Risk of cardiovascular disease (CVD) mortality by educational level with adjustment for baseline and repeated measurements of risk factors
| Model 1 (age sex) | Model 2 (baseline CVD risk factors) | Model 3 (repeated CVD risk factors) | |||
|---|---|---|---|---|---|
| Relative risk | HR (95% CI) | HR (95% CI) | HR change (%) | HR (95% CI) | HR change (%) |
| Education | |||||
| Basic | 2.32 (1.93 to 2.80) | 1.54 (1.28 to 1.87) | −48 | 1.45 (1.20 to 1.75) | −56 |
| Secondary | 1.67 (1.38 to 2.02) | 1.31 (1.09 to 1.59) | −47 | 1.26 (1.04 to 1.53) | −54 |
| Tertiary | 1 | 1 | 1 | ||
| Absolute risk | RD (95% CI) | RD (95% CI) | RD change (%) | RD (95% CI) | RD change (%) |
| Education | |||||
| Basic | 4.4 (3.6 to 5.2) | 1.7 (0.9 to 2.5) | −62 | 1.2 (0.4 to 2.0) | −72 |
| Secondary | 2.2 (1.5 to 3.0) | 0.7 (0.0 to 1.5) | −67 | 0.5 (−0.2 to 1.2) | −79 |
| Tertiary | 0 | 0 | 0 | ||
Education is classified as basic (7 or 9 years), secondary (10–12 years) and tertiary (≥13 years).
CVD risk factors include daily smoking, systolic blood pressure, serum total cholesterol and body mass index. All continuous variables are modelled as third-degree polynomials.
Model 1: Adjusted for age and sex.
Model 2: Model 1+adjustment for CVD risk factors measured at the baseline screening.
Model 3: Model 2+adjustment for CVD risk factors measured at the second and third screening.
HR change (%)=100×(log HRModel 1 − log HRModel i)/(log HRModel 1), i=2–3.
RD change (%)=100×(RDModel 1 − RDModel i)/(RDModel 1), i=2–3.
RD, risk difference.