OBJECTIVE: To examine the association of gestational weight gain and dietary factors with abnormal glucose tolerance (AGT). METHODS: We conducted a prospective cohort study among 813 Hispanic prenatal care patients in Massachusetts. Gestational weight gain and oral glucose tolerance test results were abstracted from medical records. Dietary intake was assessed using a semi-quantitative food frequency questionnaire. Target weight gain was based on BMI-specific weekly weight gain rates established by the Institute of Medicine (IOM). RESULTS: We observed a statistically significant interaction between prepregnancy BMI and weight gain in relation to AGT (P < 0.01). Class II/III (BMI > or = 35 kg/m2) obese women who had a high rate of weight gain (>0.30 kg/week) or who exceeded target weight were 3-4 times as likely to develop AGT compared to women who gained within IOM ranges (OR = 4.2, 95% CI 1.1-16.0, OR = 3.2 95% CI 1.0-10.5, respectively). Decreasing levels of saturated fatty acids and energy-dense snack foods and increasing levels of fiber and polyunsaturated:saturated fat ratio were significantly associated with decreased risk of AGT, independent of gestational weight gain [corrected]. CONCLUSIONS: Weight gain among class II/III obese women and certain dietary components may represent modifiable risk factors for AGT.
OBJECTIVE: To examine the association of gestational weight gain and dietary factors with abnormal glucose tolerance (AGT). METHODS: We conducted a prospective cohort study among 813 Hispanic prenatal care patients in Massachusetts. Gestational weight gain and oral glucose tolerance test results were abstracted from medical records. Dietary intake was assessed using a semi-quantitative food frequency questionnaire. Target weight gain was based on BMI-specific weekly weight gain rates established by the Institute of Medicine (IOM). RESULTS: We observed a statistically significant interaction between prepregnancy BMI and weight gain in relation to AGT (P < 0.01). Class II/III (BMI > or = 35 kg/m2) obesewomen who had a high rate of weight gain (>0.30 kg/week) or who exceeded target weight were 3-4 times as likely to develop AGT compared to women who gained within IOM ranges (OR = 4.2, 95% CI 1.1-16.0, OR = 3.2 95% CI 1.0-10.5, respectively). Decreasing levels of saturated fatty acids and energy-dense snack foods and increasing levels of fiber and polyunsaturated:saturated fat ratio were significantly associated with decreased risk of AGT, independent of gestational weight gain [corrected]. CONCLUSIONS:Weight gain among class II/III obesewomen and certain dietary components may represent modifiable risk factors for AGT.
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