Hum. Reprod. Advance Access originally published online on June 24, 2008
Human Reproduction 2008 23(8):1840-1848; doi:10.1093/humrep/den237
Screening strategies for tubal factor subfertility
1 Research Institute Growth and Development (GROW), Department of Obstetrics and Gynaecology, Maastricht University Medical Centre, PO Box 5800, 6202 AZ Maastricht, The Netherlands 2 Department of Clinical Epidemiology and Medical Technology Assessment (KEMTA), Maastricht University Medical Centre, PO Box 5800, 6202 AZ Maastricht, The Netherlands 3 Care and Public Health Research Institute (CAPHRI), Department of Health Organization, Policy and Economics, Maastricht University, PO Box 616, 6200 MD Maastricht, The Netherlands 4 Present address: Department of Obstetrics and Gynaecology, University Medical Center Groningen, PO Box 30001, 9700 RB Groningen, The Netherlands
5 Correspondence address. E-mail: je_denhartog{at}hotmail.com
BACKGROUND: Different screening strategies exist to estimate the risk of tubal factor subfertility, preceding laparoscopy. Three screening strategies, comprising Chlamydia trachomatis IgG antibody testing (CAT), high-sensitivity C-reactive protein (hs-CRP) testing and hysterosalpingography (HSG), were explored using laparoscopy as reference standard and the occurrence of a spontaneous pregnancy as a surrogate marker for the absence of tubal pathology.
METHODS: In this observational study, 642 subfertile women, who underwent tubal testing, participated. Data on serological testing, HSG, laparoscopy and interval conception were collected. Multiple imputations were used to compensate for missing data.
RESULTS: Strategy A (HSG) has limited value in estimating the risk of tubal pathology. Strategy B (CAT
HSG) shows that CAT significantly discerns patients with a high versus low risk of tubal pathology, whereas HSG following CAT has no additional value. Strategy C (CAT
hs-CRP
HSG) demonstrates that hs-CRP may be valuable in CAT-positive patients only and HSG has no additional value.
CONCLUSIONS: CAT is proposed as first screening test for tubal factor subfertility. In CAT-negative women, HSG may be performed because of its high specificity and fertility-enhancing effect. In CAT-positive women, hs-CRP seems promising, whereas HSG has no additional value. The position and timing of laparoscopy deserves critical reappraisal.
Key words: Chlamydia trachomatis/hysterosalpingography/screening/serological test/tubal factor subfertility
Submitted on August 6, 2007; resubmitted on March 25, 2008; accepted on May 26, 2008.
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