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Table 1 Demographic characteristics among middle-aged Chinese adults in 2015

From: The association between physical activity and body fat percentage with adjustment for body mass index among middle-aged adults: China health and nutrition survey in 2015

Variables Male Female
Normal weight (BMI < 24 kg/m2) Overweight/obese (BMI ≥ 24 kg/m2) Normal weight (BMI < 24 kg/m2) Overweight/obese (BMI ≥ 24 kg/m2)
N (number) 1293 (50.9%) 1247 (49.1%) 1668 (51.8%) 1555 (48.2%)
Region (N, %)
 Northern 192 (14.9%) 262 (21.0%) 275 (16.5%) 345 (22.2%)
 Central 378 (29.2%) 435 (34.9%) 556 (33.3%) 523 (33.6%)
 Southern 723 (55.9%) 550 (44.1%) 837 (50.2%) 687 (44.2%)
Age (year) 53.0 (46.3, 59.3) 50.9 (45.8, 57.0) 51.4 (45.3, 58.1) 51.8 (46.3, 58.1)
Education (N, %)
 Low 444 (38.5%) 517 (44.7%) 524 (38.7%) 426 (33.9%)
 Middle 473 (41.0%) 478 (41.3%) 561 (41.5%) 529 (42.1%)
 High 237 (20.5%) 163 (14.1%) 268 (19.8%) 302 (24.0%)
Married (N, %) 1223 (94.6%) 1208 (96.9%) 1571 (94.2%) 1460 (93.9%)
Household income (1000 yuan) 15.7 (7.2, 28.0) 18.0 (8.9, 31.8) 16.6 (7.3, 30.0) 15.7 (7.2, 27.9)
Energy intake (1000 kcal/day) 2.1 (1.7, 2.7) 2.2 (1.8, 2.8) 1.8 (1.4, 2.2) 1.8 (1.5, 2.3)
Energy for dietary fat (%) 35.1 (27.1, 44.3) 35.6 (28.2, 43.7) 35.4 (27.7, 43.7) 35.5 (27.6, 43.6)
BMI (kg/m2) 21.8 (20.3, 22.9) 26.3 (25.2, 27.9) 22.0 (20.7, 23.0) 26.4 (25.1, 28.2)
Current smoking (N, %) 782 (60.5%) 627 (50.3%) 30 (1.8%) 20 (1.3%)
Alcohol consumption (N, %) 745 (57.6%) 736 (59.0%) 100 (6.0%) 99 (6.4%)
Urbanization Index (score) 67.7 (54.2, 84.2) 74.9 (58.5, 89.3) 73.6 (57.1, 87.0) 73.3 (57.3, 87.2)
Sedentary activity time (hr/week) 15.9 (10.5, 27.0) 16.0 (10.5, 28.0) 14.0 (9.0, 24.5) 14.0 (10.0, 24.5)
  1. Values were expressed as medians (25th, 75th) or number and percentage (N, %)