Table 3.

C19-YRSm scaling assumptions, targeting and internal reliability

Scaling assumptions (range)	Symptom Severity	Functional Disability
Item means	0.9–2.4	0.7–2.1
Item SD	0.7–1.1	0.9–1.1
Item-total correlation	0.37–0.61	0.46–0.65
Targeting
Missing data (%): range	0.8–2.3	0.8–1.1
Floor effects (%): range	11.0–48.0	6.0–40.0
Ceiling effects (%): range	2.0–50.0	6.0–61.0
Internal reliability
Cronbach’s alpha	0.82	0.81

C19-YRSm, modified COVID-19 Yorkshire Rehabilitation Scale.