Table 2.
Recurrence and Survival Patterns by Operation Performed.
| Segmentectomy (n = 384) | Lobectomy (n = 748) | p-value | |
|---|---|---|---|
| Recurrences | |||
| Overall (n) | 78 (20.3%) | 142 (19.0%) | 0.63 |
| Locoregional (n) | 22 (5.7%) | 43 (5.7%) | 0.89 |
| Distant (n) | 56 (14.6%) | 99 (13.2%) | 0.52 |
| Freedom from Recurrence (5 yr) | 69.4% | 70.2% | 0.85 |
| 95% Confidence Interval | (63.4%,76.1%) | (65.9%,74.8%) | |
| Overall Survival (5 yr) | 49.9% | 59.4% | 0.02 |
| 95% Confidence Interval | (43.7%,57.1%) | (55.1%,63.9%) | |
| Median Follow-Up (months) | 34.2 | 38.8 | < 0.01 |
Median follow-up for recurrences is 36.8 months. Estimates and confidence intervals for five-year overall survival and freedom from recurrence are calculated from Kaplan-Meier survival function estimates. P-value for comparing these estimates between segmentectomy and lobectomy are calculated from a χ2 test based on the complementary log-log transformed survival estimates.