Treatment and prognosis of patients with late rectal bleeding after intensity-modulated radiation therapy for prostate cancer

Table 2 Log-rank test for factors associated with improvement after observation.

Factors	Groups (number of patients)	Response rate at 1 year (%)	P value
Age	≥ 71 (25)/≤ 70 (20)	54/35	0.12
IMRT method	Linac (30)/Tomotherapy (15)	20/100	0.009
Use of ADT	Yes (35)/No (10)	44/17	0.56
Use of antithrombotics	Yes (26)/No (14)	61/49	0.66
Presence of DM	Yes (6)/No (38)	67/42	0.37
Rectal %V40Gy	≥ 35.0% (27)/< 35.0% (17)	50/35	0.80
Rectal %V70Gy	≥ 8.1% (25)/< 8.1% (19)	33/65	0.005

ADT, androgen deprivation therapy; DM, diabetes mellitus. Rectal %V40/%70 Gy, % of rectum volume receiving ≥ 40 or 70 Gy.

ISSN: 1748-717X