Table 4

Percent of patients who did not receive hormone therapy with at least 12 months follow-up achieving specified PSA nadir threshold over time.

Percent (Number) of patients achieving specified PSA nadir

35 Gy

6 months

(40 patients)

12 months

(38 patients)

18 months

(28 patients)

24 months

(43 patients)

30 months

(32 patients)

< 1 ng/mL

48% (19)

55% (21)

57% (16)

88% (38)

88% (28)

< .5 ng/mL

15% (6)

37% (14)

46% (13)

65% (28)

75% (24)

36.25 Gy

6 months

(148 patients)

12 months

(133 patients)

18 months

(43 patients)

24 months

(21 patients)

< 1 ng/mL

35% (53)

45% (60)

76% (33)

81% (17)

< .5 ng/mL

19% (29)

26% (34)

51% (22)

66% (14)

A chi-square test of independence was performed between the 35 Gy and 36.25 Gy. For both the < 1 ng/ml (χ2 = 5.794, p = .122) and < .5 ng/ml (χ2 = 2.259, p = .520) cases the chi-square test shows no significant difference is present between 35 Gy and 36.25 Gy.

Katz et al. BMC Urology 2010 10:1   doi:10.1186/1471-2490-10-1