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The objective of this study was to explore the factors associated symptoms of depression among pregnant women with gestational diabetes mellitus (GDM) in Japan. This cross-sectional study was conducted at a hospital in Toyota, Japan, from January 2015 to June 2016. Pregnant women who visited the hospital and were diagnosed with GDM in the second trimester were enrolled. We analyzed depression symptoms using the Centers for Epidemiological Studies Depression Scale (CES-D) and considered related factors of depression symptoms, such as dietary intake and daily walking. Dietary intake during the past month was assessed using a brief self-administered diet history questionnaire, and daily walking was assessed using an accelerometer. The prevalence rate for GDM was 8.8%, and 25 pregnant women with GDM were analyzed. The CES-D was not significantly correlated with pre-pregnancy BMI, postprandial plasma glucose, hemoglobin A1c, and the number of steps walked. In contrast, a significant negative correlation was observed between the CES-D score and intake of fish with bones, simmered fish, pickles, green leaves, mushrooms, and green tea. Furthermore, a significant positive correlation was found between Coke® and CES-D scores. For nutrient intake, a significant negative correlation was found between the CES-D score and vitamin K, folate, and β-carotene levels. The present study suggests that depression symptoms among pregnant women with GDM in the second trimester may be associated with diet.

AIM This study evaluated the usefulness of daily walking for gestational diabetes mellitus (GDM) management by analyzing the relationship between daily walking and glucose tolerance in pregnant women with GDM who were in the second trimester. METHODS This longitudinal study was conducted at TOYOTA Memorial Hospital in Toyota, Japan, from January 2015 to June 2016. Pregnant women with GDM wore accelerometers on the waist for 7-12 weeks. RESULTS Seventy-three women with GDM were included in the present study; data collected from 24 women were analyzed. The estimated number of steps walked daily showed a significant positive correlation (r = 0.798, P = 0.000) with energy expenditure related to physical activity. There was a significant negative correlation (r = -0.603, P = 0.014) between the post- to pre-research casual glucose level (CGL) ratio and the number of steps walked daily. No significant correlation (r = -0.004, P = 0.986) was detected between the ratio of hemoglobin A1c and the number of steps taken. When the study was completed, the 11 participants who walked ≥6000 steps/day showed significantly lower CGL (95 + 10 mg/dL [mean + SD]) than the 13 participants in the