Table 1: statistical analysis of sex, operation type, and the risk factor.
Item Total no. Infected no. Rate P value (sig<0.05) 95% CI
lower upper
Sex Male 73 19 26 0.992 0.363 2.723
Female 27 7 25.9
Operation Type Major 60 23 38.3 0.001 0.036 0.472
Minor 40 3 7.5
>48h pre op. Hosp. 24 14 58.3 0.000 2.695 20.689