TABLE 1.
Concordance rate between self-assessment categories and MSFsc quartiles distribution in local time (24 h scale).
| MSFsc quartiles distribution | ||||||
| Self-assessment | N | 2.07–3.72 | 3.73–4.55 | 4.56–5.26 | 5.27–8.75 | Concordance rate (%) |
| “Definitely a morning-type” | 5 | 5 | 0 | 0 | 0 | 100 |
| “Rather more a morning-type than an evening-type” | 36 | 9 | 13 | 10 | 4 | 36 |
| “Rather more an evening-type than a morning-type” | 18 | 1 | 3 | 6 | 8 | 33 |
| “Definitely an evening-type” | 3 | 0 | 0 | 0 | 3 | 100 |
Weighted kappa coefficient (kw = 0.386, 95% CI: 0.239–0.533; p < 0.001).