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Table 1 Descriptive statistics

From: Effect of the number of removed lymph nodes on prostate cancer recurrence and survival: evidence from an observational study

 

Nodes group 1-10

Nodes group 11-20

Nodes group 21+

Total

 

Mean

Med

Freq

Mean

Med

Freq

Mean

Med

Freq

Mean

Med

Freq

Nodes removed

7.1

7

 

15.3

15

 

27.8

26

 

16.6

15.0

 

Positive nodes

0.1

0

 

0.3

0

 

0.8

0

 

0.4

0.0

 

Age (years)

64.8

65.4

 

65.4

65.9

 

64.7

64.8

 

65.0

65.0

 

Gleason score

6.1

6

 

6.2

6

 

6.4

6

 

6.2

6.0

 

PSA

8.8

6.9

 

11.6

7.1

 

12.3

7.1

 

11.1

7.0

 

T1 stage

  

485 (58%)

  

756 (55%)

  

425 (50%)

  

1666 (55%)

T2 stage

  

281 (34%)

  

448 (33%)

  

288 (26%)

  

1017 (33%)

T3 stage

  

67 (8%)

  

163 (11.9%)

  

133 (14.0%)

  

363 (11.9%)

BCR (1 =yes)

  

93 (11%)

  

187 (14%)

  

79 (9%)

  

359 (12%)

OS (1 =dead)

  

19 (2%)

  

49 (4%)

  

16 (2%)

  

84 (3%)

N

  

833 (27%)

  

1367 (45%)

  

846 (28%)

  

3046 (100%)

  1. Note: Med indicates the median of the variable; Freq refers to absolute frequencies (the corresponding percentage frequencies are in italics)