Table 4. Scoring System to Calculate Point Values for Risk Score.
| Variables | β (1) | Categories (2) | Reference Value (W) (2) | β (W - WREF) (3) | Pointsi = β (W - WREF) / B (4, 5) |
|---|---|---|---|---|---|
| Age | 0.057 | 70–74* | 72 (WREF) | 0 | 0 |
| 75–79 | 77 | 0.285 | 1 | ||
| 80–84 | 82 | 0.570 | 2 | ||
| 85–92 | 88.5 | 0.941 | 3 | ||
| Sex | 1.197 | Female* | 0 (WREF) | 0 | 0 |
| Male | 1 | 1.197 | 4 | ||
| Hypertension | 0.249 | No* | 0 (WREF) | 0 | 0 |
| Yes | 1 | 0.249 | 1 | ||
| Diabetes | 0.878 | No* | 0 (WREF) | 0 | 0 |
| Yes | 1 | 0.878 | 3 | ||
| Hyperlipidemia | -0.282 | No* | 0 (WREF) | 0 | 0 |
| Yes | 1 | -0.282 | -1 | ||
| Significant CAD | 1.541 | No* | 0 (WREF) | 0 | 0 |
| Yes | 1 | 1.541 | 5 |
*Reference category
1) Estimate the regression coefficients (β) of the multivariable model
2) Organize the risk factors into categories, determine the reference category, and reference values for each variable
3) Determine how far each category is from the reference category in regression units
4) Set the base constant (constant B)
5) Determine the number of points for each of the categories of each variable
CAD = coronary artery disease