| |
Group 1 (perforation)
|
Group 2 (no perforation)
|
P value (group 1 vs. group 2)
|
Total
|
|---|
|
Number of patients
|
11
|
13
|
n.a.
|
24
|
|
Men
|
7
|
6
| |
11
|
|
Women
|
4
|
7
|
0.39 *
|
13
|
|
Mean age of patients (years)
|
74.8
|
72.3
|
0.32 **
|
73.5
|
|
% of recurrent tumours
|
45.5
|
38.5
|
0.73 *
|
41.7
|
|
Mean recurrence rate (for recurrent tumours)
|
0.58/year
|
1.18/year
|
0.17 ***
|
0.92/year
|
|
Mean tumour diameter (centimetres)
|
2.25
|
1.68
|
0.45 ***
|
1.94
|
|
% of operations performed by residents in training
|
45.5
|
53.8
|
0.22 *
|
50.0
|
|
Stage of bladder cancer
|
Ta
|
8
|
13
|
0.13 *
|
21
|
|
Tis
|
0
|
0
|
0
|
|
T1
|
2
|
0
|
2
|
|
≥ T2
|
1
|
0
|
1
|
|
Cancer grade
|
Low grade
|
6
|
11
|
0.11 *
|
17
|
|
High grade
|
5
|
2
|
7
|
- Stage of bladder cancer (according to TNM classification)
- Ta non-invasive papillary carcinoma, Tis carcinoma in situ, T1 tumour invades subepithelial connective tissue, T2 tumour invades the muscle
- *Pearson’s chi-square test
- **unpaired t test
- ***Mann-Whitney U test
