Zhongguo quanke yixue (Oct 2022)
Characteristic of Biochemical Markers of Bone Turnover in Female Patients with Osteitis Condensans Ilii
Abstract
Background It is sometimes difficult to distinguish osteitis condensans ilii (OCI) from other diseases, and exploring biochemical markers of bone turnover may contribute to the differential diagnosis. Objective To evaluate the characteristic and significance of biochemical markers of bone turnover in patients with OCI. Methods Participants were retrospectively selected from Beijing Jishuitan Hospital from June 2013 to February 2022, including 61 female outpatients and inpatients with OCI {observation group: 15-50 years old〔mean age of (33.8±6.6) years〕, duration of OCI of two weeks to 15 years}, and 61 healthy female physical examinees{control group: 15-48 years old〔mean age of (35.6±7.6) years〕}. The clinical data and biochemical markers of bone turnover were compared between the two groups. The correlations of biochemical markers of bone turnover with OCI-related indices were analyzed. Results The serum albumin of the observation group was significantly lower than that of the control group〔 (45.4±2.9) g/L vs (46.5±2.8) g/L〕 (t=2.190, P<0.05) . In terms of biochemical markers of bone turnover, the observation group had significantly lower serum β-isomerised carboxy-terminal cross-linking telopeptide of type 1 collagen (β-CTX) 〔0.28 (0.23, 0.37) μg/L vs 0.36 (0.29, 0.48) μg/L〕, N-terminal osteocalcin (OC) 〔13.1 (11.2, 16.2) μg/L vs 15.6 (13.7, 17.3) μg/L〕, and 25- (OH) VD3 〔 (14.1±5.1) μg/L vs (17.5±6.6) μg/L〕 than the control group (Z=-2.983, -3.255, t=3.081, P<0.05) . OCI patients with a longer disease duration had significantly higher serum OC〔14.6 (12.4, 18.5) μg/L vs 11.7 (10.2, 14.0) μg/L〕 than those with a shorter duration (Z=-2.407, P<0.05) . OCI patients with two or more pregnancies had significantly lower serum β-CTX〔0.25 (0.22, 0.32) μg/L vs 0.33 (0.26, 0.44) μg/L〕 and OC〔12.2 (10.3, 15.0) μg/L vs 13.4 (12.0, 18.8) μg/L〕 than those with no or one pregnancy (Z=-2.486, -1.897, P<0.05) . Correlation analysis showed that, in OCI patients, the procollagen type 1 N-terminal propeptide (tP1NP) was negatively correlated with the number of pregnancies and deliveries (rs=-0.276, -0.298, P<0.05) . Serum OC level was negatively correlated with BMI, VAS score and the number of pregnancies (rs=-0.284, -0.374, -0.360, P<0.05) . The serum 25- (OH) VD3 level was positively correlated with BMI (rs=0.275, P<0.05) . Conclusion The serum levels of OC and β-CTX in female patients with OCI were significantly lowered, which could be used for distinguishing OCI and other diseases. The serum level of OC may be a predictor of the severity of OCI, which was related to the number of pregnancies. The level of tP1NP was related to the number of pregnancies and deliveries.
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