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Table 2 Internal consistency of QoL-PCD scales measured by Cronbach’s α and test–retest reliability measured by ICC

From: Health related quality of life in adult primary Ciliary dyskinesia patients in Cyprus: development and validation of the Greek version of the QOL-PCD questionnaire

Scale# ItemsScale Median(IQR)Cronbach’s αICC (95%)
Physical Functioning580.0 (46.7–93.3)0.8800.910 (0.803–0.959)
Vitality366.7 (44.4–77.8)0.4630.817 (0.598–0.916)
Emotional Functioning586.7 (63.7–93.3)0.6420.893 (0.766–0.951)
Treatment Burden466.7 (41.7–83.3)0.8090.670 (0.167–0.869)
Social Functioning333.3 (0.0–66.7)0.6810.768 (0.491–0.894)
Role466.7 (58.3–83.3)0.5420.902 (0.785–0.955)
Health Perspective450.0 (41.7–66.7)0.6390.670 (0.277–0.850)
Upper Respiratory Symptoms458.3 (41.7–83.3)0.6870.853 (0.678–0.933)
Lower Respiratory Symptoms661.1 (44.4–72.2)0.7840.895 (0.769–0.952)
Hearing Symptoms266.7 (58.3–100)0.6610.838 (0.645–0.926)