Table 1

Baseline characteristics of the distressing and non-distressing groups

Distressing group (n=3180)Non-distressing group (n=9798)
CharacteristicsnPer centnPer centp Value
Regionp<0.001
 Rural157549.5407941.6
 Urban160550.5571958.4
Genderp<0.001
 Male72322.7315432.2
 Female245777.3664467.8
Age (years, mean (SD))46.7±13.746±13.30.941
BMIp<0.001
 Normal168052.9473748.3
 Underweight2016.35625.7
 Overweight92028.9308131.4
 Obesity37911.9141714.5
Educationp<0.001
 Primary school and below90828.5198320.2
 Junior middle school94129.6283628.9
 Senior middle school76123.9261426.7
 Undergraduate and above57017.9236424.1
Occupationp<0.05
 Intelligence73923.2279428.5
 Manual168453.0468447.8
 Retired2477.8108811.1
 Others50916.0123212.6
Marriage statusp<0.001
 Married247077.7792380.9
 Single49715.6141114.4
 Divorced/separated491.51281.3
 Widowed1645.13363.4
Drinkp<0.05
 Yes60018.9202120.6
 No258081.1777879.4
Family monthly income per capita (RMB)p<0.001
 <50066320.8131213.4
 500–99957218.0163816.7
 1000–1999108334.1352336.0
 2000–299957318.0216522.1
 >30002899.1116011.8
  • Values for certain characteristics may not be equal to the total number of participants in the distressing and non-distressing groups because of missing data and complex weighted computation.

  • BMI, body mass index.