Table 2 Participant sociodemographic baseline characteristics

Age group ^a

1,413,576 (64.9%)

385,474 (17.7%)

259,125 (11.9%)

119,481 (5.5%)

2,177,656

Female

698,158 (49.4%)

199,914 (51.9%)

151,462 (58.5%)

84,437 (70.7%)

1,133,971 (52.1%)

Asian

52,703 (5.1%)

11,419 (4.1%)

4521 (2.7%)

916 (1.4%)

69,559 (4.5%)

Black

29,387 (2.8%)

5577 (2.0%)

2350 (1.4%)

440 (0.7%)

37,754 (2.4%)

Mixed/Other

15,461 (1.5%)

2480 (0.9%)

1110 (0.6%)

277 (0.4%)

19,328 (1.3%)

White

937,135 (90.6%)

260,473 (93.0%)

160,063 (95.3%)

63,054 (97.5%)

1,420,725 (91.8%)

Missing^c

378,890 (26.8%)

105,525 (27.4%)

91,081 (35.2%)

54,794 (45.9%)

630,290 (28.9%)

Urban

1,102,809 (78.0%)

294,247 (76.3%)

200,358 (77.3%)

91,492 (76.6%)

1,688,906 (77.6%)

Residential care

1019 (0.1%)

1708 (0.4%)

5371 (2.1%)

9121 (7.6%)

17,219 (0.8%)

 1 (Most deprived)

193,552 (13.7%)

49,320 (12.8%)

34,151 (13.2%)

14,894 (12.5%)

291,917 (13.4%)

 2

220,674 (15.6%)

60,287 (15.6%)

41,887 (16.2%)

19,592 (16.4%)

342,440 (15.7%)

 3

280,969 (19.9%)

79,288 (20.6%)

54,244 (20.9%)

25,806 (21.6%)

440,307 (20.2%)

 4

340,796 (24.1%)

93,998 (24.4%)

62,573 (24.2%)

28.815 (24.1%)

526,182 (24.2%)

 5 (Least deprived)

377,585 (26.7%)

102,581 (26.6%)

66,270 (25.6%)

30,374 (25.4%)

576,810 (26.5%)

 1 (Most deprived)

199,722 (14.1%)

50,167 (13.0%)

34,440 (13.3%)

15,493 (13.0%)

299,822 (13.8%)

 2

217,183 (15.4%)

58,934 (15.3%)

42,894 (16.6%)

19,930 (16.7%)

338,941 (15.6%)

 3

269,450 (19.1%)

76,828 (19.9%)

55,166 (21.3%)

27,233 (22.8%)

428,677 (19.7%)

 4

336,857 (23.8%)

93,684 (24.3%)

62,160 (24.0%)

29,063 (24.3%)

521,764 (24.0%)

 5 (Least deprived)

390,364 (27.6%)

105,861 (27.5%)

64,465 (24.9%)

27,762 (23.2%)

588,452 (27.0%)