DLQI scores in vitiligo: reliability and validity of the Persian version

Table 1 Item scaling tests: convergent validity for DLQI scales

Scale	No. of items per scale	Convergent validity (range of correlation)	Scaling Success¹	Scaling Success Rate²	Internal consistency (Cronbach's α)
SF	2	0.69–0.78	2/2	100	0.70
DA	2	0.71–0.78	2/2	100	0.76
L	2	0.67–0.88	2/2	100	0.71
WS	1	1.00	1/1	100	1.00
PR	2	0.50–0.99	2/2	100	0.79
T	1	1.00	1/1	100	1.00

SF (Symptoms and feelings), DA (Daily activities), L (Leisure), WS (Work and School),PR (Personal relationships), T (Treatment) 1- Number of correlation between items and hypothesized scale corrected for overlap ≥ 0.4/ total number of convergent validity tests. 2- Scaling success rate is the previous column as a percentage.