Fig. 2

Distribution of ƩPBDEs and ƩPCBs concentrations in feline samples and the odds ratios of feline hyperthyroidism associated with a 100 ng/g lipid increase in ƩPBDEs and ƩPCBs. a Box and whiskers diagrams of the ƩPBDEs and ƩPCBs concentrations shows the distribution of measured concentrations (ng/g lipid) for control (white boxes) and hyperthyroid (gray boxes) feline samples. Only congeners with a detection frequency (DFR) greater than 40% were included in the sum value. The upper and lower boundaries of the boxes represent the 75th and 25th percentiles, respectively, and the line within the boxes denotes the median value. The upper whiskers show the 90th and the lower whiskers the 10th percentile. b Odds ratios were determined by logistic regression analysis of the relationship between ƩPBDEs and ƩPCBs and feline hyperthyroidism, controlling for age of feline study participants. Error bars represent the 95% confidence interval. An odds ratio that is significantly greater than one indicates that an increase in the serum concentration of the specific congener is associated with increased odds of having feline hyperthyroidism. *p ≤ 0.05 in exact logistic regression controlling for age of feline study participants