Risk factors for osteoporotic fracture: 1. female; 2. older than 65 years; 3. slimmer BMI <20; 4. family history of osteoporosis; 5. hypogonadism (estrogen or androgen deficiency); 6. sedentary lifestyle; 7. smoking; 8. excessive alcohol consumption; 9. inadequate calcium and vitamin D intake; 10. prone to falls.