Table 3.

Risk factors predictive of C. difficile infection.

Risk factor	Odds ratio (95% CI)	P value
Antibiotics	3.35 (2.78–4.03)	6.2 × 10−37
Immunosuppression	2.47 (2.06–2.96)	8.4 × 10−23
Recent hospitalization	3.32 (2.72–4.06)	1.8 × 10−31
Current hospitalization	2.94 (2.40–3.61)	8.4 × 10−25
Prior CDI	5.84 (4.42–7.72)	1.6 × 10−35
Any one risk factor	1.16 (0.74–1.83)	0.51
Any two risk factors	3.89 (2.76–5.48)	7.4 × 10−15
Any three risk factors	5.00 (3.59–6.96)	1.2 × 10−21
Any four risk factors	9.28 (6.67–12.91)	5.4 × 10−40
All five risk factors	24.24 (12.96–45.32)	1.8 × 10−23