ĐẶC ĐIỂM MẬT ĐỘ XƯƠNG CẲNG TAY ĐO BẰNG PHƯƠNG PHÁP HẤP THỤ TIA X NĂNG LƯỢNG KÉP VÀ GIÁ TRỊ DỰ ĐOÁN LOÃNG XƯƠNG NGUYÊN PHÁT Ở PHỤ NỮ SAU MÃN KINH

Abstract

Objectives: To characterize bone mineral density at forearm measured by dualenergy X-ray absorptiometry and determine the predictive value of primary osteoporosis in postmenopausal women. Methods: Cross-sectional descriptive study was conducted on 166 postmenopausal women who came for examination and measured bone mineral density at the following locations: femoral neck non-dominant leg, lumbar spine, and bilateral forearms at the Medical Center. Department No. 1 Ton That Tung - Hanoi Medical University Hospital. Results: The average age of the study subjects is 62.76 ± 7.05 years old. The average age of menopause is 49.24 ± 3.59 years. The average bone mineral density at the UD, MID, 1/3 positions of the non-dominant forearm is 0.313 ± 0.054 g/cm2; 0.442 ± 0.067 g/cm2; 0.543 ± 0.075 g/cm2. The average difference in T-score between the non-dominant forearm and femoral neck is 0.457 ± 0.963 (95% CI = -1.431 – 2.344). The number of samples within the concordance range between the T-score index at the femoral neck and the 1/3 position of the non-dominant forearm is 161/166 = 97.0%; and the number of samples in the incompatibility range accounts is 5/166 = 3.0%. Conclusion: The average bone density at the UD, MID, 1/3 positions of the non-dominant forearm is 0.313 ± 0.054 g/cm2; 0.442 ± 0.067 g/cm2; 0.543 ± 0.075 g/cm2. There is a difference in average bone density between locations on the same forearm (p < 0.05). There is a difference in average bone density between the same position in the dominant and non-dominant forearms (p < 0.05). All positions of the forearm predict osteoporosis in femoral neck well with AUC > 0.7.