Table 1.
Descriptive statistics of sociodemographic data, parental-reported and accelerometer-derived physical activity and sedentary behaviour in 2–9-year-old children from seven European countries taking part in the IDEFICS study, September 2007–June 2008
| Descriptive statistics | ||||||
|---|---|---|---|---|---|---|
| Variable | Description of the item | Response | n | % | Mean | sd |
| Sociodemographic data | ||||||
| Number | 5982 | |||||
| Age (years) | 6·08 | 1·78 | ||||
| 2–5-year-olds (%) | 44·2 | |||||
| Boys (%) | 50·6 | |||||
| Low SES (%) | 9·4 | |||||
| Medium SES (%) | 49·9 | |||||
| Overweight and obese† (%) | 16·3 | |||||
| Context-specific parental-reported measures | ||||||
| Sports participation (2 items; final measure in min/d) | 1. Is your child member in a sports club?2. How much time does he/she spend doing sport in a sports club per week? | Yes/NoHours and minutes (continuous) | 7·26 | 9·98 | ||
| OPC-derived outdoor play (6 items; final measure from 0 to 24) | 1. How much time does your child usually spend per day playing in the yard or street around your house (or the house of a friend, neighbour or relative)? Please indicate for every time frame. Include times while the child is at day care, kindergarten, pre-school or school. a. Wake-up time until noon b. Noon until 6 pm c. 6 pm until bedtime | 5-point scale|| (for each time frame) | 12·14 | 4·82 | ||
| 2. How much time does your child usually spend per day at a park, playground or outdoor recreation area (e.g. swimming pool, zoo or amusement park)? Please indicate for every time frame. Include times while the child is at day care, kindergarten, pre-school or school. a. Wake-up time until noon b. Noon until 6 pm c. 6 pm until bedtime | ||||||
| OPRQ-derived outdoor play‡ (2 items; final measure in min/d) | 1. Think for a moment about a typical weekday for your child in the last month. How much time would you say your child spends playing outdoors on a typical weekday?2. Now think about a typical weekend day for your child in the last month. How much time would you say your child spends playing outdoors on a typical weekend day? | Hours and minutes (continuous) | 133·99 | 59·60 | ||
| TV viewing§ (2 items; final measure from 0 to 35) | How long does your child usually watch TV/video/DVD per day? a. During weekdays b. During Saturdays/Sundays | 6-response category¶ (for each time frame) | 17·98 | 6·48 | ||
| Computer use§ (2 items; final measure from 0 to 35) | How long does your child usually sit at a computer/game console per day? a. During weekdays b. During Saturdays/Sundays | 6-response category¶ (for each time frame) | 5·53 | 6·45 | ||
| Accelerometer-derived measures | ||||||
| cpm/d | 605·15 | 165·49 | ||||
| LPA (% of time/d) | 40·17 | 7·08 | ||||
| MVPA (% of time/d) | 7·82 | 3·07 | ||||
| ST (% of time/d) | 52·01 | 8·53 | ||||
IDEFICS, Identification and Prevention of Dietary and Lifestyle induced Health Effects in Children and Infants; SES, socio-economic status (as defined by the highest parental education of both parents classified according to the International Standard Classification of Education); OPC, Outdoor Playtime Checklist; OPRQ, Outdoor Playtime Recall Questions; TV, television; cpm, counts per minute; LPA, light physical activity; MVPA, moderate-to-vigorous physical activity; ST, sedentary time; DVD, digital video disk.
Average per day, weighted for weekdays and weekend days.
Weighted sum score for weekdays and weekend days.
0 min, 1–15 min, 16–30 min, 31–60 min, >60 min.
Not at all, <30 min/d, <1 h/d, approximately 1–2 h/d, approximately 2–3 h/d, >3 h/d.