Table 2.
Associations between social class, body mass index and smoking and prevalence of cardiovascular disease (CVD)
| 1994 | 1998 | 2003 | |||||
|---|---|---|---|---|---|---|---|
| % CVD | Adjusted* OR (95% CI) | % CVD | Adjusted* OR (95% CI) | % CVD | Adjusted* OR (95% CI) | ||
| Registrar General's social class classification | I | 8.5 | 1.00 | 8.2 | 1.00 | 9.4 | 1.00 |
| II | 10.8 | 1.26 (0.86, 1.85) | 10.6 | 1.35 (0.94, 1.93) | 11.2 | 1.28 (0.92, 1.79) | |
| IIIa | 11.7 | 1.17 (0.78, 1.75) | 14.0 | 1.55 (1.06, 2.27) | 14.6 | 1.55 (1.09, 2.20) | |
| IIIb | 13.3 | 1.45 (1.00, 2.11) | 13.8 | 1.69 (1.18, 2.41) | 13.9 | 1.43 (1.03, 1.99) | |
| IV | 14.5 | 1.53 (1.03, 2.27) | 16.9 | 1.98 (1.37, 2.86) | 16.2 | 1.76 (1.24, 2.49) | |
| IV | 13.0 | 1.35 (0.87, 2.11) | 19.0 | 2.40 (1.59, 3.63) | 22.1 | 2.45 (1.64, 3.64) | |
| BMI** (kg m-2) | <20 | 8.4 | 1.00 | 11.4 | 1.00 | 12.6 | 1.00 |
| 20–24 | 9.3 | 1.32 (0.81, 2.16) | 10.4 | 1.06 (0.67, 1.67) | 9.7 | 0.72 (0.44, 1.20) | |
| 25–29 | 13.2 | 1.84 (1.14, 2.98) | 12.6 | 1.23 (0.79, 1.92) | 12.2 | 0.84 (0.51, 1.37) | |
| 30–34 | 13.3 | 1.91 (1.15, 3.16) | 14.0 | 1.49 (0.94, 2.36) | 14.6 | 1.08 (0.65, 1.79) | |
| 35+ | 13.8 | 2.34 (1.32, 4.12) | 15.7 | 2.07 (1.24, 3.46) | 15.7 | 1.51 (0.88, 2.61) | |
| Smoking | Never | 9.2 | 1.00 | 10.4 | 1.00 | 10.9 | 1.00 |
| Ex- | 15.6 | 1.52 (1.28, 1.82) | 17.0 | 1.45 (1.24, 1.70) | 17.1 | 1.36 (1.16, 1.59) | |
| Current | 9.5 | 1.19 (0.95, 1.49) | 10.9 | 1.27 (1.04, 1.56) | 11.5 | 1.38 (1.12, 1.70) | |
*adjusted for age and sex **Body Mass Index