Pilar Navarro1, John Mehegan1, Celine M Murrin1, Cecily C Kelleher1, Catherine M Phillips2. 1. HRB Centre for Health and Diet Research, School of Public Health, Physiotherapy, and Sports Science, University College Dublin, Dublin, Ireland. 2. HRB Centre for Health and Diet Research, School of Public Health, Physiotherapy, and Sports Science, University College Dublin, Dublin, Ireland. catherine.phillips@ucd.ie.
Abstract
BACKGROUND/ OBJECTIVES: Maternal adherence to healthy lifestyle behaviors during pregnancy has been associated with reduced risk of obesity in the offspring. Our objective is to examine associations between a composite healthy lifestyle score (HLS) in expectant mothers and adverse offspring birth outcomes and childhood obesity. SUBJECTS/ METHODS: The Lifeways Study comprises 665 mother-child pairs. A composite HLS (scored 0-5) based on high dietary quality (top 40% of the Healthy Eating Index (HEI)-2015), moderate to vigorous physical activity (MVPA), healthy pre-pregnancy BMI (18.5-24.9 kg/m2), never smoker, and no/moderate alcohol intake was calculated. Birth outcomes were abstracted from hospital records. Offspring waist circumference (WC) and BMI was determined at age 5 and 9. Logistic regression tested HLS associations with offspring outcomes. RESULTS: Offspring birth weight, length, and head circumference were positively associated with the maternal HLS (p < 0.001), whereas child BMI and incidence of overweight/obesity at age 5 and 9 were negatively associated (p < 0.05). In multivariable models, a lower maternal HLS was associated with increased risk of low birth weight (LBW) (P trend = 0.04) and lower likelihood of macrosomia (P trend = 0.03). Examined individually, poor maternal dietary quality, smoking, and alcohol intake were associated with higher risk of LBW (p < 0.04). Likelihood of macrosomia and combined overweight/obesity at age 5 and 9 years were greater among mothers with a pre-pregnancy BMI in the range with obesity (p < 0.04). Smoking during pregnancy was also linked to greater risk of childhood overweight/obesity (OR:1.91, 95% CI:1.01-3.61, p = 0.04 at age 5 and OR: 2.14, 95% CI:1.01-4.11, p = 0.03 at age 9). CONCLUSIONS: Our findings suggest that maternal adherence to a healthy lifestyle during pregnancy, in particular having a good quality diet, not smoking, and no/low alcohol intake in combination with a healthy pre-pregnancy BMI, is associated with reduced risk of adverse offspring birth outcomes and childhood obesity.
BACKGROUND/ OBJECTIVES: Maternal adherence to healthy lifestyle behaviors during pregnancy has been associated with reduced risk of obesity in the offspring. Our objective is to examine associations between a composite healthy lifestyle score (HLS) in expectant mothers and adverse offspring birth outcomes and childhood obesity. SUBJECTS/ METHODS: The Lifeways Study comprises 665 mother-child pairs. A composite HLS (scored 0-5) based on high dietary quality (top 40% of the Healthy Eating Index (HEI)-2015), moderate to vigorous physical activity (MVPA), healthy pre-pregnancy BMI (18.5-24.9 kg/m2), never smoker, and no/moderate alcohol intake was calculated. Birth outcomes were abstracted from hospital records. Offspring waist circumference (WC) and BMI was determined at age 5 and 9. Logistic regression tested HLS associations with offspring outcomes. RESULTS: Offspring birth weight, length, and head circumference were positively associated with the maternal HLS (p < 0.001), whereas child BMI and incidence of overweight/obesity at age 5 and 9 were negatively associated (p < 0.05). In multivariable models, a lower maternal HLS was associated with increased risk of low birth weight (LBW) (P trend = 0.04) and lower likelihood of macrosomia (P trend = 0.03). Examined individually, poor maternal dietary quality, smoking, and alcohol intake were associated with higher risk of LBW (p < 0.04). Likelihood of macrosomia and combined overweight/obesity at age 5 and 9 years were greater among mothers with a pre-pregnancy BMI in the range with obesity (p < 0.04). Smoking during pregnancy was also linked to greater risk of childhood overweight/obesity (OR:1.91, 95% CI:1.01-3.61, p = 0.04 at age 5 and OR: 2.14, 95% CI:1.01-4.11, p = 0.03 at age 9). CONCLUSIONS: Our findings suggest that maternal adherence to a healthy lifestyle during pregnancy, in particular having a good quality diet, not smoking, and no/low alcohol intake in combination with a healthy pre-pregnancy BMI, is associated with reduced risk of adverse offspring birth outcomes and childhood obesity.
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