Table 1 : Demographic variables and distribution of patients by type of surgery.

Variable	Group 1 n = 112 (%)	Group 2 n = 110 (%)
Sex*
Female	39 (34.8)	71 (64.6)
Male	73 (65.2)	39 (35.5)
Age, years*	42.6 (± 18.9)	40.4 (±17.5)
Type of surgery*
Orthopedic	51 (45.6)	56 (50.9)
Abdominal or thoracic	61 (54.4)	54 (49.1)

*p>0.05 for studied variables.
Table 1 show demographic variables of the population assessed in both groups.