Table 2.

Risk factors for shunt infection independent of the treatment (AIS vs non-AIS)

Risk factor	Odds Ratios	P value
Age (< 1 year and > 80 years)	0.5 (0.06–3.7)	0.7010
Premature birth	2.1 (0.6–7.9)	0.2300
External ventricular drainage	1.9 (0.7–5.5)	0.2732
Former shunt infection	5.0 (1.6–16.0)	0.0124*
Former systemic infection	2.9 (1–8.8)	0.0605
Disturbance of consciousness	2.1 (0.6–7.9)	0.2300
Former Radiation-/Chemotherapy	2.2 (0.6–8.3)	0.2138

Odds ratio (OR) and 95 % confidence interval were calculated on the basis of Fisher's exact test, *significant at p < 0.05;