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Table 1 Descriptive statistics for the study variables

From: Exploring the links between population density, lifestyle, and being overweight: secondary data analyses of middle-aged and older Chinese adults

Variable Total sample Overweight sample None-overweight sample
Proportion/median (P25-P75) Proportion/median (P25-P75) Proportion/median (P25-P75)
Dependent variable
BMI status (ref: BMI < 24 kg/m2)
 Overweight (BMI ≥ 24 kg/m2) 0.41   
Independent variables
 Motorized traveller (ref: No)    
 Yes 0.09 0.16 0.04
 Time spent on weekly physical exercise (hours) 28.50 (14.00–38.00) 21.00 (3.00–29.00) 28.00 (14.00–46.00)
 Population density (person/km2) 725.62 (257.31–71,392.85) 897.88 (379.74–95,000.00) 574.99 (221.02–15,000.00)
Control variables (demographic and socioeconomic variables)
 Sex (ref: Female)    
 Male 0.45 0.39 0.49
Age (years) 58.00 (51.00–68.00) 57.00 (49.00–62.00) 58.00 (52.00–69.00)
Marital status (ref: Single, divorced, or widowed)
 Married 0.88 0.91 0.86
Education (ref: Primary school or below)
 Junior high school 0.20 0.23 0.19
 Senior high school or above 0.11 0.14 0.08
Living area (ref: Rural area)
 Urban area 0.38 0.46 0.32
Eating frequency (ref: ≤ three times a day)
 > three times a day 0.87 0.89 0.86
Smoking history (ref: Non-smoker)
 Smoker 0.38 0.31 0.42
Drinking history (ref: Non-drinker)
 Drinking 0.32 0.29 0.35
Medical insurance status (ref: No)
 Yes 0.93 0.93 0.94
Physical health status (ref: Do not have a disease)
 Have a disease 0.65 0.71 0.61
 Annual household income per capita (Chinese Yuan) 4794.00 (1210.00–57,926.39) 4340.00 (1400–60,500.00) 3410.00 (1040.00–20,200)
 Annual neighbourhood income per capita (Chinese Yuan) 3018.00 (1423.00–8800.00) 3018.00 (1500.00–12,000) 3000.00 (1400.00–20,000.00)
Neighbourhood sports facilities (ref: No)
 Yes 0.64 0.65 0.64
Neighbourhood sports groups (ref: No)
 Yes 0.52 0.55 0.50