[Smoking and its association to heart ischemic disease].

Objective: To assess the impact of cigarette smoking on coronary heart disease (CHD) and to propose a simple and efficient method to estimate its attributable fraction (AF).

Material And Methods: A matched case-control study was conducted in the Regional Hospital of Instituto Mexicano del Seguro Social (Mexican Institute of Social Security) in Morelos State, Mexico, from May to June-2000. Cases were 80 prevalent and incident patients with CHD.