Table 1 Demographic data of patients between groups investigated

Number of patients

n = 76

n = 67

-

Mean age at surgery in years ± standard deviation

72 ± 8

67 ± 7

p = 0.0001

male/female

33/43

22/45

n.s.

Mean body mass index (BMI) ± standard deviation (range)

29 ± 5 (20-42)

31 ± 5 (22-42)

p = 0.012

Mean follow up time ± standard deviation

25 ± 3

26 ± 5

n.s.