Table S1. The socioeconomic status of the patients received survey.
| Socioeconomic status | N (%) | P value | |
|---|---|---|---|
| 2015 | 2018 | ||
| No. of patients | 473 | 489 | – |
| Occupation | 0.182a | ||
| Peasant | 438 (92.60) | 441 (90.18) | |
| Others | 35 (7.40) | 48 (9.82) | |
| Income resource | – | ||
| Labor income | 47 (9.94) | 33 (6.75) | |
| Salary | 23 (4.86) | 13 (2.66) | |
| Government subsidy | 444 (93.87) | 468 (95.71) | |
| Relative’s gift | 386 (81.61) | 407 (83.23) | |
| Education | 0.222b | ||
| Uneducated | 212 (44.82) | 196 (40.08) | |
| Primary school | 218 (46.09) | 250 (51.12) | |
| Junior high school | 27 (5.71) | 30 (6.14) | |
| High or vocational school | 16 (3.38) | 13 (2.66) | |
| Bachelor degree and above | 0 (0) | 0 (0) | |
| Annual household income | <0.001b | ||
| <3,000 RMB | 69 (14.59) | 25 (5.11) | |
| 3,000–5,000 RMB | 71 (15.01) | 30 (6.13) | |
| 5,001–10,000 RMB | 71 (15.01) | 113 (23.11) | |
| 10,001–15,000 RMB | 31 (6.55) | 61 (12.47) | |
| 15,001–20,000 RMB | 52 (10.99) | 49 (10.02) | |
| >20,000 RMB | 179 (37.84) | 211 (43.15) | |
a, χ2 test; b, ordinal logistic regression.