Table 4.

Scores points for the independent variables [8].

Risk factors	Points
Age
≥65 years	2
50–65 years	0
White blood cell
≥12 × 109/L	1
<12 × 109/L	0
Diabetes mellitus
Yes	2
No	0
Congestive Heart failure
Yes	2
No	0
Chronic kidney disease
Yes	1
No	0

Total score: ≤2: Low-risk; 3–6: Moderate-risk; ≥7: High-risk.