Table 1.
Descriptive data of the study sample of primary-school children (4th graders in 2007, 7th graders in 2010), Telemark County, Norway (n 428)
| 4th grade | 7th grade | P value* | |
|---|---|---|---|
| BMI category | |||
| Underweight (%) | 3 | 1 | 0·655 |
| Normal weight (%) | 81 | 85 | |
| Overweight (%) | 14 | 12 | |
| Obese (%) | 2 | 3 | |
| Physical activity outside school (h/week) | 3·3 | 4·5 | <0·001 |
| 95 % CI | 3·3, 3·4 | 4·4, 4·7 | |
| Meal pattern | |||
| Regular breakfast (%) | 91 | 90 | 0·263 |
| Regular lunch (%) | 81 | 75 | 0·010 |
| Regular dinner (%) | 85 | 84 | 0·569 |
| Regular evening meal (%) | 67 | 53 | <0·001 |
| Regular all 4 meals (%) | 47 | 38 | 0·001 |
*Paired-sample t test was used to analyse changes in physical activity and χ 2 tests were used to analyse changes in all other variables.