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Vasectomy failures based on semen analysis, by treatment and age group
| 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) |
CI: Confidence interval
