Table 2.
Recurrence rates of study patients after follow-up periods of 25, 50, 75 and 100 months stratified in low, intermediate and high risk patients.
| WL arm [%] | PDD arm [%] | p value (log-rank test) | |
|---|---|---|---|
| Study patients (WL n = 103, PDD n = 88) | p < 0.001 | ||
| recurrence rate after 25 months | 32 | 9 | |
| recurrence rate after 50 months | 39 | 17 | |
| recurrence rate after 75 months | 48 | 22 | |
| recurrence rate after 100 months | 57 | 28 | |
| High risk group (WL n = 18, PDD n = 17) | p = 0.02 | ||
| recurrence rate after 25 months | 48 | 18 | |
| recurrence rate after 50 months | 61 | 31 | |
| recurrence rate after 75 months | 79 | 39 | |
| recurrence rate after 100 months | 85 | 56 | |
| Inter risk group (WL n = 35, PDD n = 40) | p = 0.02 | ||
| recurrence rate after 25 months | 40 | 14 | |
| recurrence rate after 50 months | 49 | 20 | |
| recurrence rate after 75 months | 58 | 30 | |
| recurrence rate after 100 months | 60 | 33 | |
| Low risk group (WL n = 50, PDD n = 31) | p = 0.003 | ||
| recurrence rate after 25 months | 16 | 2 | |
| recurrence rate after 50 months | 28 | 5 | |
| recurrence rate after 75 months | 45 | 13 | |
| recurrence rate after 100 months | 48 | 19 |
Abbreviations: PDD, photodynamic diagnosis; WL, white light cystoscopy.