Figure 1

The geometric means (GMs) and 95% confidence intervals of urinary mercury levels (µg/L) by participant’s characteristics. Urinary cotinine levels were classified as low (< 0.1 µg/L) or high (≥ 0.1 µg/L) levels23. Urinary creatinine levels were classified based on the median. Red asterisks (*) indicate significant differences between the groups (p < 0.05).