Modelling cost-effectiveness of different vasectomy methods in India, Kenya, and Mexico

Table 1 Effectiveness data for all age groups (effectiveness range)

Method	Proportion Oligospermic at 12 Weeks	Proportion Oligospermic at 24 Weeks	Proportion Virile at 24 weeks
L and E*	0.82 (0.78 – 0.86)	0.873 (0.84 – 0.91)	0.127 (0.9 – 0.16)
L and E with FI*	0.91 (0.88 – 0.94)	0.952 (0.926 – 0.97)	0.048 (0.03 – 0.074)
Cautery^γ	0.964 (0.94 – 0.981)	0.99 (0.977 – 0.998)	0.01 (0.002 – 0.023)
Cautery with FI^ψ	0.97 (0.947 – 0.984)	0.995 (0.982 – 0.999)	0.005 (0.001 – 0.018)

* Based on data from Sokal D, Irsula B, Hays M, Chen-Mok M, Barone MA: Vasectomy by ligation and excision, with or without fascial interposition: a randomized controlled trial [ISRCTN77781689]. BMC Medicine 2004, 2:6.
^γ Based on data from Barone MA, Irsula B, Chen-Mok M, Sokal DC: Effectiveness of vasectomy using cautery. BMC Urology 2004, 4:10 and Sokal D, Irsula B, Chen-Mok M, Labrecque M, Barone MA: A comparison of vas occlusion techniques: cautery more effective than ligation and excision with fascial interposition. BMC Urology 2004, 4:12.
^ψ Based on estimation from above studies using a binomial distribution as the confidence interval.

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