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Table 1 Baseline characteristics of women and men in UK Biobank

From: Sex differences in the association between major cardiovascular risk factors in midlife and dementia: a cohort study using data from the 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)
  1. SD standard deviation, AHA American Heart Association, HDL high-density lipoprotein, LDL low-density lipoprotein
  2. *Defined as diagnosis before the age of 30 and receiving insulin treatment