Table 1.
Characteristics of parents and their primary-school children aged 9–11 years participating in the Obesity Prevention and Lifestyle (OPAL) baseline evaluation (total male+female=3323)
| Demographic and anthropometric variables | n † | Mean, sd or % |
|---|---|---|
| Child age (years), mean | 3321 | 10·7 |
| sd | 0·87 | |
| Child gender | ||
| Female | 1704 | 51·3 |
| Child BMI Z-score‡, mean | 3101 | 0·317 |
| sd | 1·180 | |
| Child BMI (kg/m2), mean | 3103 | 18·50 |
| sd | 3·18 | |
| Child weight status§ | ||
| Healthy weight | 2258 | 72·8 |
| Overweight | 508 | 16·4 |
| Obese | 147 | 4·7 |
| Underweight | 188 | 6·1 |
| Child physical activity (d/week), mean | 3291 | 2·25 |
| sd | 1·71 | |
| Socio-economic status|| | ||
| Quintile 1 | 596 | 17·9 |
| Quintile 2 | 635 | 19·1 |
| Quintile 3 | 706 | 21·3 |
| Quintile 4 | 654 | 19·7 |
| Quintile 5 | 730 | 22·0 |
| Locality | ||
| Metropolitan | 2220 | 66·8 |
| Rural | 1103 | 33·2 |
| Parental education | ||
| Up to Year 12 (high school) | 1021 | 31·7 |
| Technical or trade qualification | 1153 | 35·8 |
| Tertiary qualification or higher | 1046 | 32·5 |
| Parental estimated annual household income ($AU) | ||
| 0–35 000 | 498 | 15·2 |
| 35 001–70 000 | 802 | 24·5 |
| 70 001–100 000 | 700 | 21·3 |
| >100 000 | 865 | 26·4 |
| Did not respond | 415 | 12·6 |
†
n varies from 3227 to 3295 due to missing data.
‡
UK 1990 cut-off points( 19 ).
§
International Obesity Task Force cut-off points( 20 ).
||
Determined from Index of Community Socio-Educational Advantage (ICSEA) scores (cut-offs of 981/987/1062/1064). Higher quintile represents a more advantaged background.