Table 2. Baseline characteristics compared between NHS-HC and no NHS-HC group in dataset before weighting
CharacteristicaOverall,n = 158 645No NHS-HC group,n = 116 056NHS-HC group,n = 42 589P-value
Year of birth, mean (SD) 1968.69 (9.92)1969.34 (10.04)1966.92 (9.36)<0.001
Sex, female 76 526 (48.2)55 315 (47.7)21 211 (49.8)<0.001
IMD quintile <0.001
1 (most deprived)29 065 (18.3)21 582 (18.6)7483 (17.6)
271 760 (45.2)52 738 (45.4)19 022 (44.7)
344 136 (27.8)31 875 (27.5)12 261 (28.8)
411 414 (7.2)8211 (7.1)3203 (7.5)
5 (least deprived)2270 (1.4)1650 (1.4)620 (1.5)
Smoking status 0.038
Never106 151 (66.9)77 444 (66.7)28 707 (67.4)
Former3428 (2.2)2530 (2.2)898 (2.1)
Current49 066 (30.9)36 082 (31.1)12 984 (30.5)
Enrolment <0.001
2009–201167 159 (42.3)44 086 (38.0)23 073 (54.2)
2012–201423 992 (15.1)17 018 (14.7)6974 (16.4)
2015–201723 009 (14.5)17 121 (14.8)5888 (13.8)
2018–202023 599 (14.9)19 542 (16.8)4057 (9.5)
2021–202420 886 (13.2)18 289 (15.8)2597 (6.1)
Family history of CHD 2401 (1.5)978 (0.8)1423 (3.3)<0.001
Ethnicity <0.001
White95 298 (60.1)70 575 (60.8)24 723 (58.1)
Black37 345 (23.5)25 997 (22.4)11 348 (26.6)
Asian11 491 (7.2)8571 (7.4)2920 (6.9)
Mixed7136 (4.5)5368 (4.6)1768 (4.2)
Other7375 (4.6)5545 (4.8)1830 (4.3)
Primary care network <0.001
113 699 (8.6)7422 (6.4)6277 (14.7)
211 164 (7.0)8211 (7.1)2953 (6.9)
325 378 (16.0)19 787 (17.0)5591 (13.1)
425 069 (15.8)18 356 (15.8)6713 (15.8)
512 269 (7.7)9118 (7.9)3151 (7.4)
622 320 (14.1)17 303 (14.9)5017 (11.8)
713 297 (8.4)9960 (8.6)3337 (7.8)
815 751 (9.9)11 983 (10.3)3768 (8.8)
919 698 (12.4)13 916 (12.0)5782 (13.6)
BMI <0.001
Normal weight69 505 (43.8)51 451 (44.3)18 054 (42.4)
Obese30 932 (19.5)22 628 (19.5)8304 (19.5)
Overweight55 225 (34.8)39 663 (34.2)15 562 (36.5)
Underweight2983 (1.9)2314 (2.0)669 (1.6)
Alcohol, units per week <0.001
None48 601 (30.6)34 972 (30.1)13 629 (32.0)
>353393 (2.1)2464 (2.1)929 (2.2)
1–1493 051 (58.7)69 066 (59.5)23 985 (56.3)
15–3513 600 (8.6)9554 (8.2)4046 (9.5)
Index age, years <0.001
40–54138 735 (87.4)101 730 (87.7)37 005 (86.9)
55–6415 000 (9.5)10 375 (8.9)4625 (10.9)
65–744910 (3.1)3951 (3.4)959 (2.3)
Cancer 2742 (1.7)2026 (1.7)716 (1.7)0.394
Serious mental illness 3245 (2.0)2441 (2.1)804 (1.9)0.008
Rheumatoid arthritis 617 (0.4)432 (0.4)185 (0.4)0.086
Systemic erythematous lupus 213 (0.1)155 (0.1)58 (0.1)0.961
Liver disease 728 (0.5)559 (0.5)169 (0.4)0.030
Main spoken language not English 37 322 (23.5)28 068 (24.2)9254 (21.7)<0.001
  • aData are n (%) unless otherwise specified. BMI = body mass index. CHD = coronary heart disease. IMD = Index of Multiple Deprivation. NHS-HC = NHS Health Check. SD = standard deviation.