Table 1.

Baseline characteristics.

Total	n = 19	100%
Age, median (range), years	80	(72–91)
Gender
Male	13	68
Female	6	32
Charlson Comorbidity Index
2	3	16
3	3	16
≥4	13	68
Clinical T stage
cT1	2	11
cT2	6	32
cT3	11	58
Clinical N stage
cN0	13	68
cN1	5	26
cN2	1	5
Distance from anal verge
0–5 cm	9	47
5–10 cm	9	47
10–15 cm	1	5
Differentiation
Well	12	63
Moderate	1	5
Poor	0	0
Not known	6	32
Treatment prior to CXB
Chemoradiotherapy 1	6	32
5 × 5 Gy	6	32
13 × 3 Gy	2	11
Local excision 2	4	21
HDR 3	1	5
Tumor size prior to CXB
≤3 cm	16	84
>3 cm	3	16
Treatment intent
Clinical complete response	8	42
Local control of the residual tumor	11	58
Dose of CXB
90 Gy	17	89
60 Gy	2	11
Follow-up, median (range), months	13	(6–32)

Abbreviations: CXB, contact X-ray brachytherapy; HDR, high-dose-rate brachytherapy. ¹ One patient received chemotherapy followed by chemoradiotherapy. ² One patient received a dose of 60 Gy with CXB followed by chemoradiotherapy. ³ This patient received a dose of 60 Gy with CXB.