Table 1. Comparison of baseline characteristics of respondents and non-respondents at 3-year follow-up.
| Loss-follow-up (n = 3954) | Follow-up (n = 3131) | Cohen’s effect size a | ||
|---|---|---|---|---|
| Age | 15–24 | 19.1 | 18.5 | 0.27 |
| 25–34 | 17.4 | 10.3 | ||
| 35–44 | 21.6 | 19.8 | ||
| 45–54 | 17.7 | 23.8 | ||
| 55–64 | 10.4 | 12.7 | ||
| 65–74 | 8.6 | 10.0 | ||
| ≥75 | 5.1 | 5.0 | ||
| Sex | Female | 51.9 | 53.0 | 0.02 |
| Male | 48.1 | 47.0 | ||
| Place of birth | Hong Kong | 63.1 | 54.2 | 0.19 |
| Guangdong province | 23.8 | 31.8 | ||
| Macau | 1.0 | 1.3 | ||
| Other provinces in China | 9.7 | 10.7 | ||
| Others | 2.4 | 2.1 | ||
| Marital status | Single | 33.9 | 28.3 | 0.14 |
| Married | 58.2 | 64.6 | ||
| Divorced/separated | 2.7 | 2.1 | ||
| Widowed | 5.3 | 4.9 | ||
| Education | ≤Primary | 23.7 | 32.9 | 0.31 |
| Secondary | 56.9 | 56.2 | ||
| Tertiary | 19.4 | 10.8 | ||
| Personal income | <$10,000 | 22.1 | 22.8 | 0.25 |
| $10,000 to $19,999 | 18.4 | 14.4 | ||
| ≥$20,000 | 10.5 | 5.8 | ||
| No income | 45.0 | 53.1 | ||
| Not willing to answer | 4.1 | 3.8 | ||
| Central obesity | No | 79.1 | 71.8 | 0.16 |
| Yes | 20.9 | 28.2 | ||
| BMI | Underweight (≤18.4) | 11.3 | 10.0 | 0.16 |
| Normal (18.5–22.9) | 52.4 | 46.0 | ||
| Overweight (23–24.9) | 17.5 | 19.9 | ||
| Obese (≥25) | 18.8 | 24.1 | ||
| Grossly obese (BMI ≥30) | No | 97.6 | 96.6 | 0.06 |
| Yes | 2.4 | 3.4 |
a Effects size based on Cohen’s w: 0.1 for small; 0.3 for medium; 0.5 for large