Longitudinal quality of life analysis in a phenylketonuria cohort provided sapropterin dihydrochloride

Table 5 Cronbach Alpha analysis of PKU QOL questionnaire

	No. of questions	Overall alpha	Alpha for adults	Alpha for pediatrics	Alpha for males	Alpha for females
Impact	18	0.87	0.84	0.89	0.89	0.85
Worries	10	0.91	0.86	0.94	0.93	0.86
Satisfaction	8	0.88	0.87	0.89	0.90	0.86
Support	4	0.88	0.91	0.90	0.92	0.87
General well-being	11	0.90	0.90	0.93	0.91	0.92
Total questionnaire	51	0.95	0.94	0.96	0.96	0.94

ISSN: 1477-7525