Table 3. Distribution of body mass index, diastolic blood pressure, concentrations of minerals, and serum concentrations of biochemical parameters across cases and controls.

†Mann-Whitney test for independent samples

Variables	Cases	Cases median (interquartile range)	Controls	Controls median (interquartile range)	P value
Body mass index	23.6	20.3-26.0	23.9	20.7-27.1	0.79
Diastolic blood pressure	77.0	67.7-86.0	78.0	71.0-85.5	0.59
Serum uric acid	6.0	5.2-6.9	5.9	5.2-6.4	0.79
Serum arsenic	0.89	0.37-1.24	0.31	0.14-0.80	0.03†
Serum lead	2.01	0.4-3.3	0.39	0.1-0.7	0.005†
Serum chromium	0.46	0.2-0.8	0.29	0.2-0.6	0.43
Serum cadmium	0.53	0.1-1.2	0.19	0.1-0.4	0.19
Blood urea	28.0	21.5-32.5	28.0	21.0-32.5	0.79
Serum creatinine	0.8	0.7-1.1	0.8	0.5-0.9	0.79
Serum calcium	8.5	7.5-1.1	8.8	8.1-9.3	0.79
Serum phosphate	3.6	3.1-4.2	3.5	3.2-3.9	0.79