Table 2.

Reliability analysis coefficients of the Jenkins Sleep Scale (JSS) (n = 420)

Variable	Item-rest correlation	Cronbach’s α	McDonald’s ω	Intraclass correlation ICC
Total JSS	NA	0.74	0.75	0.94
If item dropped
JSS-1	0.56	0.67	0.69	NA
JSS-2	0.44	0.73	0.74	NA
JSS-3	0.64	0.63	0.64	NA
JSS-4	0.52	0.70	0.72	NA

Notes: The ICCs were based on a subsample of 147 participants only