Table 1.
Descriptive characteristics (mean (SD)) of participants includeded in the main analyses of temporal trends in physical activity (i.e.with ≥2 days of valid of accelerometer data) by agegroup, cohort and sex (n = 8186)a
| n a | Age (yrs.) | Height (cm) | Weight (kg) | BMI (kg.m−2) | WC (cm) | Socioeconomic status b | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Low (%) | Medium (%) | High (%) | Missing (%) | |||||||
| BOYS | ||||||||||
| 6-y-olds | ||||||||||
| 2011 | 494 (475) | 6.6 (0.4) | 122.2 (5.8) | 24.0 (3.7) | 16.0 (1.6) | 54.8 (4.2) | 4.5% | 33.2% | 61.1% | 1.2% |
| 2018 | 411 (403) | 6.5 (0.4) | 121.5 (5.5) | 23.4 (3.6) | 15.8 (1.6)* | 54.6 (4.0) | 2.9% | 20.9% | 60.1% | 16.1% |
| 9-y-olds | ||||||||||
| 2005 | 599 (593) | 9.6 (0.4) | 139.9 (6.2) | 33.9 (6.3) | 17.2 (2.4) | 62.1 (7.2) | 9.7% | 34.1% | 44.1% | 12.2% |
| 2011 | 652 (630) | 9.6 (0.4) | 138.7 (6.8) | 34.0 (7.0) | 17.6 (2.8) | 60.8 (6.7)* | 5.8% | 39.1% | 53.4% | 1.7% |
| 2018 | 607 (597) | 9.5 (0.4) | 139.2 (6.3) | 33.9 (6.5) | 17.4 (2.5) | 60.9 (6.2) | 1.2% | 17.0% | 61.8% | 20.1% |
| 15-y-olds | ||||||||||
| 2005 | 340 (334) | 15.6 (0.4) | 175.6 (7.1) | 65.2 (12.8) | 21.1 (3.7) | 75.5 (9.4) | 5.6% | 32.9% | 34.7% | 26.8% |
| 2011 | 480 (430) | 15.2 (0.6)* | 173.2 (8.0)* | 62.3 (12.0)* | 20.7 (3.3) | 73.1 (8.7)* | 7.3% | 38.1% | 50.4% | 4.2% |
| 2018 | 491 (444) | 15.4 (0.4)** | 175.1 (7.4)** | 63.5 (11.3) | 20.6 (3.0) | 72.7 (6.9)* | 2.9% | 15.1% | 56.4% | 25.7% |
| GIRLS | ||||||||||
| 6-y-olds | ||||||||||
| 2011 | 510 (493) | 6.6 (0.4) | 120.9 (5.4) | 23.8 (4.2) | 16.2 (2.0) | 54.4 (5.0) | 5.3% | 32.2% | 60.6% | 2.0% |
| 2018 | 427 (412) | 6.5 (0.4) | 120.7 (5.3) | 23.3 (3.6) | 15.9 (1.7)** | 53.8 (4.3) | 2.3% | 15.9% | 64.4% | 17.3% |
| 9-y-olds | ||||||||||
| 2005 | 524 (518) | 9.6 (0.4) | 138.4 (6.8) | 34.0 (7.1) | 17.6 (2.7) | 63.3 (7.7) | 6.7% | 38.4% | 45.0% | 9.9% |
| 2011 | 692 (679) | 9.6 (0.4) | 138.0 (6.5) | 33.7 (6.8) | 17.6 (2.7) | 59.4 (6.5)* | 7.4% | 35.3% | 54.9% | 2.5% |
| 2018 | 613 (594) | 9.5 (0.4) | 138.3 (6.5) | 33.8 (7.0) | 17.5 (2.6) | 59.6 (6.6)* | 2.6% | 20.7% | 57.1% | 19.6%. |
| 15-y-olds | ||||||||||
| 2005 | 360 (356) | 15.6 (0.4) | 165.6 (6.5) | 58.0 (8.7) | 21.1 (2.8) | 73.3 (6.9) | 8.3% | 36.9% | 34.7% | 20.0% |
| 2011 | 489 (422) | 15.2 (0.6)* | 165.0 (6.2) | 57.4 (9.5) | 21.1 (3.1) | 69.2 (6.7)* | 6.1% | 38.2% | 53.0% | 2.7% |
| 2018 | 497 (457) | 15.4 (0.4)** | 165.4 (6.1) | 58.3 (9.9) | 21.3 (3.3) | 68.8 (6.9)* | 3.6% | 13.3% | 58.8% | 24.4% |
Abbreviations: yrs. years, BMI body mass index, WC waist circumference
* Significantly different from 2005 (from 2011 in 6-y-olds) (p ≤ 0.049)
** Significantly different from 2005 & 2011 (p < 0.01)
a n varies for the different anthropometric measurements and is lowest (in parenthesis) for WC except in 15-y-old boys (weight) and 15-y-old girls (BMI)
b Based on parental education level (the parent with the highest attained education level), with low = primary school or lower secondary school, middle = high school (vocational or general studies), and high = University College or University degree. Note that parental education levels are based on self-reports in 2005 and 2018, and from linkage with registry data (Statistics Norway) in 2011