Furthermore, among 27,685 subjects (25–87 years) participating in Tromsø 4 (1994–1995) and 8547 individuals participating in Tromsø 5 (2001–2002) surveys, where total calcium and PTH were measured, 712 cases of venous thromboembolism (VTE) were documented during a median follow-up of 15 years. This evidence concerns the gene PTH and venous thromboembolism.