Group

Number

Gross hematuria

Puncture port bleeding

Dysuria

Control group

57

7 (12.3)

5 (8.8)

6 (10.5)

Observation group

58

4 (6.9)

4 (6.9)

8 (13.8)

χ2

0.963

0.14

0.287

P

0.326

0.978

0.592