A study was conducted investigating the relationship between coffee drinking and coronary heart disease (CH D). The following results were obtained: Variable b p-value Odds Ratio Coffee 0.787 0.019 2.20 It was thought that smoking might effect this relationship. The following results were obtained Variable b pvalue Odds Ratio Coffee 0.527 0.137 1.69 Smoking 1.102 0.002 3.01 Did smoking effect the relationship between coffee and CH D