Παρασκευή 2 Ιουνίου 2017

Association of endometrial hyperplasia and cancer with a history of gestational diabetes

Abstract

Purpose

Excess circulating insulin may contribute to endometrial cancer (EC) development; studies suggest increased risk of EC associated with type 2 diabetes. We investigated whether gestational diabetes is associated with increased risk of EC and its precursor, endometrial hyperplasia (EH).

Methods

We conducted a population-based, case–control study of women in Washington State. Cases were women with a hospital discharge record indicating the presence of EH/EC who could be linked to a prior delivery hospitalization or birth record from 1987 to 2013 (n = 593). Controls were randomly selected from remaining deliveries, frequency matched 10:1 on delivery year and maternal age at delivery (n = 5,743). Logistic regression was used to estimate odds ratios (ORs) and 95% confidence intervals (CIs).

Results

After adjustment for race/ethnicity, maternal age at delivery, and delivery year, EH/EC was associated with a history of gestational diabetes (OR 1.73, 95% CI 1.27–2.35). This association was present for both EH and EC (OR 1.61, 95% CI 1.00–2.60 and OR 1.80, 95% CI 1.22–2.65, respectively). After adjustment for prepregnancy body mass index, the OR for EH/EC was attenuated and became statistically non-significant (OR 1.22, 95% CI 0.87–1.72), except in women <50 years old at the time of case ascertainment (OR 1.49, 95% CI 1.00–2.20). Associations were slightly stronger for EC than EH.

Conclusions

We observed an association between EH/EC and a history of gestational diabetes specific to younger women. Future studies focusing on the relationships between gestational diabetes, obesity, and EC, including age at diagnosis, are warranted.



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