Table 4.

Regret scores in the decision aid group and the usual care group (scores and analyses unadjusted)

Regret scales	Decision aid Mean (SD)	Usual care Mean (SD)	P
Process regret1
t2 (N = 219)	1.85 (0.50)	1.83 (0.54)	0.78
Option regret1
t3 (N = 210)	1.49 (0.55)	1.53 (0.54)	0.59
t4 (N = 201)	1.58 (0.65)	1.68 (0.62)	0.30
Outcome regret1
t3 (N = 209)	2.06 (0.82)	2.22 (0.86)	0.19
t4 (N = 201)	2.16 (0.86)	2.29 (0.91)	0.32
Brehaut regret2
t3 (N = 212)	14.2 (14.9)	15.7 (15.3)	0.52
t4 (N = 201)	16.1 (16.2)	19.4 (16.6)	0.19

t2 = 2 weeks after the decision was made, before treatment started.

t3 = 6 months after treatment.

t4 = 12 months after treatment.

¹Regret scales run from 1 (=no regret) to 5 (=strong regret).

²Brehaut regret scale runs from 0 to 100 with higher scores reflecting more regret.