Table 4 The difference in covariate variables for the URBMI insured residents and uninsured residents before and after the matching (%)
Before matching | After matching | |||||||
|---|---|---|---|---|---|---|---|---|
Insured | Uninsured | Standardized bias (%) | p | Insured | Uninsured | Standardized bias (%) | p | |
Annual personal expenditure | 8.72 | 8.65 | 12.0 | 0.010 | 8.71 | 8.72 | -1.3 | 0.783 |
Female | 58.2 | 56.6 | 3.2 | 0.480 | 58.5 | 58.5 | 0.0 | 1.000 |
45-59 | 23.3 | 21.8 | 3.6 | 0.432 | 23.5 | 23.0 | 1.2 | 0.809 |
60+ | 16.4 | 15.4 | 2.9 | 0.520 | 16.4 | 16.5 | -0.4 | 0.945 |
Health status | 4.39 | 4.39 | -1.1 | 0.810 | 4.38 | 4.38 | 0.0 | 0.999 |
Married | 63.2 | 61.5 | 3.4 | 0.453 | 63.5 | 61.5 | 4.0 | 0.430 |
Other marital status | 11.0 | 10.4 | 1.9 | 0.681 | 10.8 | 11.6 | -2.5 | 0.628 |
Primary school | 8.2 | 9.4 | -4.4 | 0.340 | 8.3 | 7.2 | 4.1 | 0.391 |
Junior middle school | 27.9 | 31.7 | -8.3 | 0.070 | 28.5 | 29.9 | -3.1 | 0.538 |
Senior middle school | 43.2 | 35.7 | 15.3 | 0.001 | 42.4 | 42.4 | 0.0 | 1.000 |
Diploma | 8.7 | 7.3 | 5.1 | 0.257 | 8.5 | 9.0 | -1.9 | 0.718 |
College degree or above | 4.1 | 7.2 | -13.5 | 0.004 | 4.2 | 3.6 | 2.3 | 0.599 |
Retired | 7.6 | 7.8 | -0.4 | 0.923 | 7.8 | 8.6 | -2.9 | 0.577 |
Student | 13.9 | 17.6 | -10.1 | 0.029 | 14.2 | 14.6 | -1.1 | 0.828 |
Unemployed | 51.3 | 55.1 | -7.5 | 0.102 | 52.1 | 51.4 | 1.6 | 0.760 |
Guanzhong | 95.7 | 89.5 | 23.6 | 0.000 | 95.6 | 95.8 | -1.0 | 0.801 |
Shannan | 0.0 | 0.5 | -9.9 | 0.049 | 0.0 | 0.0 | 0.0 | 1.000 |
Commercial health insurance | 4.6 | 4.2 | 1.6 | 0.718 | 4.7 | 4.0 | 3.2 | 0.533 |
Household population | 1.17 | 1.20 | -7.8 | 0.086 | 1.18 | 1.19 | -2.1 | 0.691 |