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Table 4 Internal consistency, reliability and construct validity of SProND categories

From: Quality of life and symptom burden in children with neurodegenerative diseases: using PedsQL and SProND, a new symptom-based scale

Symptom scale No of items Cronbach's
alpha
Intraclass
correlation
95% C.I p-value
Neurobehavioural 2 0.60 0.60 0.12–0.66 0.004
Movements and mobility related 3 0.87 0.87 0.77–0.93  < 0.001
Breathing and swallowing 3 0.85 0.85 0.73–0.92  < 0.001
Daily activities 6 0.70 0.67 0.48–0.81  < 0.001
Total symptom score 14 0.86 0.85 0.76–0.91  < 0.001