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Factors associated with hyperhomocysteinaemia in Mexican patients with rheumatoid arthritis
M A Lopez-Olivo1, L Gonzalez-Lopez, A Garcia-Gonzalez
1Department of Internal Medicine, Rheumatology, Hospital General Regional 110, Instituto Mexicano del Seguro Social (IMSS), Guadalajara, Mexico.
Insights
Mexican rheumatoid arthritis patients have a high prevalence of hyperhomocysteinemia, a risk factor for atherosclerosis. Male gender and advanced radiological damage are key associated factors, necessitating earlier evaluation and treatment.
Area of Science:
- Rheumatology
- Cardiovascular Risk Factors
- Clinical Biochemistry
Background:
- Hyperhomocysteinemia is a known risk factor for atherosclerosis, particularly in rheumatoid arthritis (RA).
- While Hispanics with RA have high coronary disease rates, data on homocysteine levels in Mexican RA patients is lacking.
- This study addresses the prevalence and associated factors of elevated homocysteine in this specific population.
Purpose of the Study:
- To determine the prevalence of hyperhomocysteinemia in Mexican patients with rheumatoid arthritis.
- To identify clinical, functional, and laboratory characteristics associated with hyperhomocysteinemia in this cohort.
Main Methods:
- A case-control study comparing 152 RA patients with 153 controls.
- RA patients were assessed for disease activity, function, comorbidity, and radiological damage.
- Laboratory tests included total serum homocysteine (tHcy), inflammatory markers (ESR, CRP), rheumatoid factor (RF), and lipid profile.
Main Results:
- The prevalence of hyperhomocysteinemia (>15 micromol/L) was significantly higher in RA patients (20%) compared to controls (6%).
- Elevated homocysteine levels in RA were associated with male gender, impaired global functional status, higher radiological damage, and elevated CRP.
- Multivariate analysis identified male gender (OR=4.2) and severe radiological damage (OR=3.4) as independent risk factors for hyperhomocysteinemia.
Conclusions:
- A high prevalence of hyperhomocysteinemia exists in Mexican patients with rheumatoid arthritis.
- This finding highlights the need for increased attention to evaluating and managing this coronary risk factor in RA patients.
- Earlier intervention strategies are crucial to mitigate cardiovascular risks associated with hyperhomocysteinemia in RA.
Background:
Hyperhomocysteinaemia is a factor related to the development of atherosclerosis in rheumatoid arthritis (RA). However, Hispanics with RA develop high rates of coronary disease; there are no studies about the frequency and factors related to high levels of homocysteine in Mexican patients.
Objective:
To evaluate the prevalence and characteristics associated with hyperhomocysteinaemia in Mexican patients with RA.
Methods:
One hundred and fifty-two patients with RA were compared with 153 controls. The assessment in RA included clinical characteristics, disease activity (RADAR), functioning (HAQ-Di and global functional status), comorbidity, and radiological damage. Laboratory determinations included total serum homocysteine (tHcy), erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), rheumatoid factor (RF), and lipid profile.
Results:
Median levels of homocysteine were higher in RA compared with controls (11.3 vs. 9.3, p<0.001). Twenty per cent of the patients with RA had hyperhomocysteinaemia (>15 micromol/L) compared with 6% in controls (p<0.001). There was statistical association between hyperhomocysteinaemia in RA with male gender (p<0.001), impairment in the global functional status (p = 0.004), higher radiological damage (p = 0.001), and CRP (p = 0.04). There was no association with RADAR, HAQ-Di, or RF, methotrexate dose or duration of use. In the adjusted multivariate model, the two variables associated with higher risk for hyperhomocysteinaemia were male gender (OR = 4.2, 95% CI 2 to 12, p = 0.006) and higher radiological damage (III-IV) (OR = 3.4, 95% CI 1.3 to 9, p = 0.01).
Conclusions:
Our data show a high prevalence of hyperhomocysteinaemia in Mexican patients with RA. More effort is required to evaluate and treat earlier this coronary risk factor.
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