Comparison of Different Disease-Specific Health-Related Quality of Life Measurements in Patients with Long-Term Noninvasive Ventilation

Table 2

Correlations between HRQL questionnaires.

	SGRQ
	Symptoms	Activities	Impacts	Total
SRI
Respiratory complaints
Physical functioning
Attendant symptoms and sleep	—
Social relationships
Anxiety
Psychological well-being
Social functioning
Summary score
MRF-26
Daily activities	0.50	0.82	0.73	0.80
Perceived disability	0.46	0.48	0.69	0.69
Total	0.51	0.73	0.78	0.81

Missing values (—) indicate no significant relationships (). High correlations (correlation coefficient > 0.70), excluding summary and total scores, are in bold; HRQL = health-related quality of life; SRI = Severe Respiratory Insufficiency; MRF = Maugeri Respiratory Failure; SGRQ = St. George’s Respiratory Questionnaire.