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Table 1 Descriptive statistics of sample demographic characteristics

From: The effect of COVID-19 school closures on adolescent sleep duration: an uncontrolled before-after study

 

Boys (n = 1698)

Girls (n = 1567)

Total (n = 3265)

Age (years)

14.56(2.01)

14.56(1.97)

14.56(1.99)

Grade

 6th

309(18.20)

268(17.10) *

577(17.67)

 7th

256(15.08)

263(16.78)

519(15.90)

 8th

256(15.08)

210(13.40)

466(14.27)

 9th

170(10.01)

189(12.06)

359(11.00)

 10th

350(20.61)

311(19.85)

661(20.25)

 11th

306(18.02)

256(16.34)

562(17.21)

 12th

51(3.00)

70(4.47)

121(3.71)

Family structure

 Nuclear family

1498(88.22)

1381(88.13)

2879(88.18)

 Other types

200(11.78)

186(11.87)

386(11.82)

Parental education

 High school or below

390(24.12)

318(20.87) *

708(22.54)

 College or above

1227(75.88)

1206(79.13)

2433(77.46)

Only Child

 Yes

1226(72.20)

1152(73.52)

2378(72.83)

 No

472(27.80)

415(26.48)

887(27.17)

Adolescents severely affected by COVID-19

 Yes

24(1.41)

14(0.89)

38(1.16)

 No

1674(98.59)

1553(99.11)

3227(98.84)

Grade concerned

 Concerned

688(43.57)

677(45.77)

1365(44.64)

 Not concerned

891(56.43)

802(54.23)

1693(55.36)

  1. Note: Data are n (%) or mean (SD). *P < 0.05 for the sex differences