An audit of bone densitometry practice with reference to ISCD, IOF and NOF guidelines
1Rheumatology Department, Hôtel-Dieu Hospital, St. Joseph University, Beirut, Lebanon. rbaddoura@usj.edu.lb
Summary
Osteoporosis guidelines from NOF, IOF, and ISCD may improve the accuracy of bone density tests. These guidelines potentially increase the positive predictive value (PPV) for osteoporosis diagnosis compared to clinical judgment alone.
Area of Science:
- Osteoporosis research
- Clinical practice guidelines
- Diagnostic accuracy
Background:
- The clinical utility of osteoporosis guidelines in practice remains under-evaluated.
- Assessing the impact of established guidelines on diagnostic outcomes is crucial for evidence-based medicine.
Purpose of the Study:
- To evaluate the positive predictive value (PPV) of osteoporosis guidelines from the National Osteoporosis Foundation (NOF), International Osteoporosis Foundation (IOF), and International Society for Clinical Densitometry (ISCD).
- To compare the PPV of these guidelines against clinical judgment alone in diagnosing osteoporosis.
Main Methods:
- A cohort of 307 post-menopausal women undergoing bone mineral density (BMD) testing were analyzed.
- T-scores were calculated using NHANES (hip) and manufacturer (spine) databases.
- Osteoporosis was defined as a T-score ≤ -2.5 at the hip or spine.
Main Results:
- Clinical judgment alone yielded a PPV of 42.4% for osteoporosis.
- Applying NOF, IOF, or ISCD guidelines resulted in a PPV of 46.2% and 47.1%, respectively.
- These guidelines identified a similar number of women (236) for testing.
Conclusions:
- The ISCD, IOF, and NOF guidelines demonstrate potential to enhance the predictive value of central dual-energy X-ray absorptiometry (DXA) for osteoporosis.
- Implementation of these guidelines may lead to more accurate osteoporosis diagnosis in clinical practice.
