Abstract
Objective. To determine the relative importance of thyroid hormones and human chorionic gonadotropin in the etiology of hyperemesis gravidarum. Design. A prospective study comparing the hormonal status in women with hyperemesis gravidarum (5-18 weeks), with healthy pregnant controls, matched for gestational age. Sensitive thyroid stimulating hormone, free thyroxine, free triiodothyronine and total beta human chorionic gonadotropin were measured by immunoassays. The hormone results for hyperemesis gravidarum group ( n =58) were compared with pregnant control women ( n =58) using the Mann Whitney test. Stepwise logistic regression analysis was performed to determine which variables were significantly associated with hyperemesis gravidarum and to estimate the probability of each woman having hyperemesis gravidarum. The strength of the resulting association was tested by generating a receiver operating characteristic curve for predicting hyperemesis gravidarum using these probabilities. Results. Maternal age ...
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