Green-yellow vegetables and cardiovascular disease.

Introduction: Hirayama T. (5) examined a large population in Japan, and provided information about a large variation of CVD endpoints. Interpretation of data from this cohort is very hard: Significant associations were found in both direction after adjustment for sex and age, but inclusion of other confounders in the model sometimes shows large changes in both directions, and no CI's or P-values were included.
Data about this cohort is added to table 2 for everyone to see, but only the effects on IHD and stroke are discussed.

CHD: Data about the relation with heart disease was provided by 2 cohorts. A significant protective effect against IHD mortality was found in one cohort of very large size, but this association did not remain when possible confounders were taken into account (Hirayama T [5]). A significant protective effect against heart disease mortality was found in the other cohort, which was of very small size (Sahyoun NR [11]).
Stroke: Data about the relation with stroke was provided by 2 cohorts. Different effects with differend cerebrovascular end points were found in one cohort of very large size (Hirayama T [5]). But a later publication about this cohort showed no effect on total stroke mortality after better adjustment for possible confounders (Kinjo Y [5]). Nonsignificant protective effects were found in the other cohort among both men and women (Sauvaget C [28]).

Conclusion: Some protective effects were found, but these were nonsignificant or restricted to findings from a cohort of very small size. No evidence was found for an association between green-yellow vegetables and any end point.