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
| 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) | ||
*Household income category “Don’t know/Prefer not to answer” excluded from p trend calculations.
**p values generated using an aggregate of ‘thinness grade 1’, thinness grade 2′ and thinness grade 3′ and ‘obese and morbid obese’ categories
p value <0.05 was considered statistically significant