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Table 1 Sleep duration and Total time in bed of grade 5 children by gender, highest level of parental education, school region, household income, weight status, total daily exposure to devices and days of the week, Alberta, 2012

From: The use of entertainment and communication technologies before sleep could affect sleep and weight status: a population-based study among children

Variables Frequency (%) Sleep duration (Hours) p-value Total Time in Bed (Hours) p-value
Gender
 Girls 1235 (53.2) 9.85 (±0.56) 0.05 10.22 (±0.56) 0.01
 Boys 1071 (46.8) 9.82 (±0.58)   10.16 (±0.59)  
Highest level of parental education
 No school/Elementary school 63 (3.0) 9.83 (±0.58) 0.65 10.19 (±0.58) 0.29
 Secondary/college 1391 (59.0) 9.86 (±0.54)   10.21 (±0.54)  
 University 792 (38.0) 9.83 (±0.58)   10.17 (±0.59)  
Region of elementary school
 Metropolitan 612 (49.0) 9.78 (±0.59) <0.001 10.11 (±0.60) <0.001
 City 781 (16.3) 9.90 (±0.57)   10.21 (±0.54)  
 Rural/town 941 (34.7) 9.88 (±0.54)   10.24 (±0.58)  
Household income
 < $50,000 (Low) 385 (19.7) 9.71 (±0.58) <0.001 10.08 (±0.57) <0.001
 $50,001 - $100,000 (Middle) 614 (26.6) 9.84 (±0.55)   10.21 (±0.55)  
 > $100,000 (High) 684 (28.2) 9.90 (±0.55)   10.22 (±0.56)  
 Don’t know/Prefer not to answer* 575 (25.5) 9.91 (±0.57)   10.22 (±0.59)  
Weight category
 Thinness grade 3 20 (0.9) 10.06 (±0.63) ** < 0.001 10.38 (±0.63) <0.001
 Thinness grade 2 49 (2.1) 9.91 (±0.71)   10.27 (±0.71)  
 Thinness grade 1 233 (10.1) 9.98 (±0.51)   10.30 (±0.51)  
 Normal 1503 (65.0) 9.88 (±0.57)   10.21 (±0.61)  
 Overweight 399 (17.3) 9.75 (±0.60)   10.08 (±0.57)  
 Obese 48 (2.1) 9.69 (±0.57)   10.01 (±0.01)  
 Morbid Obese 3 (0.1) 9.80 (±0.14)   10.20 (±0.59)  
Total daily exposure to devices (hours)
 < 2 438 (18.8) 9.97(±0.55) <0.001 10.29 (±0.56) <0.001
 2.0 1045 (44.1) 9.89 (±0.52)   10.22 (±0.53)  
 3.5 48 (2.2) 9.71(±0.54)   10.04 (±0.51)  
 4.0 264 (12.1) 9.82 (±0.62)   10.14 (±0.61)  
 5.0 201 (9.5) 9.72 (±0.54)   10.07 (±0.66)  
 5.5 318 (13.3) 9.78 (±0.60)   10.12 (±0.61)  
Days of the week
 Week days 2276 (97.5) 9.78 (±0.64) <0.001 10.12 (±0.63) <0.001
 Weekend days 2.263 (97.0) 9.99 (±0.72)   10.37 (±0.79)  
  1. *Household income category “Don’t know/Prefer not to answer” excluded from p trend calculations.
  2. **p values generated using an aggregate of ‘thinness grade 1’, thinness grade 2′ and thinness grade 3′ and ‘obese and morbid obese’ categories
  3. p value <0.05 was considered statistically significant