Table 1.
Baseline comparison of characteristics of women who were in the analysis (n = 4241) and left out of the analysis due to missing exposure and outcome data (n = 4840)*
| Characteristics at baseline (survey 3) | In analysis | Out of analysis* | p valuea |
|---|---|---|---|
| n = 4241 | n = 4840 | ||
| Mean age (SD) | 27.6 (1.45) | 27.6 (1.46) | 0.2 |
| CESD-10 | 6.4 (4.98) | 7.5 (5.49) | < 0.0001 |
| Sociodemographic variables | |||
| Area of residence | < 0.0001 | ||
| Major cities | 58.4% | 53.8% | |
| Inner regional | 25.3% | 28.4% | |
| Outer regional/remote/very remote | 16.3% | 17.8% | |
| Marital status | < 0.0001 | ||
| Married/ de facto | 62.0% | 60.8% | |
| Single | 35.5% | 34.4% | |
| Separated/divorced/widowed | 2.5% | 4.8% | |
| Education | < 0.0001 | ||
| High school/less | 22.4% | 36.8% | |
| Trade/college | 23.8% | 27.3% | |
| University | 53.8% | 35.9% | |
| Ability to manage income | < 0.0001 | ||
| No difficulty/not too bad | 64.6% | 52.1% | |
| Difficult sometimes | 26.6% | 33.2% | |
| Very difficult/impossible | 8.8% | 14.8% | |
| Having a child | < 0.0001 | ||
| No | 75.1% | 61.6% | |
| Yes | 24.9% | 38.4% | |
| Health behaviours | |||
| Smoking | < 0.0001 | ||
| Never | 62.1% | 52.8% | |
| Ex-smoker | 18.6% | 18.4% | |
| Irregular smoker | 4.9% | 4.8% | |
| Weekly smoker | 2.3% | 2.9% | |
| Daily smoker | 12.1% | 21.2% | |
| Physical activity | < 0.0001 | ||
| Nil/sedentary | 7.3% | 10.8% | |
| Low | 39.2% | 39.3% | |
| Moderate | 23.9% | 21.7% | |
| High | 29.6% | 28.2% | |
| Alcohol consumption | 0.005 | ||
| Non-drinker | 7.0% | 9.0% | |
| Rarely drinks | 65.6% | 57.1% | |
| Low-risk drinker | 24.4% | 29.7% | |
| Risky/high risk drinker | 3.0% | 4.2% | |
| BMI categories | < 0.0001 | ||
| Acceptable weight | 61.4% | 55.7% | |
| Underweight | 4.2% | 4.8% | |
| Overweight | 21.3% | 22.8% | |
| Obese | 13.1% | 16.8% | |
| History of chronic diseasesb | 0.725 | ||
| No | 97.8% | 97.7% | |
| Yes | 2.2% | 2.3% | |
| Fish consumption | 0.034 | ||
| Never | 7.6% | 8.6% | |
| < 30 g/day | 58.4% | 55.9% | |
| ≥ 30 g/day | 34.0% | 35.5% |
CESD Center for Epidemiological Studies Depression, SD standard deviation
*Numbers may vary due to missing values
ap values from t test or chi-square test. All statistical tests were conducted using a two-sided 5% level of significance
bChronic diseases in this study were heart disease, hypertension, diabetes