Table 3.
Variables for per- and post-matched samples for the intervention and control group
| Variable name | Pre-PSM approach | Post-PSM approach | ||||
|---|---|---|---|---|---|---|
| Control group | Intervention group | P value | Control group | Intervention group | P value | |
| Gender | ||||||
| Male | 92 (64.34%) | 80 (61.07%) | 0.576 | 68 (62.96%) | 70 (65.74%) | 0.670 |
| Female | 51 (35.66%) | 51 (38.93%) | 40 (37.04%) | 38 (34.26%) | ||
| Education level | ||||||
| High school or less | 46 (32.17%) | 38 (29.01%) | 0.837 | 37 (34.26%) | 34 (31.48%) | 0.927 |
| Some college or associates | 70 (48.95%) | 69 (52.67%) | 0.752 | 50 (46.30%) | 54 (50.00%) | 0.733 |
| Bachelors or higher (Refer) | 27 (18.88%) | 24 (18.32%) | 21 (19.44%) | 20 (18.52%) | ||
| Title | ||||||
| Not certified | 5 (3.50%) | 7 (5.34%) | 0.199 | 5 (4.63%) | 6 (5.56%) | 0.433 |
| Certified doctor | 25 (17.48%) | 32 (24.43%) | 0.123 | 20 (18.52%) | 25 (23.15%) | 0.282 |
| House physician | 25 (17.48%) | 35 (26.72%) | 0.090 | 19 (17.59%) | 27 (25.00%) | 0.202 |
| Doctor in charge of a case | 78 (54.55%) | 52 (39.69%) | 0.618 | 56 (51.85%) | 45 (41.67%) | 0.677 |
| Assistant director physician and above (Refer) | 10 (6.99%) | 5 (3.82%) | 8 (7.41%) | 5 (4.63%) | ||
| Monthly income (RMB yuan) | ||||||
| <1500 | 30 (20.98%) | 33 (25.19%) | 0.107 | 26 (24.07%) | 33 (30.56%) | 0.636 |
| 1501–2000 | 55 (38.46%) | 46 (35.11%) | 0.030 | 39 (36.11%) | 41 (37.96%) | 0.444 |
| 2001–2500 | 37 (25.87%) | 25 (19.08%) | 0.015 | 27 (25.00%) | 20 (18.52%) | 0.215 |
| 2501–3000 | 16 (11.19%) | 13 (9.92%) | 0.054 | 12 (11.11%) | 7 (6.48%) | 0.163 |
| >3001 (Refer) | 5 (3.50%) | 14 (10.69%) | 4 (3.70%) | 7 (6.48%) | ||
| Age (year) | 41 ± 9.92 | 38 ± 9.86 | 0.055 | 40 ± 10.74 | 39 ± 9.43 | 0.921 |
| Experience (year) | 20 ± 13.36 | 18 ± 10.82 | 0.088 | 20 ± 11.62 | 20 ± 10.19 | 0.822 |
Note: For continuous and categorical variables, median ± standard deviation and frequency (percent) were used, respectively. Differences between groups were tested by independent t test (Mann–Whitney U test) for continuous variables and by chi-square test for categorical variables. All p-values were two tailed.