Table 1.
Descriptive characteristics of included participants from 20 studies.
| Studies | N | Descriptive data | |
|---|---|---|---|
| Sex | 1–20 | 24,025 | |
| N (%) Boys | 10,756 (44.7) | ||
| N (%) Girls | 13,279 (55.3) | ||
| Age (years) | 1–20 | 24,025 | |
| Mean (SD) | 11.02 (2.63) | ||
| Range | 5.0–18.0 | ||
| Location | 1–20 | 24,025 | |
| N (%) UK | 9767 (40.7) | ||
| N (%) Continental Europe | 4350 (18.1) | ||
| N (%) US | 6973 (29.0) | ||
| N (%) Brazil | 455 (1.9) | ||
| N (%) Australia | 2480 (10.3) | ||
| Weight status | 1–20 | 19,705 | |
| N (%) Overweight/obese | 2002 (10.2) | ||
| Ethnicity | 5, 8, 10–13, 15, 17, 18 | 10,219 | |
| N (%) White | 5344 (52.3) | ||
| N (%) Black | 2081 (20.4) | ||
| N (%) Hispanic | 2109 (20.6) | ||
| N (%) Other | 685 (6.70) | ||
| Maternal education | 1–3, 5–8, 10, 12, 14, 16, 19 | 11,916 | |
| N (%) ≥ High school | 6271 (52.6) | ||
| N (%) College | 1975 (16.6) | ||
| N (%) ≥ University | 3670 (30.8) | ||
| Physical activity (min/day) | 1–20 | 24,025 | |
| VPA (Median [IQR]) | 10.6 [5.2, 19.5] | ||
| MPA (Median [IQR]) | 34.25 [23.0, 47.9] | ||
| Wear time (Mean(SD)) | 769.7 (88.6) | ||
| Sedentary (Mean(SD)) | 349.1 (103.2) |
VPA Vigorous-intensity physical activity.
MPA Moderate-intensity physical activity.
Maternal education: Mothers highest education 1 “up to and including high school” 2 “college vocational training” 3 “University +”.
Studies: 1 “ALSPAC” (Boyd et al., 2013) the study includes a searchable data dictionary 2 “Belgium Pre-School Study” (Cardon and De Bourdeaudhuij, 2007) 3 “CLAN” (Crawford et al., 2010) 4 “CSCIS” (Eiberg et al., 2005) 5 “Denmark EYHS” (Brage et al., 2004) 6 “Estonia EYHS” (Riddoch et al., 2005) 7 “HEAPS” (Salmon et al., 2006) 8 “IOWA” (Janz et al., 2001) 9 “NHANES 2005–6” (Centers for Disease Control and Prevention, 2005) 10 “Norway EYHS” (Ommundsen et al., 2006) 11 “NHANES 2003–4” (Centers for Disease Control and Prevention, 2005) 12 “PEACH” (Page et al., 2009) 13 “Pelotas” (Victora et al., 2008) 14 “Portugal EYHS” (Sardinha et al., 2008) 15 “SPEEDY” (van Sluijs et al., 2008) 16 “Project TAAG” (Stevens et al., 2005) 17 “CHAMPS UK” (Gidlow et al., 2008) 18 “Ballabeina Study” (Niederer et al., 2009) 19 “KISS” (Zahner et al., 2006) 20 “CHAMPS US” (Pfeiffer et al., 2009).