Table 3.
Relative integrated discrimination improvement statistics (RIDI, %) comparing models with a given anthropometric variable with models for which the variable has been replaced by another anthropometric variable or their combination*
| Models | RIDI (95% confidence interval) ** | ||||
|---|---|---|---|---|---|
| Model 1 | Model 2 | Major cardiovascular (n = 1147) | Major coronary (n = 647) | Major Cerebrovascular (n = 584) | Cardiovascular death (n= 542) |
| BMI | WC | 2.8 (2.7 to 3.0) | 3.2 (3.0 to 3.3) | −2.5 (−2.8 to −2.2) | 1.3 (1.2 to 1.4) |
| WHR | 4.9 (4.6 to 5.1) | 6.2 (6.0 to 6.5) | −0.3 (−0.7 to 0.1)† | 7.0 (6.8 to 7.3) | |
| BMI + WC | 5.8 (5.6 to 6.1) | 4.6 (4.4 to 4.8) | 9.0 (8.6 to 9.4) | 2.9 (2.7 to 3.0) | |
| BMI + WHR | 5.2 (5.2 to 5.7) | 7.0 (6.8 to 7.3) | 4.7 (4.4 to 5.1) | 7.8 (7.6 to 8.1) | |
| WC | WHR | 2.0 (1.8 to 2.2) | 3.0 (2.7 to 3.2) | 2.3 (2.1 to 2.6) | 5.6 (5.4 to 5.8) |
| BMI + WC | 2.9 (2.7 to 3.0) | 1.3 (1.2 to 1.4) | 12.1 (11.6 to 12.6) | 1.6 (1.4 to 1.7) | |
| BMI + WHR | 2.6 (2.4 to 2.7) | 3.7 (3.5 to 4.0) | 7.7 (7.2 to 8.2) | 6.4 (6.2 to 6.7) | |
| WHR | BMI + WC | 1.0 (0.8 to 1.2) | −1.5 (−1.7 to −1.3) | 9.6 (9.1 to 10.1) | −3.8 (−3.9 to −3.6) |
| BMI + WHR | 0.6 (0.5 to 0.6) | 0.8 (0.7 to 0.8) | 5.3 (4.9 to 5.6) | 0.8 (0.7 to 0.8) | |
| BMI + WC | BMI + WHR | −0.3 (−0.5 to −0.1) | −5.0 (−5.2 to −4.8) | −3.8 (−4.0 to −3.5) | 4.8 (4.6 to 5.0) |
BMI, body mass index; WC, waist circumference; WHR, waist to hip ratio; RIDI, relative integrated discrimination improvement.
Models are adjusted for age, sex, current smoking, ethnicity and treatment allocation
*
For each line the models compared the replacement of the second with the first anthropometric variable in the first column;
**
All comparisons significant at p<0.001
†
Non-significant (p=0.07)