Table 2 Odds Ratio Estimates for patients surviving > 18 months in patients with low-grade versus high grade-HCMV infection in their tumors and prognostic factors important for GBM patients survival (Age, Extent of Resection, RPA Subclass and gamma knife treatment) by Multiple Logistic regression analysis.

HCMV infection: Non to Low-grade vs. moderate to high-grade

1.359

6.604

32.094

.019*

0.425

1.264

3.758

.67

Age group: <50 vs ≧ 50 y

0.080

0.338

1.428

.142

0.081

0.339

1.412

.137

Gender Female vs Male

0.317

0.965

2.938

.95

0.335

0.962

2.763

94

Extent of surgery: Radical vs partial

0.404

2.489

15.348

.326

0.342

1.723

8.691

.50

RPA: III and IV vsV and VI

2.148

8.161

30.997

.002*

2.615

9.504

34.545

.0006*

Gammaknife vs. no Gammaknife treatment

0.326

1.339

5.505

.068

1.41

1.409

5.475

.62