Table 1.
Pre and post-test food diary (FD) scores and change in FD scores for the total cohort, and according to grade, gender, and BMI category (mean change and 95% confidence intervals)
| Category | Variable | N (% of total) | Pre-test FD Scores% | Post-test FD Scores% | Δ FD Scores% (Post -Pre) | 95% CI | P | ||
|---|---|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | ||||||
| All | 1042 (100%) | 51.4% | 23.1 | 63.0% | 24.5 | 11.6% | 10.3%,13.0% | 0.000 | |
| Grade | Grade 1 | 497 (47.7%) | 52.7% | 22.7 | 62.9% | 24.4 | 10.2% | 8.2%,12.0% | 0.000 |
| Grade 2 | 545 (52.3%) | 50.1% | 23.4 | 63.1% | 24.5 | 13.0% | 11.1%,14.9% | 0.000 | |
| Gender | Male | 641 (61.5%) | 50.3% | 24.1 | 63.3% | 25.2 | 13.0% | 11.2%,14.7% | 0.000 |
| Female | 401 (38.5%) | 53.0% | 21.2 | 62.5% | 23.2 | 9.5% | 7.3%,11.6% | 0.000 | |
| BMI category* | UW | 162 (15.6%) | 50.5% | 23.5 | 63.7% | 25.8 | 13.2% | 9.7%,16.7% | 0.000 |
| NW | 613 (58.8%) | 51.2% | 22.6 | 63.5% | 23.7 | 12.3% | 10.5%,14.0% | 0.000 | |
| OW | 66 (6.3%) | 50.2% | 23.0 | 60.6% | 22.6 | 10.4% | 5.2%,15.7% | 0.000 | |
| OB | 46 (4.4%) | 47.7% | 25.1 | 60.1% | 25.1 | 12.4% | 6.9%,17.9% | 0.000 | |
*Excluding 155 (14.9%) students whose BMI data was not available