Table 1 Comparison of clinicopathological characteristics between the RRS and non-RRS groups
Variable | RRS group n = 93,293 | Non-RRS group n = 838,481 | P-value |
|---|---|---|---|
Age, year | 65.6 (17.5) | 59.4 (18.5) | < 0.001 |
Male sex | 36,566 (39.2) | 364,259 (43.4) | < 0.001 |
Having a job | 46,835 (50.2) | 458,700 (54.7) | < 0.001 |
Household income level | < 0.001 | ||
Q1 (lowest) | 11,785 (12.6) | 135,303 (16.1) | |
Q2 | 11,193 (12.0) | 135,998 (16.2) | |
Q3 | 15,398 (16.5) | 166,604 (19.9) | |
Q4 (highest) | 29,996 (32.2) | 230,726 (27.5) | |
Medical aid program | 4434 (4.8) | 42,002 (5.0) | |
Unknown | 20,487 (22.0) | 127,848 (15.2) | |
Residence | < 0.001 | ||
Urban area | 37,425 (40.1) | 299,712 (35.7) | |
Rural area | 55,868 (59.9) | 538,769 (64.3) | |
Underlying disability | < 0.001 | ||
Mild to moderate | 10,143 (10.9) | 62,919 (7.5) | |
Severe | 4391 (4.7) | 24,075 (2.9) | |
CCI, point | 0.9 (1.5) | 0.6 (1.1) | < 0.001 |
Postoperative ICU admission | 3298 (3.5) | 4347 (0.5) | < 0.001 |
Stay in ward, day | 11.8 (8.4) | 12.6 (11.6) | < 0.001 |
LOS, day | 11.9 (8.6) | 12.7 (11.6) | < 0.001 |
Total cost for hospitalization, USD | 6821.2 (5,524.8) | 3906.7 (4,014.1) | < 0.001 |
Regional anesthesia | 27,807 (29.8) | 339,050 (40.4) | < 0.001 |
Hospital level | < 0.001 | ||
Level A | 18,444 (19.8) | 0 (0.0) | |
Level B | 0 (0.0) | 466,065 (55.6) | |
Level C | 61,272 (65.7) | 59,312 (7.1) | |
Level D | 13,577 (14.6) | 313,104 (37.3) | |
Type of arthroplasty | < 0.001 | ||
TKA | 27,218 (29.2) | 199,542 (23.8) | |
THA | 20,971 (22.5) | 37,395 (4.5) | |
Fracture | 43,916 (47.1) | 599,430 (71.5) | |
Other arthroplasty | 1188 (1.3) | 2114 (0.3) | |
Year of surgery | 0.256 | ||
2019 | 30,244 (32.4) | 274,059 (32.7) | |
2020 | 30,316 (32.5) | 271,509 (32.4) | |
2021 | 32,733 (35.1) | 292,913 (34.9) | |