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A cost-benefit of gnRH stimulation test in diagnosis of central precocious puberty (CPP).

Authors
Type
Published Article
Journal
Journal of the Medical Association of Thailand = Chotmaihet thangphaet
Publication Date
Volume
83
Issue
9
Pages
1105–1111
Identifiers
PMID: 11075980
Source
Medline
License
Unknown

Abstract

The GnRH stimulation test is the gold standard to diagnose central precocious puberty (CPP). Conventionally, we need at least 2 hours to finish the test which seems to be costly and time consuming. In this study, we described the pattern of LH and FSH levels during the GnRH test in 27 girls who presented with various degrees of precocious puberty. We found that the blood samples at 90 and 120 min after GnRH were not necessary. To save the cost of diagnosis, the basal LH/FSH ratio > 0.2, the 30 min LH/FSH ratio after GnRH > 0.9 and the peak LH/FSH ratio > 1.0 can be used to diagnose CPP with positive predictive values (PPV) of 87.3, 89.4 and 93.8 per cent respectively.

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