Table 3.

Follow-up, local treatment failure and 5-year Kaplan–Meier estimates based on the method of distance between tumour margin and tantalum ring (DTR) measurement

Feature	Group 1	Group 2	p-valuea	Total
	[n = 22 patients]	[n = 32 patients]		[n = 54 patients]
Mean follow-up, months [median, range]	80 [86, 6–134]	50 [49, 12–123]	0.002	62 [60, 6–134]
Local treatment failure (%)	4 (18)	0 (0)	0.02b	4 (7)
Interval to local treatment failure, months [median, range]	12 [10, 5–23]	na	na	12 [10, 5–23]
5-year KM estimate for:
Local treatment success	0.82	1	0.02c	0.92
Overall survival	0.85	0.83	0.8c	0.84

na not applicable, KM Kaplan–Meier, DTR distance between tumour margin and tantalum ring

^aIndependent t-test

^bFisher exact test

^cLog-rank test