Table 2.

In-Field Failures by Dose*

Dose group	≤ 20 Gy	21-25 Gy	26-30 Gy	31-35 Gy	36-40 Gy
Total sites, n	77	17	81	35	4
Sites failed, n (%)	5 (6%)	0 (0%)	4 (5%)	1 (3%)	0 (0%)
Subgroups
< 10 cm
Total sites, n	67	15	74	31	3
Sites failed, n (%)	3 (4%)	0 (0%)	2 (3%)	1 (3%)	0 (0%)
≥ 10 cm
Total sites, n	10	2	7	4	1
Sites failed, n (%)	2 (20%)	0 (0%)	2 (29%)	0 (0%)	0 (0%)

*Crude rates of failure.