Table 5

Differences between tumours with and without local recurrence after TCT. (Values are mean (SD))

ParameterNo recurrenceRecurrencep Value
Tested with Wilcoxon signed rank test. *Values for tumours >2 mm tumour height.
Number of treated tumours (n)34 (62%)21 (38%)
Number of tumours per eye before TCT (n)4.0 (1.6)3.8 (1.8)0.63
Age at start of treatment (years)0.78 (0.6)0.69 (0.62)0.8
Tumour diameter (mm)5.4 (3.0)7.9 (4.7)<0.0001
Tumour height (mm)2.9 (1.8)4.5 (2.5)<0.0001
Distance to optic disc (mm)2.75 (2.73)2.14 (2.27)0.19
Number of TCT sessions (n)4.2 (1.6)4.4 (1.6)0.76
Total duration of TCT (minutes)54.1 (29.7)63.8 (32.5)0.07
Mean power during TCT session (mW)493 (212)613 (190)<0.0001
Mean total energy applied during TCT (J)1677 (1086)2340 (1250) (2601 ± 1207)*0.001 (0.02)*
Mean energy/tumour volume applied during TCT (J/mm3)183 (220)497 (1077) (48 ± 65)*<0.0001 (<0.0001)*