Table 1 Demographic data for 157 patients

Age (years)

63.3

(34 - 100)

Sex

   Male

51

(32.5)

   Female

106

(67.5)

Year of Procedure

   1998

2

(1.3)

   1999

2

(1.3)

   2000

6

(3.8)

   2001

10

(6.4)

   2002

18

(11.5)

   2003

16

(10.2)

   2004

10

(6.4)

   2005

21

(13.4)

   2006

34

(21.7)

   2007

38

(24.2)

Type of Procedure

   Laparoscopic PN†

10

(6.4)

   Laparoscopic RN‡

100

(63.7)

   Open PN

8

(5.1)

   Open RN

39

(24.8)

Histological subtype

   Conventional

126

(80.3)

   Papillary

16

(10.2)

   Chromophobe

11

(7.0)

   Other

4

(2.5)

Mixed

2

Neuroendocrine

1

Unclassified

1

Pathological T stage

   pT1a

58

(36.9)

   pT1b

41

(26.1)

   pT2a

18

(11.5)

   pT2b

5

(3.2)

   pT3a

30

(19.1)

   pT3b

2

(1.3)

   pT3c

2

(1.3)

   pT4

1

(0.6)