Table 2. Comparisons of long-term outcomes before and after propensity score matching.
| Variables | The entire cohort | The PSM cohort | |||||
|---|---|---|---|---|---|---|---|
| Without a FH (N=929) | With a FH (N=183) | P | Without a FH (N=179) | With a FH (N=179) | P | ||
| Period of follow-up*, months | 58.8±40.7 | 62.0±41.5 | 0.250 | 64.5±43.4 | 62.0±41.6 | 0.566 | |
| Recurrence during the follow-up, n (%) | 586 (63.1) | 136 (74.3) | 0.004 | 96 (53.6) | 135 (75.4) | <0.001 | |
| Early recurrence (within 2 years) | 381 (41.0) | 72 (39.3) | 0.742 | 62 (34.6) | 72 (40.2) | 0.326 | |
| Later recurrence (beyond 2 years) | 205 (22.1) | 64 (35.0) | <0.001 | 34 (19.0) | 63 (35.2) | 0.001 | |
| Death during the follow-up, n (%) | 531 (57.2) | 111 (60.7) | 0.413 | 85 (47.5) | 109 (60.9) | 0.015 | |
| OS**, % | 77.0±4.4 | 72.8±8.5 | 0.994 | 109.0±12.0 | 68.8±9.3 | 0.042 | |
| 1-year OS rate | 88.4 | 88.5 | 88.3 | 88.3 | |||
| 3-year OS rate | 67.2 | 70.5 | 72.5 | 69.8 | |||
| 5-year OS rate | 56.5 | 57.1 | 64.5 | 56.1 | |||
| 10-year OS rate | 33.0 | 29.9 | 43.7 | 30.4 | |||
| RFS**, % | 35.5±3.1 | 33.1±2.6 | 0.428 | 57.7±12.0 | 33.1±2.7 | 0.006 | |
| 1-year RFS rate | 70.1 | 74.9 | 71.5 | 74.3 | |||
| 3-year RFS rate | 49.6 | 47.5 | 58.0 | 46.9 | |||
| 5-year RFS rate | 38.7 | 35.4 | 49.6 | 34.5 | |||
| 10-year RFS rate | 19.1 | 13.1 | 26.0 | 12.7 | |||
*, values are mean ± standard deviation; **, values are median ± standard error. FH, family history; OS, overall survival; PSM, propensity score matching; RFS, recurrence-free survival.