Descriptive characteristics (p<0.001, unless stated)
| Total UK Biobank | Stroke diagnosed by touchscreen questionnaire | Stroke diagnosed by nurse-led questionnaire | Transient ischaemic attack (nurse-led questionnaire) | |
|---|---|---|---|---|
| N=502 650 (100%) | N=6699 | N=7669 | N=1781 | |
| Hypertension (self-reported) | 135 787 (27.06) | 3770 (56.34) | 4257 (55.51) | 912 (51.21) |
| Smoking | ||||
| Current | 52 989 (10.92) | 1103 (16.48) | 1223 (15.95) | 191 (10.72) |
| Former | 173 203 (34.52) | 2851 (42.60) | 3250 (42.38) | 731 (41.04) |
| Never | 275 565 (54.92) | 2738 (40.91) | 3196 (41.67) | 859 (48.23) |
| Waist to hip ratio (tertiles) | ||||
| Lowest | NA | 1181 (17.63) | 1375 (17.93) | 399 (22.4) |
| Middle | NA | 1987 (29.66) | 2308 (30.10) | 574 (32.23) |
| Highest | NA | 3470 (51.80) | 3913 (51.02) | 801 (44.97) |
| Self-report diabetes | ||||
| Yes | 26 408 (5.26) | 1042 (15.57) | 1151 (15.01) | 178 (9.99) |
| Alcohol frequency | ||||
| Daily or almost daily | 101 794 (20.29) | 1217 (18.19) | 1437 (18.74) | 389 (21.84) |
| 3–4 times/week | 115 459 (23.01) | 1100 (16.44) | 1280 (16.69) | 340 (19.09) |
| 1–2/week | 129 325 (25.77) | 1560 (23.31) | 1800 (23.47) | 406 (22.8) |
| Upto 3/month | 55 871 (11.14) | 713 (10.65) | 821 (10.71) | 200 (11.23) |
| Special occasions | 58 032 (11.57) | 1010 (15.09) | 1132 (14.76) | 233 (13.08) |
| Never | 22 551 (4.49) | 476 (7.11) | 529 (6.9) | 108 (6.06) |
| Former | 18 115 (3.61) | 597 (8.92) | 651 (8.49) | 104 (5.84) |
| Oral contraceptive pill (N=272 047) | ||||
| Yes | 220 501 (81.05) | 1989 (73.83) | 2326 (74.22) | 621 (75.55) (p=0.002) |
NA, not applicable.