Independent and Joint Effects of Prenatal Incense-Burning Smoke Exposure and Children's Early Outdoor Activity on Preschoolers' Obesity.

However, when the pregnancy was divided into three trimesters, there was a nonsignificant trend for maternal exposure to IBS in specific trimesters (the 1st trimester: AOR = 1.14, 95% CI = 0.96~1.34; the 2nd trimester: AOR = 1.19, 95% CI = 0.94~1.51; the 3rd trimester: AOR = 0.84, 95% CI = 0.68~1.04) With regard to the frequency of IBS exposure during the different trimesters, after controlling for confounding factors, only maternal prenatal exposure to IBS ≥ 2 times/week in the 1st trimester (AOR = 1.31, 95% CI = 1.01~1.70) was significantly associated with an increased the risk of childhood obesity.

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