Linguistic Validation of the LupusQoL for the Assessment of Quality of Life in Iranian Patients with Systemic Lupus Erythematosus

Table 2

Cronbach’s alpha for the total scale and its subscales’ and item analysis.

	Subscale Alpha and if item deleted	Total Alpha if item deleted	Corrected item-subscale correlation	Corrected item-total and subscale-total correlations
Physical health	0.93			0.83
Items 1–8	0.91–0.93	0.97	0.60–0.87	0.62–0.87
Pain	0.85			0.81
Items 9–11	0.72–0.85	0.97	0.67–0.80	0.39–0.88
Planning	0.89			0.84
Items 12–14	0.82–0.87	0.97	0.77–0.82	0.78–0.89
Intimate relationship	0.92			0.64
Items 15 and 16	—	0.97	0.86	0.78 and 0.64
Burden to others	0.93			0.74
Items 17–19	0.86–0.90	0.97	0.80–0.91	0.79–0.88
Emotional health	0.93			0.75
Items 20–25	0.91–0.93	0.97	0.72–0.89	0.61–0.84
Body image	0.84			0.73
Item 26–30	0.80–0.83	0.97	0.60–0.69	0.48–0.83
Fatigue	0.82			0.86
Item 31–34	0.74–0.82	0.97	0.50–0.73	0.39–0.89