Dose-response relationship between lower serum magnesium level and higher prevalence of knee chondrocalcinosis.

Abstract

BACKGROUND:

The aim was to assess serum magnesium levels in relation to prevalence of knee chondrocalcinosis in two population-based Chinese studies.

METHODS:

Data included in this analysis consisted of two population-based cross-sectional studies, i.e., the Xiangya Hospital Health Management Center Study and the Xiangya Osteoarthritis (XO) Study I. A bilateral knee anteroposterior radiograph was obtained from each subject. Radiographic knee chondrocalcinosis was present if there was definite linear cartilage calcification. Serum magnesium concentration was measured using the chemiluminescence method. We examined the relation of serum magnesium levels to prevalence of knee chondrocalcinosis using generalized estimating equations.

RESULTS:

The prevalence of knee chondrocalcinosis was 1.4% in the Xiangya Hospital Health Management Center Study (n = 12,631). Compared with the lowest tertile, the age, sex and body mass index (BMI)-adjusted odds ratios (ORs) of chondrocalcinosis were 0.59 (95% CI 0.40-0.87) and 0.49 (95% CI 0.33-0.72) in the second and the third tertiles of serum magnesium, respectively (P for trend <0.001). The prevalence of knee chondrocalcinosis in the XO Study I (n = 1316) was 4.1%. The age, sex and BMI-adjusted ORs of chondrocalcinosis were 0.67 (95% CI 0.34-1.30) in the second and 0.45 (95% CI 0.21-0.94) in the third tertile of serum magnesium when compared with the lowest tertile (P for trend = 0.030). Similar results were observed in men and women in both studies. Adjusting for additional potential confounders did not change the results materially.

CONCLUSIONS:

Subjects with lower levels of serum magnesium, even within the normal range, had higher prevalence of knee chondrocalcinosis in a dose-response relationship manner, suggesting that magnesium may have a preventive or therapeutic potential for knee chondrocalcinosis.

• Authors: Chao Zeng, Jie Wei, Robert Terkeltaub, Tuo Yang, Hyon K Choi, Yi-Lun Wang, Dong-Xing Xie, David J Hunter, Yuqing Zhang, Hui Li, Yang Cui, Liang-Jun Li, Guang-Hua Lei
• Journal: Arthritis research & therapy (Arthritis Res Ther) Vol. 19 Issue 1 Pg. 236 (Oct 24 2017) ISSN: 1478-6362 [Electronic] England
• PMID: 29065924 (Publication Type: Journal Article)

Chemical References

• Magnesium

Topics

• Adult
• Aged
• Asian People
• China (epidemiology)
• Chondrocalcinosis (blood, diagnostic imaging, ethnology)
• Cross-Sectional Studies
• Female
• Humans
• Knee Joint (diagnostic imaging, pathology)
• Magnesium (blood)
• Male
• Middle Aged
• Odds Ratio
• Osteoarthritis, Knee (blood, diagnostic imaging, ethnology)
• Prevalence
• Radiography