Skip to main content

Table 1 Characteristics of participants aged 60 or above from the three population-based datasets

From: Tea consumption and serum uric acid levels among older adults in three large-scale population-based studies in China

  WGDS CHNS CLHLS
Survey year(s) 2014–2018 2009 2008–2014
Sample size at baseline 4579 2440 1236
Sample size at follow-up 3870 420
Mean age at baseline, years (SD) 67.7 (6.3) 68.9 (6.8) 86.6 (12.3)
Age range at baseline, years 60–93 60–99 62–110
Men, n (%) 2200 (48.0) 1149 (47.1) 493 (39.9)
BMI at baseline, mean (SD) 23.3 (2.6) 23.3 (3.7) 20.0 (3.8)
Diabetes at baseline, n (%) 367 (8.0) 331 (13.6) 133 (10.8)
Hypertension at baseline, n (%) 2463 (53.8) 670 (27.5) 173 (14.0)
Habitual tea drinker, n (%) 1571 (34.3) 911 (37.3) 435 (35.2)
Current cigarette smoker, n (%) 1193 (26.1) 621 (25.5) 266 (21.5)
Current alcohol drinker, n (%) 1035 (22.6) 637 (26.1) 233 (18.9)
Fasting plasma glucose at baseline, mmol/L, mean (SD) 5.6 (1.1) 5.7 (1.7) 5.4 (1.9)
Type of tea, n (%)
 Green tea 1408 (89.6)
 Black or Oolong tea 91 (5.8)
 other 72 (4.6)
Frequency, n (%)
  ≥ 6 times/week 1398 (88.99) 717 (78.9) 265 (60.9)
  < 6 times/week 173 (11.01) 192 (21.1) 170 (39.1)
Education level, n (%)
 Primary education and below 3954 (86.4) 1749 (71.7) 1165 (94.3)
 Secondary schooling and above 625 (13.6) 691 (28.3) 71 (5.7)
  1. BMI body mass index; SD, standard deviation, WGDS Weitang Geriatric Diseases Study, CHNS China Health and Nutrition Survey, CLHLS Chinese Longitudinal Healthy Longevity Survey