Group

Complications

 pre op post op p-value

Incidence Risk

 0.08
(95%CI 0.02 to 0.13)		 0.04
(95%CI 0.01 to 0.07)		  

Crude Risk Ratio

0.51 (95%CI 0.18 to 1.48) p=0.211

Adjusted for age

 0.57 (95%CI 0.19 to 1.7) p=0.314

Adjusted for gender

 0.62 (95%CI 0.21 to 1.86) p=0.393
Table 2: Incidence risk of complications and crude risk ratio in the Poisson model were in both groups not significant; even adjusted to covariates as age and gender.