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Comparison of survival time between the two groups [cases (%)].
| Group | Follow-up of 1 year | Follow-up of 2 years | Follow-up of 3 years | |||
|---|---|---|---|---|---|---|
| Survival | Death | Survival | Death | Survival | Death | |
| Observation group (n = 42) | 41 (97.62) | 1 (2.38) | 37 (88.10) | 5 (11.90) | 34 (80.95) | 8 (19.05) |
| Control group (n = 42) | 30 (71.43) | 12 (28.57) | 24 (57.14) | 18 (42.86) | 20 (47.62) | 22 (52.38) |
| Log-rank χ2 | 10.860 | 10.830 | 11.370 | |||
| P | 0.001 | 0.001 | 0.001 | |||
