Table 2 Recurrence rates with likelihood ratios and cumulative recurrence-free survival (RFS) rates at 2 years follow-up (2YFU), 5 years follow-up (5YFU), and 10 years follow-up (10YFU). Results are depicted for the whole collective and for cases with surgery at own institution (in domo) and surgery elsewhere (ex domo). Statistically significant hydrogen peroxide effects were found for all cases treated in domo and for the whole collective
n | Recurrences (recurrence rate) | Likelihood ratio of recurrence (chi-square test) | 2YFU-RFS (standard error) | 5YFU-RFS (standard error) | 10YFU-RFS (standard error) | Log-rank test for differences in RFS | |
|---|---|---|---|---|---|---|---|
Whole collective | 51 | 21 (0.41) | 0.69 (0.07) | 0.54 (0.08) | 0.54 (0.08) | ||
Surgery in domo | 39 | 11 (0.28) | 11.9 (p = 0.001) | 0.72 (0.08) | 0.68 (0.08) | 0.68 (0.08) | p = 0.001 |
Surgery ex domo | 12 | 10 (0.83) | 0.42 (0.14) | 0.17 (0.11) | 0.17 (0.11) | ||
With H2O2 (in domo) | 24 | 4 (0.17) | 4.1 (p = 0.04) | 0.86 (0.07) | 0.79 (0.10) | 0.79 (0.10) | p = 0.02 |
Without H2O2 (in domo) | 15 | 7 (0.47) | 0.48 (0.14) | 0.48 (0.14) | 0.48 (0.14) | ||
With H2O2 (whole collective) | 27 | 6 (0.22) | 8.8 (p = 0.004) | 0.80 (0.08) | 0.74 (0.09) | 0.74 (0.09) | p = 0.002 |
Without H2O2 (whole collective) | 24 | 15 (0.63) | 0.47 (0.11) | 0.31 (0.10) | 0.31 (0.10) |