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

Table 3.

Changes in risetime before and during lockdown.

[6-7] [7-8] [8-9] [9-10] [>10] Chi square p
Weekdays
1–3 years
 before 288 (22.97%) 663 52.87%) 243 (19.38%) 50 (3.99%) 10 (0.80%) 263.93 <0.0001
 during 159 (12.82%) 404 (32.58%) 438 (35.32%) 182 (14.68%) 57 (4.60%)
4–5 years
 before 179 (20.18%) 576 (64.94%) 121 (13.64%) 9 (1.01%) 2 (0.23%) 595.29 <0.0001
 during 36 (4.10%) 226 (25.74%) 345 (39.29%) 195 (22.21%) 76 (8.66%)
6–12 years
 before 628 (34.17%) 1121 (60.99%) 68 (3.70%) 17 (0.92%) 4 (0.22%) 1976.07 <0.0001
 during 36 (1.97%) 422 (23.03%) 785 (42.85%) 445 (24.29%) 144 (7.86%)
13–18 years
 before 174 (56.31%) 118 (38.19%) 13 (4.21%) 2 (0.65% 2 (0.65%) 300.2263 <0.0001
 during
8 (2.64%)
102 (33.66%)
135 (44.55%)
38 (12.54%)
20 (6.60%)


Weekend
1–3 years
 before 88 (7.06%) 334 (26.81%) 476 (38.20%) 257 (20.63%) 91 (7.30%) 302.01 <0.0001
 During 144 (11.46%) 385 (30.65%) 135 (10.75%) 524 (41.72%) 68 (5.41%)
4–5 years
 before 54 (6.14%) 228 (25.91%) 342 (38.86%) 186 (21.14%) 70 (7.95%) 267.13 <0.0001
 during 39 (4.38%) 195 (21.89%) 96 (10.77%) 466 (52.30%) 95 (10.66%)
6–12 years
 before 113 (6.19%) 488 (26.71%) 682 (37.33%) 412 (22.55%) 132 (7.22%) 873.16 <0.0001
 during 30 (1.63%) 200 (10.90%) 172 (9.37%) 1097 (59.78%) 336 (18.31%)
13–18 years
 before 20 (6.51%) 73 (23.78%) 106 (34.53%) 76 (24.76%) 32 (10.42%) 227.01 <0.0001
 during 2 (0.65%) 11 (3.57%) 12 (3.90%) 134 (43.51%) 149 (48.38%)