Table 1 Baseline characteristics of women and men in UK Biobank
Characteristics | Women (n = 273,262) | Men (n = 228,964) |
|---|---|---|
Age (years) (mean (SD)) | 56.3 (8.0) | 56.7 (8.2) |
Ethnicity: | ||
 White | 257,320 (94.2) | 215,111 (93.9) |
 Other | 14,678 (5.8) | 12,344 (6.1) |
Blood pressure (mmHg): | ||
 Systolic (mean (SD)) | 135.3 (19.2) | 140.9 (17.5) |
 Diastolic (mean (SD)) | 80.7 (10.0) | 84.1 (10.0) |
 AHA hypertension categories: | ||
  Normal | 55,316 (20.2) | 20,020 (8.7) |
  Elevated | 35,561 (13.0) | 26,008 (11.4) |
  Stage 1 hypertension | 72,038 (26.4) | 62,661 (27.4) |
  Stage 2 hypertension | 109,578 (40.1) | 119,722 (52.3) |
Smoking status: | ||
 Never smoker | 161,979 (59.3) | 111,404 (48.7) |
 Former smoker | 85,412 (31.3) | 87,535 (38.2) |
 Current smoker | 24,359 (8.9) | 28,593 (12.5) |
 By smoking intensity: | ||
  1–9 cigarettes per day | 4397 (18.1) | 2805 (9.8) |
  10–19 cigarettes per day | 8440 (34.7) | 6996 (24.5) |
  ≥ 20 cigarettes per day | 5590 (22.9) | 7908 (27.7) |
  Not reported | 5932 (24.4) | 10,884 (38.1) |
Diabetes: | ||
  Type 1 diabetes* | 564 (0.2) | 652 (0.3) |
  Type 2 diabetes | 9946 (3.6) | 15,514 (6.8) |
Body mass index (kg/m2): | ||
 Body mass index (mean (SD)) | 27.1 (5.2) | 27.8 (4.2) |
 BMI categories: | ||
  Underweight (< 18.5) | 2079 (0.8) | 547 (0.2) |
  Healthy weight (18.5–24.9) | 105,618 (38.7) | 56,710 (24.8) |
  Overweight (25.0–29.9) | 99,828 (36.5) | 112,175 (49.0) |
  Obese (30.0 and above) | 64,282 (23.5) | 57,888 (25.3) |
Waist circumference (cm) (mean (SD)) | 84.7 (12.6) | 97.0 (11.4) |
Waist-to-hip ratio (mean (SD)) | 0.82 (0.07) | 0.94 (0.07) |
Waist-to-height ratio (mean (SD)) | 0.52 (0.08) | 0.55 (0.07) |
History of stroke | 3143 (1.2) | 4500 (2.0) |
Socioeconomic status (Townsend score thirds): | ||
 High | 138,673 (50.7) | 115,578 (50.5) |
 Middle | 81,866 (30.0) | 66,667 (29.1) |
 Low | 52,396 (19.2) | 46,423 (20.3) |
Lipids (mmol/L): | ||
 Total cholesterol (mean (SD)) | 5.9 (1.1) | 5.5 (1.1) |
 HDL (mean (SD)) | 1.6 (0.4) | 1.3 (0.3) |
 LDL (mean (SD)) | 3.6 (0.9) | 3.5 (0.9) |
 Elevated cholesterol | 93,062 (34.1) | 54,507 (23.8) |
Drug use: | ||
 Antihypertensive drugs | 38,406 (14.1) | 47,966 (20.9) |
 Lipid-lowering drugs | 29,503 (10.8) | 45,731 (20.0) |