Validity, Reliability, and Responsiveness of the Brief Pain Inventory in Inflammatory Bowel Disease
Table 6
BPI sensitivity to change among patients reporting improved or worse symptoms from baseline.
Ulcerative colitis
Crohn’s disease
Improved
Worse
Improved
Worse
T1 ()
T2 ()
Cohen’s
T1 ()
T2 ()
Cohen’s
T1 ()
T2 ()
Cohen’s
T1 ()
T2 ()
Cohen’s
BPI intensity
10.0 (7.7)
9.2 (6.5)
0.11
9.4 (10.4)
10.4 (8.6)
12.9 (6.5)
8.8 (6.3)
0.64
10.5 (5.9)
14.5 (5.7)
BPI interference
18.5 (20.2)
13.6 (16.6)
0.26
16.0 (16.6)
16.4 (18.5)
27.9 (20.5)
15.8 (17.1)
0.64
17.5 (16.5)
22.3 (19.9)
BPI: brief pain inventory, T1: baseline, T2: retest (4–6 weeks after baseline). Figures in mean and standard deviation. Cohen’s effect size: 0.2 small, 0.5 moderate, and 0.8 large.
