Table 2 The stratified analyses of ASA, CCI, age, and survival patient number of two groups
Variable | Treatment regime groups | χ2 | P | |
|---|---|---|---|---|
Nonoperative group n(%) | Arthroplasty group n(%) | |||
ASA | ||||
 1or2 | 27 (60.0) | 18 (40.0) | 0.056 | 0.813 |
 3or4 | 26 (63.4) | 15 (36.6) | ||
CCI | ||||
 0or1 | 18 (50.0) | 18 (50.0) | 4.508 | 0.105 |
 2 | 11 (61.1) | 7 (38.9) | ||
  ≥ 3 | 24 (75.0) | 8 (25.0) | ||
Age-stratified | ||||
 90—94 years | 41 (62.1) | 25 (37.9) | 0.029 | 0.864 |
  ≥ 95 years | 12 (60.0) | 8 (40.0) | ||
Long-term survival probability | ||||
 Survival > 5 years | 6 (31.6) | 13 (68.4) | 9.31201 | 0.002* |
 Survival< 5 years | 47 (70.1) | 20 (29.9) | ||