2. Diagnostic performance of general dental practitioners after 1 hour of lecture for identifying postmenopausal women with low bone mineral density by panoramic radiographs

• Published in: Dental Radiology Vol. 45; no. 4; p. 160
• Main Authors: Sutthiprapaporn Pipop, 田口 明, 中元 崇, 大塚昌彦, 末井良和, 谷本啓二
• Format: Journal Article
• Language: Japanese
• Published: Japanese Society for Oral and Maxillofacial Radiology 2005
• ISSN: 0389-9705

【Objective】 Mandibular inferior cortical shape detected on panoramic radiographs may be useful for the identification of postmenopausal women with low bone mineral density(BMD). Diagnostic performance of general dental practitioners (GDPs) after the lecture about the reading of cortical shape is still unknown. The purposes of this study were to calculate the diagnostic performance of GDPs after the lecture about the reading of cortical shape and to evaluate the effect of GDPs' age and sex on diagnostic performance. 【Methods】 Of 249 GDPs who took one hour of lecture about the background and reading of cortical shape between 2004 and 2005, 111 GDPs were asked to classify mandibular cortical shape of panoramic radiographs obtained from 100 postmenopausal women who have taken BMD assessment by dual X-ray absorptiometry (DXA). Postmenopausal women were divided into 2 groups according to WHO classification; 42 normal women and 58 women with low BMD (osteopenia/osteoporosis). Each GDP classified cortical shape into 3 types according to the method of Klemetti et al. The effects of sex and age on diagnostic performance were analyzed by independent-sample T test or one-way ANO VA. 【Results】 Overall mean sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), accuracy and likelihood ratio for a positive risk result of 111 GDPs were 72.9% (95%CI; 71.2%-74.6%), 48.9% (95%CI; 46.4%-51.5%), 66.8% (95%CI; 65.9%-67.7%), 56.9% (95%CI; 55.7%-58.2%), 62.8% (95%CI; 62.0%-63.7%) and 1.51 (95%CI; 1.44-1.58), respectively. No significant differences in diagnostic performance between male and female GDPs and among age groups were found (P > 0.05). 【Conclusion】 Our results suggest that 72.9% of women with low BMD can be identified by GDPs who took one hour of lecture of cortical shape reading; however, the GDPs' diagnostic performance may not be influenced by age and sex.