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Table 1 Baseline characteristics of participants in the UK Biobank, the Atherosclerosis Risk in Communities study, and the Framingham Offspring Study

From: Associations of metabolic heterogeneity of obesity with the risk of dementia in middle-aged adults: three prospective studies

Variable

UKB

(n = 295,823)

ARIC

(n = 12,547)

FOS

(n = 2,004)

Age, y, mean (SD)

56.3 (5.9)

54.0 (5.7)

53.9 (5.9)

Female, No. (%)

163,675 (55.3)

6,831 (54.4)

1,056 (52.7)

White ethnicity, No. (%)

280,816 (95.0)

9,510 (75.8)

1,984 (99.0)

Tertiary education, No. (%)

98,528 (33.3)

5,747 (45.8)

1,204 (60.1)

TDI, No. (%)

 Quartile 1 (least deprived)

76,712 (25.9)

NA

NA

 Quartile 2

74,883 (25.3)

NA

NA

 Quartile 3

74,221 (25.1)

NA

NA

 Quartile 4 (most deprived)

70,007 (23.7)

NA

NA

Household income, No. (%)

  < 25,000 $

NA

4,459 (35.5)

321 (16.0)

 25,000–49,999 $

NA

4,782 (38.1)

1,002 (50.0)

  ≥ 50,000 $

NA

3,306 (26.3)

681 (34.0)

Smoking status, No. (%)

 Never smokers

30,919 (10.5)

5,332 (42.5)

677 (33.8)

 Former smokers

100,541 (34.0)

4,021 (32.0)

871 (43.5)

 Current smokers

164,363 (55.6)

3,194 (25.5)

456 (22.8)

Alcohol intake, units/week, mean (SD)

3.0 (3.3)

3.2 (7.1)

3.4 (5.0)

BMI, kg/m2, mean (SD)

27.5 (4.8)

27.5 (5.1)

27.1 (4.6)

WC, cm, mean (SD)

90.2 (13.4)

96.6 (13.5)

90.2 (14.3)

SBP, mmHg, mean (SD)

139.7 (19.2)

120.8 (18.5)

128.4 (17.5)

DBP, mmHg, mean (SD)

82.8 (10.6)

73.6 (11.1)

80.1 (9.6)

HbA1c, mmol/mol, mean (SD)

36.1 (6.6)

NA

NA

FBG, mg/dL, mean (SD)

NA

105.6 (32.5)

96.4 (25.9)

TG, mg/dL, mean (SD)

155.9 (91.4)

129.6 (88.7)

129.5 (105.8)

HDL-C, mg/dL, mean (SD)

56.7 (14.8)

51.9 (17.0)

50.3 (15.4)

  1. Abbreviations: UKB UK Biobank, ARIC Atherosclerosis Risk in Communities, FOS Framingham Offspring Study, TDI Townsend deprivation index, BMI Body mass index, WC Waist circumference, SBP Systolic blood pressure, DBP Diastolic blood pressure, HbA1c Glycated hemoglobin, FBG Fasting blood glucose, TG Triglyceride, HDL-C High-density lipoprotein cholesterol, NA Not applicable, SD Standard deviation