ADST*
|
Irregular bedtime frequency+
|
Total
|
---|
|
Low
|
Intermediate
|
High
| |
---|
<7 h/day
|
14 (8.8)
|
26 (16.3)
|
35 (21.9)
|
75 (46.9)
|
7–8 h/day
|
17 (10.6)
|
24 (15.0)
|
10 (6.3)
|
51 (31.9)
|
>8 h/day
|
12 (7.5)
|
12 (7.5)
|
10 (6.3)
|
34 (21.3)
|
Total
|
43 (26.9)
|
62 (38.8)
|
55 (34.4)
|
160 (100)
|
- ADST, average daily sleep time
-
+ An irregular bedtime event was defined as a shift from the usual bedtime of >1 h. This occurred <1 night/week for the low-frequency group, 1–3 nights/week for the intermediate-frequency group, and >3 nights/week for the high-frequency group.
- *Chi-Square analysis indicated that average daily sleep time differed significantly across the irregular bedtime frequency groups (χ2 = 11.68, p = 0.022); as supported by a significant Spearman correlation (r = -0.22, p = 0.05).