Table 6.

Responsiveness statistics for the IBD-Control summary scores in subjects who improved or deteriorated. Data for stable patients (no change) are included for reference

Criteria for change in state	n	Mean difference (SD)	Effect size*	Standardised response mean†	Modified standardised response mean‡
(A) IBD-Control-8 sub-score
UK-IBD-QoL
Improved by >10 points	19	+5.50 (4.69)	1.44	1.17	2.72
No change (±10 points)	63	+0.13 (2.02)	0.02	0.06	0.06
Deteriorated by >10 points	26	−4.92 (3.88)	0.99	1.27	2.44
Physician global assessment
Improved by ≥1 point	27	+4.52 (5.56)	1.08	0.81	1.22
No change	32	0.00 (3.72)	0.00	0.00	0.00
Deteriorated by ≥1 point	27	−3.32 (4.81)	0.76	0.69	0.89
(B) IBD-Control-VAS
UK-IBD-QoL
Improved by >10 points	19	+28.21 (31.33)	1.09	0.90	1.84
No change (±10 points)	63	+0.84 (15.34)	0.03	0.05	0.05
Deteriorated by >10 points	26	−26.85 (28.20)	0.90	0.95	1.75
Physician global assessment
Improved by ≥1 point	27	+29.55 (31.78)	1.14	0.93	1.28
No change	32	−0.56 (23.00)	0.02	0.02	0.02
Deteriorated by ≥1 point	27	−19.71 (30.53)	0.76	0.65	0.86

*Effect size (ES)=Mean difference divided by the SD of the baseline absolute scores for the group.

†Standardised response mean (SRM)=Mean difference divided by SD of the difference for the group.

‡Modified SRM (MSRM)=Mean difference for the group divided by SD of the difference for unchanged patients.

IBD, inflammatory bowel disease; QoL, quality of life.