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Table 3 Vasectomy failures based on semen analysis, by treatment and age group

From: Vasectomy by ligation and excision, with or without fascial interposition: a randomized controlled trial [ISRCTN77781689]

Age group, years

Number and percentage of failures (95% CI)

 

With fascial interposition

Without fascial interposition

Overall

24

5.9% (3.8, 8.6)

53

12.7% (9.7, 16.3)

<30

5

4.6% (1.5, 10.4)

12

14.1% (7.5, 23.4)

30 to 34

10

7.9% (3.8, 14.0)

19

15.1% (9.3, 22.5)

35 to 39

6

6.3% (2.3, 13.1)

10

9.6% (4.7, 17.0)

40+

3

3.6% (0.7, 10.1)

12

11.9% (6.3, 19.8)

  1. CI: Confidence interval