Determination of vitamin D and analysis of risk factors for osteoporosis in patients with chronic pain.

Background: Vitamin D deficiency is common in patients with chronic pain and healthy people, but the difference between the two has not been reported; thus, whether there is a relationship between vitamin D deficiency and chronic pain remains to be confirmed. Osteoporosis is a common disease in chronic pain disorders. Understanding the relationship between vitamin D and osteoporosis will provide a basis for the rational supplementation of vitamin D to prevent osteoporosis, and to understand the risk factors of bone mass change to provide a new treatment plan for early prevention of osteoporosis.