Cholesterol level in women Studies relating serum choles- terol level to coronary heart disease suggest that a risk fac- tor is the ratio x of the total amount C of cholesterol in the blood to the amount H of high-density lipoprotein choles- terol in the blood. For a female, the lifetime risk R of hav- ing a heart attack can be approximated by the formula R = 2.07 In x – 2.04 provided 0

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