Logistic regression analysis relating HLA status (2DAE) and baseline ESR on requirement for surgery
| Variable | Regression coefficient | Standard error | Significance |
|---|---|---|---|
| Two DAE | 1.6877 | 0.5569 | 0.0024 |
| ESR | 0.0343 | 0.0085 | 0.001 |
| Constant | −1.776 | 0.4226 | <0.0001 |
Logit (P) or l = −1.776 + 1.6877 x1 + 0.0343 x2, were x1 is the presence (x=1) or absence (x=2) of 2 DAE; x2 is the ESR at first clinic visit; P = probability of surgery.