borderline significancep = 0.055
In the middle-income group (1.3 ≤ PIR < 3.49), cadmium (OR = 1.32) had the strongest association, followed by lead (OR = 1.12, p = 0.042); mercury showed a borderline significance ( p = 0.055).
In the middle-income group (1.3 ≤ PIR < 3.49), cadmium (OR = 1.32) had the strongest association, followed by lead (OR = 1.12, p = 0.042); mercury showed a borderline significance ( p = 0.055).