2.7. Intervention method
The control group will be given conventional medication and health education. The patients will be advised to take a calcium supplement, Calcium Carbonate and Vitamin D3 Granules (Beijing, China), which contains 500 mg of calcium and 200 IU of vitamin D in one sachet twice a day for 24 weeks. Health education includes informing patients about the dangers of OP, maintaining a good lifestyle and diet, and taking their medication on time.