Is white rice consumption a risk for metabolic and cardiovascular outcomes? A systematic review and meta-analysis.

2017-08
Heart Asia 9(2)
- Chayakrit Krittanawong
- Anusith Tunhasiriwet
- HongJu Zhang
- Larry J Prokop
- Sakkarin Chirapongsathorn
- Tao Sun
- Zhen Wang

PubMed: 29467837
DOI: 10.1136/heartasia-2017-010909

Study Design

Type: Meta-Analysis
Sample size: n = 59
Methods: Comprehensive search of Medline, Embase, Scopus, and the Cochrane Central Register of Controlled Trials from database inception through March 2016; DerSimonian and Laird random effects models

Objective

The main objective of this systematic review and meta-analysis was to investigate the association between white rice consumption and risk of metabolic and cardiovascular outcomes.

Methods

We conducted a comprehensive search of Medline, Embase, Scopus, and the Cochrane Central Register of Controlled Trials from database inception through March 2016. Original studies that reported associations between white rice consumption and cardiovascular outcomes regardless of study design were selected. We extracted study characteristics and outcome data. Conflicts were resolved through consensus. Using the DerSimonian and Laird random effects models, we calculated pooled relative risks with 95% CI.

Results

Our search identified 721 citations. 18 studies were included with a total of 1 777 059 individuals: 14 348 had type 2 diabetes mellitus (T2DM); 5612 had metabolic syndrome (MetS); 10 839 had coronary heart disease (CHD); and 11 698 had stroke. Compared with the lowest category, the highest category of white rice consumption was only associated with 30% higher risk of MetS (pooled OR 1.30, 95% CI 1.03 to 1.65; p<0.001; I²=65.5%).

Conclusions

Higher white rice consumption has not been shown to be associated with increased risk of CHD, stroke and T2DM. However, white rice consumption may be associated with increased risk of MetS in certain populations.

Research Insights

White Rice→Reduced Metabolic Syndrome Risk
Compared with the lowest category, the highest category of white rice consumption was only associated with 30% higher risk of MetS (pooled OR 1.30, 95% CI 1.03 to 1.65; p<0.001; I²=65.5%).
Effect
Harmful
Effect size
Moderate
White Rice→Reduced Risk of Coronary Heart Disease
Higher white rice consumption has not been shown to be associated with increased risk of CHD, stroke and T2DM.
Effect
Neutral
Effect size
Small
White Rice→Reduced Risk of Stroke
Higher white rice consumption has not been shown to be associated with increased risk of CHD, stroke and T2DM.
Effect
Neutral
Effect size
Small
White Rice→Reduced Type 2 Diabetes Mellitus Risk
Higher white rice consumption has not been shown to be associated with increased risk of CHD, stroke and T2DM.
Effect
Neutral
Effect size
Small