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. 2021 Feb 9;91:166–174. doi: 10.1016/j.sleep.2021.02.003

Table 2.

Changes in bedtime before and during lockdown.

[<20] [20-21] [21-22] [22-23] [23-24] [>24] Chi square p
Weekdays
1–3 years
 before 24 (1.91%) 311 (24.72%) 649 (51.59%) 227 (18.04%) 44 (3.50%) 3 (0.24%) 226.45 <0.0001
 during 8 (0.64%) 141 (11.24%) 510 (40.67%) 407 (32.46%) 156 (12.44%) 32 (2.55%)
4–5 years
 before 5 (0.56%) 241 (27.05%) 513 (57.58%) 120 (13.47%) 11 (1.23%) 1 (0.11%) 384 <0.0001
 during 1 (0.11%) 68 (7.63%) 318 (35.69%) 332 (37.26%) 136 (15.26%) 36 (4.04%)
6–12 years
 before 10 (0.54%) 465 (25.27%) 1146 (62.28%) 203 (11.03%) 16 (0.87%) 0 (0.00%) 1352.62 <0.0001
 during 1 (0.05%) 61 (3.32%) 506 (27.56%) 746 (40.63%) 424 (23.09%) 98 (5.34%)
13–18 years
 before 0 (0.00%) 10 (3.24%) 123 (39.81%) 138 (44.66%) 33 (10.68%) 5 (1.62%) 190 <0.0001
 during
0 (0.00%)
2 (0.66%)
27 (8.88%)
82 (26.97%)
118 (38.82%)
75 (24.67%)


Weekend
1–3 years
 before 5 (0.40%) 120 (9.63%) 439 (35.23%) 480 (38.52%) 178 (14.29%) 24 (1.93%) 145.89 <0.0001
 during 1 (0.08%) 60 (4.82%) 308 (24.74%) 445 (35.74%) 314 (25.22%) 117 (9.40%)
4–5 years
 before 4 (0.45%) 81 (9.17%) 288 (32.62%) 335 (37.94%) 149 (16.87%) 26 (2.94%) 98.04 <0.0001
 during 2 (0.23%) 39 (4.41%) 183 (20.68%) 335 (37.85%) 226 (25.54%) 100 (11.30%)
6–12 years
 before 9 (0.49%) 147 (8.06%) 617 (33.83%) 737 (40.41%) 264 (14.47%) 50 (2.74%) 190.67 <0.0001
 during 5 (0.27%) 75 (4.11%) 413 (22.64%) 685 (37.55%) 484 (26.54%) 162 (8.88%)
13–18 years
 before 3 (0.97%) 22 (7.12%) 96 (31.07%) 117 (37.86%) 54 (17.48%) 17 (5.50%) 39.88 <0.0001
 during 2 (0.65%) 14 (4.58%) 52 (16.99%) 100 (32.68%) 91 (29.74%) 47 (15.36%)