PTH and diabetes mellitus: Furthermore, age (OR: 1.04, 95% CI 1.00–1.07, P = 0.030), diabetes (OR: 2.28, 95% CI 1.19–4.36, P = 0.013), coronary heart disease (OR: 2.77, 95% CI 1.27–6.05, P = 0.011), and serum Ca × P product (OR: 1.04, 95% CI 1.01–1.08, P = 0.025) and intact PTH levels (OR: 1.09, 95% CI 1.01–1.18, P = 0.024) were independently associated with MVC.