The strongest evidence for the idea that coffee consumption is associated with increased risk of coronary heart disease comes from the case control studies. Such studies have a weaker design than cohort studies and suffer from bias introduced by the choice of controls and differential recall of food and beverage consumption over extended periods by cases and controls.
By contrast, the results of cohort studies do not support the idea that coffee consumption increases risk of coronary heart disease and one study even suggests that coffee consumption might protect against coronary heart disease. The single study showing an increased risk of coronary heart disease with coffee consumption was dismissed by the editor of the journal it was published in who is himself a well known epidemiologist (14).
Overall the evidence does not support the proposition that coffee consumption causes heart disease.
Hobart Burnie, Tasmania, Australia
Anchorage, Alaska, USA
Plano, Texas, USA
Adelaide, South Australia