Minimal Important Difference (MID) of the Dermatology Life Quality Index (DLQI): Results from patients with chronic idiopathic urticaria

Table 1 Distributional Characteristics of Total DLQI Score at Baseline for Studies A and B

Item	N	Floor (%)	Ceiling (%)	Mean	SD	Cronbach's Alpha	SEM
Study A
Symptoms/Feelings	403	0.25	11.66	3.49	1.49	.	.
Daily Activities	403	24.07	3.72	1.92	1.69	.	.
Leisure	403	37.72	3.72	1.46	1.64	.	.
Work and School	403	27.05	15.14	1.21	1.01	.	.
Personal Relationships	403	53.85	2.73	1.04	1.53	.	.
Treatment	403	63.03	3.23	0.52	0.79	.	.
Total DLQI	403	2.98	0.25	9.64	6.19	0.87	2.24
Study B
Symptoms/Feelings	423	0.24	9.69	3.48	1.39	.	.
Daily Activities	423	23.88	2.84	1.84	1.60	.	.
Leisure	423	37.35	4.02	1.38	1.56	.	.
Work and School	423	30.97	16.08	1.15	1.04	.	.
Personal Relationships	423	53.19	2.36	0.96	1.39	.	.
Treatment	423	62.65	2.84	0.51	0.76	.	.
Total DLQI at Baseline	423	0.24	0.47	9.32	5.61	0.84	2.24

Floor = percent who answered minimum value. Ceiling = percent who answered maximum value.

ISSN: 1477-7525