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The association between gravidity and primary biliary cirrhosis
Arti Parikh-Patel1, Ellen Gold, Jessica Utts
1Department of Statistics and Epidemiology, University of California at Davis, Davis, CA 95616, USA.
Annals of Epidemiology
|May 4, 2002
Summary
Reproductive factors like increased pregnancies are linked to primary biliary cirrhosis (PBC), an autoimmune liver disease predominantly affecting women. Higher gravidity, especially without a family history of autoimmune conditions, may increase PBC risk.
Area of Science:
- Hepatology
- Autoimmune Diseases
- Reproductive Epidemiology
Background:
- Primary biliary cirrhosis (PBC) is a chronic autoimmune liver disease predominantly affecting women, often leading to liver failure.
- Understanding risk factors, particularly those related to reproduction, is crucial for managing PBC.
Purpose of the Study:
- To investigate potential reproductive risk factors associated with the development of primary biliary cirrhosis.
- To explore the relationship between pregnancy history and PBC incidence.
Main Methods:
- A case-control study comparing 182 patients with PBC and 225 age- and sex-matched controls.
- Utilized a survey instrument based on NHANES III questions to collect reproductive history data.
Main Results:
- Cases with PBC reported a significantly higher number of pregnancies compared to controls (p = 0.008).
- Increased gravidity showed an adjusted odds ratio of 1.40 per additional pregnancy in individuals without a personal or family history of autoimmune disease.
- Nulliparity was less frequent in PBC cases (16.0%) than in controls (24.4%).
Conclusions:
- Gravidity, or the number of pregnancies, is significantly associated with primary biliary cirrhosis.
- This association is particularly noteworthy given the strong female predominance of PBC.