What is the difference between osteopenia and osteoporosis?

The primary difference between osteopenia and osteoporosis lies in the severity of bone density loss, which is measured using a T-score that compares an individual's bone mineral density to that of a healthy young adult.12

• Osteopenia: This condition is characterized by a reduced amount of bone tissue, representing a minor reduction in bone mass. It is clinically defined as having a T-score between −1.0 and −2.5.132
• Osteoporosis: This is a more severe condition involving a significant reduction in bone mass, which causes bones to become thin, porous, and fragile. It is defined by a T-score of −2.5 or lower. Because of this structural weakening, individuals with osteoporosis are at a much higher risk of sustaining fractures from minor stresses or trauma.1324

In the context of menopause, the decline in estrogen production accelerates bone loss, making postmenopausal women particularly susceptible to progressing from osteopenia to osteoporosis if the condition is not managed through lifestyle modifications or medical intervention.134