Development and initial validation of a traditional Chinese medicine symptom-specific outcome measure: a Zheng-related atopic dermatitis symptom questionnaire (ZRADSQ)

Table 2 Results of the item-total correlation analysis in the item reduction phase (N = 40)

Item	Scale mean if item deleted	Scale variance if item deleted	Corrected item-total correlation	Cronbach’s alpha if item deleted
Q1 Itching	15.48	77.18	0.48	0.88
Q2 Itching accompanied by pain	16.60	74.35	0.60	0.87
Q3 Pain	17.03	74.74	0.54	0.88
Q4 Itching aggravated at night	15.68	73.82	0.51	0.88
Q5 Dry skin	15.45	75.90	0.57	0.87
Q6 Night sweats	17.10	80.66	0.20*	0.89
Q7 Burning skin	16.75	72.30	0.55	0.88
Q8 Fatigue	16.80	73.20	0.56	0.87
Q9 Fidgeting	16.63	69.68	0.72	0.87
Q10 Irascibility	16.75	69.73	0.67	0.87
Q11 Insomnia	17.00	73.13	0.58	0.87
Q12 Mouth dryness	16.88	5.80	0.58	0.87
Q13 Thirst	16.95	74.77	0.62	0.87
Q14 Dark urine	16.98	74.38	0.58	0.87
Q15 Constipation	17.15	78.18	0.39	0.88

ISSN: 1477-7525