Table 1. Characteristics of study populationa according to BMI category at baseline.
| Participant characteristic |
BMI (kg m−2) at baseline |
Total | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Underweight | Normal weight | Overweight | Obese | ||||||
| |
15–18.49 |
18.5–19.99 |
20–22.49 |
22.5–24.99 |
25–27.49 |
27.5–29.99 |
30–32.49 |
32.5–50 |
|
| N | 1867 | 4660 | 20 726 | 35 908 | 36 048 | 26 205 | 15 723 | 17 409 | 158 546 |
| % Out of total | 1.2% | 2.9% | 13.1% | 22.6% | 22.7% | 16.5% | 9.9% | 11.0% | 100% |
| Median age (interquartile range) | 59 (19) | 57 (16) | 57 (15) | 58 (15) | 59 (14) | 58 (13) | 58 (13) | 57 (12) | 58 (14) |
| Male | 22.4 | 19.3 | 28.0 | 42.0 | 52.4 | 54.7 | 48.5 | 37.2 | 43.8 |
| Residing in major cities | 47.0 | 49.7 | 48.4 | 46.7 | 44.8 | 42.5 | 41.6 | 38.8 | 44.5 |
| Tertiary education | 24.0 | 29.9 | 30.9 | 29.7 | 27.1 | 24.5 | 21.8 | 19.1 | 26.4 |
| Household income ⩾$70 000 | 16.5 | 25.7 | 27.5 | 29.7 | 30.8 | 30.4 | 28.2 | 25.4 | 28.9 |
| Current smoker | 18.0 | 11.9 | 9.6 | 7.8 | 7.0 | 7.1 | 7.5 | 8.0 | 8.0 |
| ⩾15 Alcoholic drinks per week | 8.9 | 8.5 | 10.6 | 13.8 | 16.7 | 17.8 | 16.4 | 12.9 | 14.6 |
| Highest physical activity tertile | 40.2 | 39.7 | 40.9 | 38.8 | 36.3 | 33.0 | 30.1 | 24.8 | 35.2 |
| Doctor diagnosed diabetes | 3.2 | 2.4 | 2.5 | 3.6 | 4.7 | 6.7 | 8.3 | 13.7 | 5.8 |
| Current treatment for hypertension | 10.4 | 8.7 | 10.0 | 13.4 | 16.9 | 21.2 | 24.6 | 32.0 | 18.0 |
| Current treatment for hypercholesterolaemia | 6.5 | 5.9 | 6.9 | 9.4 | 11.8 | 14.0 | 14.4 | 14.8 | 11.3 |
| Private health insurance | 56.6 | 64.2 | 67.1 | 68.6 | 69.0 | 67.9 | 66.0 | 61.2 | 67.0 |
| Aspirin treated | 5.9 | 5.3 | 6.4 | 7.7 | 8.8 | 9.8 | 10.3 | 11.3 | 8.7 |
Abbreviations: BMI, body mass index; CVD, cardiovascular disease; ICD-10-AM, International Classification of Diseases 10th revision—Australian, Modification.
Data are percentage of sample within BMI category, unless indicated otherwise.
Only those without a history of CVD at baseline. A history of CVD at baseline was defined as either self-reported heart disease, stroke or blood clot on the baseline questionnaire or a hospital admission in 6 years before entering the study, with ICD-10-AM diagnosis codes I00–I99, G45 and G46 in any of the 55 diagnostic fields or Australian Health Intervention Classification CVD-related procedure codes (coronary artery bypass angioplasty/stent: 35310, 38306, 35304-00, 30305-00, 38300-00, 38303-00; coronary artery bypass graft: 38497, 38500, 38503, 90201; coronary revascularisation procedures: 38497, 38500, 38503, 90201, 35310, 38306, 35304-00, 30305-00, 38300-00, 38303-00) in any of the 50 procedure code fields.