Table 3 Logistic regression analysis of self-rated physical health (All respondents)

Air pollution (ref: not serious)

1.003

[0.869, 1.157]

1.029

[0.869, 1.219]

0.993

[0.861, 1.147]

Green space shortage (ref: not serious)

0.867*

[0.750, 1.002]

0.866*

[0.749, 1.000]

1.016

[0.847, 1.218]

Water pollution (ref: not serious)

1.047

[0.911, 1.203]

1.045

[0.909, 1.201]

1.044

[0.908, 1.200]

Freshwater resource shortage (ref: not serious)

0.986

[0.862, 1.129]

0.986

[0.861, 1.128]

0.986

[0.862, 1.129]

Physical activities

Doing physical exercise (ref: infrequently)

1.092

[0.959, 1.243]

1.125

[0.951, 1.331]

1.216**

[1.047, 1.413]

Controlled variables

Age

0.959***

[0.955, 0.962]

0.959***

[0.955, 0.962]

0.959***

[0.955, 0.962]

Gender (ref: male)

0.776***

[0.694, 0.868]

0.776***

[0.694, 0.869]

0.778***

[0.695, 0.870]

Marital status (ref: single, divorce, widowed.)

0.966

[0.829, 1.126]

0.967

[0.830, 1.126]

0.972

[0.834, 1.132]

Educational attainments (ref: junior high school and below)

Senior high school

1.266***

[1.087, 1.475]

1.264***

[1.086, 1.473]

1.263***

[1.084, 1.470]

Bachelor degree and above

1.089

[0.908, 1.307]

1.088

[0.907, 1.305]

1.093

[0.910, 1.311]

Logarithmic of annual household income

1.349***

[1.264, 1.440]

1.349***

[1.264, 1.440]

1.344***

[1.259, 1.435]

Hukou status (ref: non-local hukou)

0.904

[0.733, 1.114]

0.905

[0.734, 1.115]

0.908

[0.736, 1.119]

Insurance schemes (ref: have joined neither schemes)

Have joined both BMI and PCMI schemes

1.106

[0.839, 1.459]

1.110

[0.841, 1.463]

1.125

[0.853, 1.484]

Have joined BMI schemes but not PCMI schemes

1.075

[0.868, 1.332]

1.077

[0.869, 1.334]

1.087

[0.877, 1.347]

Have joined PCMI schemes but not BMI schemes

2.271**

[1.145, 4.504]

2.280**

[1.149, 4.525]

2.333**

[1.177, 4.627]

Interaction in relation to evaluation of living environment

Doing physical exercise frequently × Serious air pollution (ref: Doing physical exercise frequently × No serious air pollution)

0.932

[0.727, 1.196]

Doing physical exercise frequently × Serious green space shortage (ref: Doing physical exercise frequently × No serious green space shortage)

0.665***

[0.503, 0.879]

N

6571

6571

6571

Log likelihood

-3684.023

-3683.871

-3679.925

Chi-squared

881.210***

881.515***

889.405***