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Toward standardization of the cut-off value for the direct immunobead test using the postcoital test in
Junko Koriyama1, Hiroaki Shibahara1, Tomoe Ikeda1
1Department of Obstetrics and Gynecology, School of Medicine, Center for Reproductive Medicine, Jichi Medical University Hospital Jichi Medical University 3311-1 Yakushiji 329-0498 Shimotsuke Tochigi Japan.
Purpose:
There is a need to improve our understanding of the cut-off value of the direct immunobead test (D-IBT).
Methods:
The subjects were 26 D-IBT-positive and 140 D-IBT-negative males. The results of post coital tests (PCTs) for each subject were examined.
Results:
A significant difference was observed in abnormal PCTs between values <20 % and those ≥20 % (P = 0.02). However, there was no significant difference in abnormal PCTs between values <50 % and those ≥50 % (P = 0.084).
Conclusions:
A cut-off value of 20 % was correlated with the possibility of conception on treatment with IUI. The D-IBT is a screening test, and the value of 20 % initially suggested by Bronson et al. seems to be more appropriate than that of 50 % in the criteria defined by the World Health Organization.
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