Table 4 Internal consistency and reliability of the ISI scale (n = 120)
From: The Moroccan dialect version of the Insomnia Severity Index
Cronbach’s alpha for total scale with item removed | Reliability ICC (95% CI) | |
|---|---|---|
Item 1 | 0.80 | 0.90 (0.85–0.93) |
Item 2 | 0.81 | 0.86 (0.81–0.91) |
Item 3 | 0.84 | 0.92 (0.89–0.95) |
Item 4 | 0.75 | 0.92 (0.88–0.94) |
Item 5 | 0.77 | 0.93 (0.90–0.95) |
Item 6 | 0.75 | 0.93 (0.90–0.95) |
Item 7 | 0.77 | 0.90 (0.86–0.93) |
Total score | 0.81 | 0.99 (0.99–1.00) |