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Effect of calcium or vitamin D supplementation on vascular outcomes: a meta-analysis of randomized controlled trials
Pei-Juan Mao1, Chi Zhang, Lan Tang
1Department of VIP Special Clinic, Shanghai Seventh People's Hospital, Shanghai, China.
Insights
Calcium and vitamin D supplements do not significantly impact major vascular events in older adults. However, calcium supplementation alone may increase risks for cardiovascular events, myocardial infarction, and stroke.
Area of Science:
- Cardiovascular Health
- Nutritional Science
- Geriatrics
Background:
- The impact of calcium or vitamin D supplementation on serious vascular outcomes in older adults is not well-established.
- A meta-analysis of randomized controlled trials was conducted to address this uncertainty.
Purpose of the Study:
- To evaluate the effect of calcium or vitamin D supplementation on the risk of major cardiovascular outcomes.
- To analyze potential differences in effects between calcium and vitamin D, and by sex.
Main Methods:
- Systematic electronic searches of PubMed, Embase, and Cochrane Library for relevant randomized controlled trials.
- Meta-analysis using a random-effect model to calculate odds ratios (ORs) for vascular outcomes.
Main Results:
- Eleven trials involving 50,252 individuals were included, reporting 2685 major cardiovascular events.
- Neither calcium nor vitamin D supplementation showed a significant effect on major cardiovascular events, myocardial infarction, or stroke compared to placebo.
- Subgroup analysis suggested a potential, though not statistically significant, increased risk with calcium alone, particularly in males.
Conclusions:
- Calcium or vitamin D supplementation does not appear to increase the risk of major vascular events in older adults.
- Calcium supplementation alone may be associated with an increased risk of cardiovascular events, myocardial infarction, and stroke.
Background:
Whether calcium or vitamin D supplementation reduces serious vascular outcomes in older people remains unclear. We conducted a meta-analysis based on randomized controlled trials to evaluate the effect of calcium or vitamin D supplementation on the risk of major cardiovascular outcomes.
Methods:
We performed electronic searches in PubMed, Embase, and the Cochrane Library to identify relevant randomized controlled trials. Odds ratios (ORs) were used to measure the effect of calcium or vitamin D supplementation on the risk of major vascular outcomes with a random-effect model.
Results:
Of the 1643 identified studies, we included 11 trials reporting data on 50,252 individuals. These studies reported 2685 major cardiovascular events, 1097 events of myocardial infarction, and 1350 events of stroke. Calcium or vitamin D supplementation did not have an effect on major cardiovascular events (OR, 1.03; 95% confidence interval [CI]: 0.94-1.12; P=0.54), myocardial infarction (OR, 1.08; 95% CI: 0.96-1.22; P=0.21), or stroke (OR, 1.01; 95% CI: 0.91-1.13; P=0.80) when compared to the effect with a placebo. Subgroup analysis indicated that calcium supplementation alone might play an important role in increasing the risk of major cardiovascular events, myocardial infarction, and stroke, but this difference could not be identified as statistically significant. Furthermore, males seem to experience more harmful effects with supplements of calcium or vitamin D than the effects experienced by females.
Conclusions:
Calcium supplementation might increase the risk of major cardiovascular events, myocardial infarction, and stroke compared to the risk with a placebo.
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