Table 2 Characteristics of patients’ admissions by travel distance to hospitals
Characteristics | Travel distance to hospitals | Effect size (95% CI) | P value | ||
|---|---|---|---|---|---|
 ≤ 40 km |  > 40 km | Total | |||
30-day readmission rate, N(%) | 4106 (8.8%) | 1118 (7.6%) | 5224 (8.5%) | 0.91 (0.84—0.98) b | 0.007 |
90-day readmission rate, N(%) | 9052 (19.4%) | 2699 (18.2%) | 11,751 (19.1%) | 0.91 (0.87—0.96) b |  < 0.001 |
Annual readmission rate, N(%) | 18,773 (40.2%) | 5603 (37.9%) | 24,376 (39.7%) | 0.89 (0.85—0.93) b |  < 0.001 |
Inpatient expenditure, hundred CNY, mean (SD) | 6627.5 (7611.4) | 6696.5 (7882.8) | 6644.1 (7677.6) | 2.76% (1.49%−4.04%) a | 0.001 |
Length of stay, mean (SD) | 10.014 (7.8) | 10.127 (7.7) | 10.041 (7.8) | 2.04% (0.79%−3.30%) a |  < 0.001 |
Surgery, N(%) | 10,884 (23.3%) | 4353 (29.4%) | 15,237 (24.8%) | 1.09 (1.04–1.14) b |  < 0.001 |
Admitted departments, N(%) | |||||
 Internal Medicine | 26,860 (57.6%) | 7633 (51.6%) | 34,493 (56.1%) | Ref |  |
 Other | 10,489 (22.5%) | 2983 (20.2%) | 13,472 (21.9%) | 0.09 (0.04–0.14) b |  < 0.001 |
 TCM | 9310 (20.0%) | 4175 (28.2%) | 13,485 (21.9%) | 0.07 (0.00–0.15) b |  < 0.001 |