Table 3 Univariate and multivariate analysis of the risk factors identified. All those with statistically significant Odds Ratios, at 95% confidence, are in bold

Clinical characteristics

OR (95% CI)

P Value

OR(95% CI)

P Value

Prolonged hospital stay^b (≥ 7 days of hospital admission)

1.1 (0.5–2.5)

0.869

0.6 (0.2–1.7)

0.381

Age group (< 18 years as reference)

0.338

18–60 years

2.6 (0.7–9.0)

0.144

> 60 years

2.5 (0.6–10.7)

0.214

Female (Male as reference)

0.5 (0.2–1.2)

0.128

Organisms (Clostridium species as reference)

0.876

Bacteroides fragilis

0.6 (0.06–5.1)

0.611

Bacteroides other than fragilis

1.2 (0.5–3.0)

0.662

Others^a

1.016 (0.3–3.1)

0.978

Diabetes Mellitus

0.3 (0.06–1.3)

0.119

Malignancy/transplant

5.6 (1.7–17.9)

0.003

6.3(1.7–23.3)

0.005

Dialysis

4.2(0.2–68.5)

0.315

Bacteremia

2.3 (1.0–5.1)

0.041

2.1 (0.9–4.7)

0.089

Skin and soft tissue infection

0.6 (0.2–1.3)

0.181

Head and neck infections

0.4 (0.09–2.0)

0.302

Intraabdominal infections

1.1 (0.5–2.4)

0.739

Respiratory tract infections

2.1 (0.4–11.9)

0.399

Genitourinary infections

0.5 (0.1–2.4)

0.402

Expired

2.5 (0.7–9.0)

0.161