Dietary advice v control for mean percentage change in the blood total cholesterol concentration at up to 5 years follow up

Study groupWeighted mean reduction (95% CI)
AHA=American Heart Association.
*Heterogeneity existed among trials.
All studies*5.7% (5.2 to 6.3)
AHA step 1 diets3.0% (1.8 to 4.1)
AHA step 2 diets*5.6% (4.7 to 6.5)
Change in fat ratio diets*7.6% (6.2 to 9.0)
Reduction in total fat diets5.8% (3.8 to 7.8)