Adjusted odds ratio ± SE for hyperparathyroidism (HPT, defined as parathyroid hormone >70 pg/mL) by creatinine-corrected urinary concentrations of perchlorate, nitrate, and thiocyanate among the United States adults, NHANES 2005–2006.

<p>Primary HPT was arbitrarily defined as albumin-corrected total serum calcium ≥9.5 mg/dL, and secondary HPT was defined as corrected calcium <9.5 mg/dL. <b>A</b>, Odd ratios by urinary perchlorate quartiles. <b>B</b>, Odd ratios by urinary nitrate quartiles. <b>C</b>, Odd ratios by urinary thiocyanate quartiles. Adjusted for age, race/ethnicity, smoking status, body mass index, corrected total serum calcium, and 25-hydroxyvitamin D levels.