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Figure 1 Multivariate risk ratios for each of the four risk factors and age. The bars represent the upper and lower 95% confidence intervals. Ratios >1 indicate a positive association with SD. Abnormal exercise blood pressure pertains only to patients <40 years old. MLVWT = maximal left ventricular wall thickness; FH = family history of SD; Abn BP = abnormal exercise blood pressure response in patients <40 years old; RF = risk factors.