Table 7.

Description of Reliability Figures Regarding the Light and Color Questionnaire (LCQ) With Reference to Patients/Family Members (LCQ-P/F) and Staff (LCQ-S).

Questionnaire Details	Cronbach’s Coefficient α	Corrected Item-Total Correlation (Range)	Cronbach’s α If Item Deleted (Range)
Patient/family
Items 1, 2, 3, 5, 6 (light)	.90	.72–.81	.87–.89
Items 4, 7–11 (color)	.93	.66–.86	.91–.93
All Items 1–11	.94	.67–.83	.93–.94
Staff
Items 1–6 (light)	.92	.70–.82	.89–.91
Items 7–11 (color)	.94	.74–.91	.92–.95
All Items 1–11	.93	.70–.82	.89–.91