A ‘Positive’ Test Result May Not Be Positive News If you are a man over 45 or a woman over 55 and you have heart disease or diabetes, your doctor will likely advise you to take steps to lower your LDL cholesterol if it is higher than 100 mg/dl. That being said, your age and other risk factors for heart disease may influence how your doctor reacts if your blood test shows a higher-than-optimal LDL cholesterol level. But for other tests, such as LDL cholesterol, a level less than 100 milligrams/deciliter (mg/dl) is considered optimal regardless of age. For children, for example, a hemoglobin level of about 11 to 13 grams/deciliter (g/dl) is normal, while for men, a value of about 14 to 17 g/dl is normal, and for women, 12 to 15 g/dl is normal. ‘Normal’ May or May Not Vary by Ageįor some tests, such as the hemoglobin test, normal results vary by age. For example, the normal reference range for the number of red blood cells in a complete blood count is between 5 million and 6 million cells per microliter for a man, but for women, it’s between 4 million and 5 million, according to the NHLBI. If you compare your blood test results with those of someone of the opposite sex, you may be surprised to find differences. ‘Normal’ May Differ Between Men and Women
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