Fig. 4From: Fetal growth outcomes following peri-implantation exposure of Long-Evans rats to noise and ozone differ by sexRelationship between acute ventilatory distress on gestation day 6 and fetal weight at gestation day 21. Chi-squared (Χ2) analysis was used to test relationships between Penh, measured by whole body plethysmography following the ozone exposure on gestation day 6, and fetal weight in males (a) and females (b) measured on gestation day 21. Group criteria was set based off a 0.75 threshold for Penh and median birth weight from the air + quiet, control group. The strength of the association was tested by relative risk (RR) and is presented alongside the 95% confidence intervalBack to article page