |
| Not recorded (%) | 5618 (18.5) | 1776 (26.3) | 3842 (16.2) |
| Socioeconomic status | |||
| Quintile 1 (least deprived) | 1784 (8.3) | 325 (4.8) | 1459 (6.2) |
| Quintile 2 | 1998 (9.3) | 386 (5.7) | 1612 (6.8) |
| Quintile 3 | 2417 (11.3) | 602 (8.9) | 1815 (7.7) |
| Quintile 4 | 4125 (19.2) | 1179 (17.4) | 2946 (12.4) |
| Quintile 5 (most deprived) | 6876 (32.0) | 2254 (33.4) | 4622 (19.5) |
| Missing | 4278 (19.9) | 2012 (29.8) | 11 212 (47.4) |