From: Reliability and validity of the Shoulder Pain and Disability Index in a sample of patients with frozen shoulder
Scale
Test–retest reliability
Measurement error
ICC2,1 (95% CI)
SEM
MDC
Pain
subscale
0.989 (0.975–0.995)
2.27
6.27
Disability subscale
0.990 (0.988–0.998)
2.32
6.25