Table 3 Covariate balance test after propensity score matching
| Â | Standardized differences | Variance ratio | ||
|---|---|---|---|---|
Raw | Matched | Raw | Matched | |
Gender (ref = Male) | ||||
 Female | −0.1059 | −0.0389 | 0.8552 | 0.9437 |
Elderly (ref = No) | ||||
 Yes | 0.6012 | −0.0068 | 1.1173 | 0.9976 |
Education level (ref = Middle school or less) | ||||
 High school or more | −0.2761 | 0.0378 | 1.0598 | 0.9888 |
Presence of a spouse (ref = No) | ||||
 Yes | 0.0736 | 0.0476 | 0.9174 | 0.9434 |
Economically active (ref = No) | ||||
 Yes | −0.5098 | 0.0203 | 1.3894 | 0.9834 |
Living alone (ref = No) | ||||
 Yes | −0.0148 | 0.0061 | 0.9744 | 1.0110 |
Equivalized income (ref = 1st quintile) | ||||
 2nd quintile | 0.1051 | −0.0302 | 1.1395 | 0.9630 |
 3rd quintile | −0.0029 | 0.0121 | 0.9962 | 1.0183 |
 4th quintile | −0.2189 | 0.0295 | 0.6819 | 1.0491 |
 5th quintile | −0.1585 | −0.0187 | 0.7363 | 0.9662 |
Private health insurance (ref = No) | ||||
 Yes | −0.3315 | −0.0078 | 1.4291 | 1.0090 |
National health insurance (ref = No) | ||||
 Yes | 0.1971 | −0.0056 | 2.0315 | 0.9789 |
Presence of disabled persons (ref = No) | ||||
 Yes | 0.3362 | 0.0091 | 2.1813 | 1.0230 |