Table 1.
Descriptive statistics of measures by gender in a sample of secondary school students in the COMPASS study (2013/2014 data)
| Female (n= 22 149) | Male (n= 22 712) | T-test | |
|---|---|---|---|
| M (SD) | M (SD) | ||
| Age | 15.61 (1.213) | 15.66 (1.252) | −4.276, P < 0.0001 |
| n (%)a | n (%)a | χ2 | |
| Weight statusb | |||
| Underweight | 307 (1.4%) | 382 (1.7%) | 690.965 |
| Normal-weight | 13 596 (61.4%) | 11 909 (52.4%) | P < 0.0001 |
| Overweight | 2540 (11.5%) | 3793 (16.7%) | |
| Obese | 943 (4.3%) | 1914 (8.4%) | |
| Missing | 4763 (21.5%) | 4714 (20.8%) | |
| Grade | |||
| 9 | 5709 (25.8%) | 6016 (26.5%) | 13.931 |
| 10 | 5926 (26.8%) | 5833 (25.7%) | P = 0.008 |
| 11 | 5561 (25.1%) | 5604 (24.7%) | |
| 12 | 4927 (22.2%) | 5217 (23.0%) | |
| Ethnicity | |||
| White | 16 649 (75.2%) | 16 605 (73.1%) | 34.882 |
| Off-reserve Aboriginal | 808 (3.6%) | 773 (3.4%) | P < 0.0001 |
| Other/mixed/missing | 4692 (21.2%) | 5334 (23.5%) | |
| Cigarette smoking | |||
| Current | 1103 (5.0%) | 1822 (8.0%) | 188.469 |
| Former | 161 (0.7%) | 245 (1.1%) | P < 0.0001 |
| Never | 20 885 (94.3%) | 20 645 (90.9%) | |
| Weight goal | |||
| Trying to lose weight | 12 716 (58.1%) | 5394 (24.2%) | 7869.569 |
| Trying to gain weight | 975 (4.5%) | 7131 (31.9%) | P < 0.0001 |
| Trying to stay the same weight | 3954 (18.1%) | 3999 (17.9%) | |
| Not trying to do anything about weight | 4253 (19.4%) | 5797 (26.0%) | |
| Breakfast | |||
| Rarely skips | 12 244 (55.7%) | 14 111 (63.2%) | 258.712 |
| Skips 3+ week | 9731 (44.3%) | 8209 (36.8%) | P < 0.0001 |
| Reason for skipping breakfast | |||
| I do not have time | 7674 (34.6%) | 5492 (24.2%) | 592.386, P < 0.0001 |
| The bus comes too early | 2459 (11.1%) | 1833 (8.1%) | 119.104, P < 0.0001 |
| Slept in | 3415 (15.4%) | 2933 (12.9%) | 57.896, P < 0.0001 |
| I am not hungry in the morning | 5589 (25.2%) | 3901 (17.2%) | 436.503, P < 0.0001 |
| I feel sick when I eat breakfast | 3932 (17.8%) | 1401 (6.2%) | 1436.532, P < 0.0001 |
| I am trying to lose weight | 1464 (6.6%) | 282 (1.2%) | 863.882, P < 0.0001 |
| There is nothing to eat at home | 915 (4.1%) | 612 (2.7%) | 70.376, P < 0.0001 |
| Other | 525 (2.4%) | 638 (2.8%) | 8.549, P = 0.003 |
| Lunch | |||
| Rarely skips | 18 447 (83.7%) | 19 058 (85.2%) | 19.167 |
| Skips 3+ week | 3583 (16.3%) | 3300 (14.8%) | P < 0.0001 |
| Alcohol use | |||
| Regularly uses alcohol | 12 554 (57.6%) | 12 652 (57.4%) | 0.082 |
| Rare or non-drinker | 9260 (42.4%) | 9384 (42.6%) | P = 0.775 |
| Binge drinking | |||
| Regularly binge drinks | 4847 (21.9%) | 5946 (26.3%) | 114.900 |
| Rare or non-binge drinker | 17 236 (78.1%) | 16 672 (73.7%) | P < 0.0001 |
aNumbers may not add to total because of missing values.
bBody mass index (BMI) values used to determine weight status have been adjusted for age and gender.