Fruit and coronary heart disease (CHD).

18 articles, providing information about 15 different cohorts were found.

Heart disease risk: Data about heart disease risk was provided by 8 cohorts, including a total of 3,914 cases.
Significant protective associations were found in 3 cohorts (10, 29), including 2,323 cases. No associations were found in the remaining 5 cohorts (3, 4, 13, 18, 20).

Note: In 2007, He FJ. publised a meta-analysis of 9 cohort studies relating fruit to CHD risk. This analysis excluded data from "The Shibata Study" (Tanaka H. 1987), and "The Study Of Men Born In 1913" (Strandhagen E. 2000), but it included data from 3 other cohorts which are not added to the following table. Excluded articles & motivations for exclusion are as follows:

  • Knekt P (1996). Provided information about CHD mortality instead of risk. In addition, it provided information about fruit other than apples & berries, instead of total fruit. Information about this variable is added to the category "uncategorized" in the menu.
    A protective effect among women, but not men was found of this subgroup of fruits.
  • Mann JI (1997). Provided information about CHD mortality instead of risk. Therefore, information about this variable was added to the table of fruit in relation to CHD death.
  • Liu S (2001). No information about fruit is published in the article referred to by the meta-analysis. It should be noted that He FJ. probably had access to information about this cohort which is not yet published.

Heart disease mortality: Data about heart disease death was provided by 10 cohorts, including a total of 2,983 cases.
Significant protective effects were found in one cohort (18), and in another cohort among women only (12) including a total of 484 cases. In addition, a nonsignificant trend of a protective effect was found in one cohort among women only (7). No other associations were found (4, 11, 13, 15, 17, 30, 31).

Conclusion: Significant protective associations against CHD risk were found in 2 cohorts of moderate-large size, and one additional cohort including 59% of all cases. Total fruit possibly protects against CHD risk. No level of consumption could be defined for this effect. Significant protective effects agains CHD death were found in one cohort of very small size, and in one cohort of small size among women only. No evidence was found for an association between total fruit and CHD death.