Table 3.
Predictors from logistic regression used in the construction of the SAFINOUS score
| Variable | Categories | Reference | Wij | βi | βi (Wij –Wiref) | Points |
|---|---|---|---|---|---|---|
| Age, y | 30-39 | 34.5 | W1ref | 0.015 | –0.30 | –2 |
| 40-49 | 44.5 | –0.15 | –1 | |||
| 50-59 | 54.5 | 0 | 0 | |||
| 60-69 | 54.5 | 0.15 | 1 | |||
| 70-79 | 74.5 | 0.30 | 2 | |||
| 80-89 | 84.5 | 0.45 | 3 | |||
| Sex | Male | W2ref | –0.632 | –0.632 | –3 | |
| Dyslipidemia | W4ref | 0.284 | 0.284 | 1 | ||
| Diabetes | W5ref | 0.361 | 0.361 | 3 | ||
| Active smoking | W6ref | 0.452 | 0.452 | 3 | ||
| Creatinine, mg/dL | 0.50-0.99 | 0.75 | W7ref | 0.546 | –0.273 | –2 |
| 1.00-1.49 | 1.25 | 0 | 0 | |||
| 1.50-1.99 | 1.75 | 0.273 | 2 | |||
| 2.00-2.49 | 2.25 | 0.546 | 4 | |||
| ≥2.50 | 3.50 | 1.229 | 8 | |||
| Endoscopic harvesting | W9ref | –0.426 | –0.426 | –3 | ||
| Complex grafts | W10ref | 0.632 | 0.632 | 4 | ||
| Number of SVG | 1 | 1 | W11ref | 0.291 | 0 | 0 |
| 2 | 2 | 0.291 | 2 | |||
| ≥3 | 3 | 0.582 | 4 | |||
| Graft in diagonal | W12ref | 0.643 | 0.643 | 4 | ||
| Graft in LCx/OM | W13ref | 0.615 | 0.615 | 4 | ||
| Graft in RCA | W14ref | 0.386 | 0.386 | 3 |
Points were assigned to each variable using as 1 point the risk related with a 10-year increment in age (constant B = 10 × 0.015 = 0.15) and rounded to nearest integer. SVG, Saphenous vein graft; LCx, left circumflex artery; OM, obtuse marginal; RCA, right coronary artery.