Osteoporosis risk factors
| Major factors | Minor factors |
| Systemic corticosteroids for >3 months·year−1 | Body mass index <21 |
| Prior vertebral compression fracture | Active smoker |
| Chronic alcoholism | |
| Aged >65 years | |
| Hip fracture | |
| Rib fracture | |
| Menopause | |
| Sedentariness | |
| FEV1 <50% of theoretical value |
FEV1: forced expiratory volume in 1 s.