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Table 2 Participant sociodemographic baseline characteristics

From: The dynamics of frailty development and progression in older adults in primary care in England (2006–2017): a retrospective cohort profile

  Age Group Total (%)
50–64 65–74 75–84 ≥85
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%)
Ethnicity b
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%)
Missingc 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%)
IMD quintile
 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%)
IDAOPI quintile
 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%)
  1. a% as proportion of total cohort
  2. b% as proportion of known values
  3. cmissing values as % of cohort