Table 1.
Description of variables from the Longitudinal Study of Australian Children used in the simulation study for respondent i at wave j
| Variable | Type | Grouping/Units | Label |
|---|---|---|---|
| Study child’s BMI for agea | Continuous | z-score | BMIzij |
| Maternal smoking | Categorical | 0 = Never-smoker 1 = Ex-smoker |
m_smokingij |
| 2 = Current-smoker | |||
| Maternal depression | Categorical | 0 = No | m_depressionij |
| 1 = Yes | |||
| Maternal age at child birth | Continuous | Years | m_agei |
| Maternal education | Categorical | 0 = Not completed 1 = Completed |
m_educationi |
| Breastfeeding | Categorical | 0 = No 1 = Yes |
breastfedi |
| Family socio-economic status | Continuous | z-score | sesi |
| Study child’s sex | Categorical | 0 = Female 1 = Male |
sexi |
| Study child’s birth weight | Continuous | kilograms | birthweighti |
| Study child’s age | Continuous | Months | scageij |
Abbreviations: BMI, body mass index
aRaw BMI measurements converted into BMI for age z-scores using the 2000 Centre for Disease Control growth charts