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Dietary patterns associated with Stroke among West Africans: a case-control study.

BACKGROUND
The relationship of diet with stroke risk among Africans is not well understood.


AIM
To investigate the association between dietary patterns and stroke risk among West Africans.


METHODS
In this multi-centre case-control study, 3684 stroke patients matched (for age and sex) with 3684 healthy controls were recruited from Nigeria and Ghana. Food consumption was assessed using a food frequency questionnaire, and dietary patterns were summarized using principal component analysis. Stroke was defined using predefined criteria primarily on clinical evaluation following standard guidelines. Conditional logistic regression was applied to compute odds ratio (OR) and 95% confidence interval (CI) for stroke risk by tertiles of dietary patterns.


RESULTS
Overall, mean age was 59.0±13.9 years, and 3992(54.2%) were males. Seven dietary patterns were identified. Multivariable-adjusted OR (95%CI) for risk of stroke by second and third tertiles (using the lowest (first) tertile as reference) of dietary patterns were; 1.65 (1.43, 1.90) and 1.74 (1.51, 2.02) respectively for 'poultry product and organ meat'; 1.69 (1.47, 1.96 and, 1.51 (1.31, 1.75) for 'red meat'; 1.07 (0.92, 1.23) and 1.21 (1.04, 1.40) for 'fried foods and sweetened drinks'; 0.69 (0.60, 0.80) and 0.45 (0.39, 0.53) for 'vegetables'; 0.84 (0.72, 0.97) and 0.81 (0.70, 0.93) for 'whole-grain and fruit drinks'; and 0.97 (0.84, 1.12) and 0.85 (0.73, 0.98) for 'fruits' (P<0.05).


CONCLUSIONS
These data suggest that plant-based diets are associated with a lower risk of stroke and might be a beneficial dietary recommendation for the primary prevention of stroke among Africans.