PTH and osteoporosis: After adjusting for age, BMI, free thyroxine, 25(OH)D, PTH, smoking, drinking, and the period of menopause, women in the lower TSH tertile had a significantly greater risk of osteoporosis compared with the upper TSH tertile group (OR 1.86, 95% confidence interval [CI] 1.22-2.83, p < 0.01).