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Association between P1NP value and increases in bone mineral density in patients with postmenopausal osteoporosis
Kyosuke Hattori1, Yasuhide Kanayama1
1Orthopedic Surgery and Rheumatology, Toyota Kosei Hospital, Toyota, Aichi, Japan.
Objectives:
The present study aimed to investigate the effectiveness of treatment with romosozumab for 1 year and association between bone turnover markers and changes in bone mineral density (BMD) in patients with postmenopausal osteoporosis.
Methods:
Participants were 53 treatment-naïve postmenopausal osteoporosis patients. Correlations of per cent changes (Δ) in lumbar (L) and total hip (TH) BMD 12 months after initiating romosozumab with baseline demographic factors and parameters of N-terminal propeptide of Type 1 collagen (P1NP) and tartrate-resistant acid phosphatase-5b at baseline and Months 1, 3, and 6 were assessed. Multiple regression analysis was performed on factors significantly correlated with ΔL-BMD and ΔTH-BMD at Month 12.
Results:
ΔL-BMD and ΔTH-BMD at Month 12 were 17.5% and 8.1%, respectively. Multiple regression analysis revealed that a high P1NP value at Month 3 predicted large increases in L-BMD and TH-BMD at Month 12. High total amount of P1NP values from baseline to Month 6 was associated with large increases in L-BMD and TH-BMD at Month 12 and was most strongly correlated with the P1NP value at Month 3.
Conclusions:
A high P1NP value at Month 3 predicted large increases in both L-BMD and TH-BMD at Month 12 in postmenopausal osteoporosis patients treated with romosozumab.
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