That brings to mind two problems. Normal ranges only encompass the 95% confidence limits, such that 5% of the time perfectly healthy normal folks will have an abnormal lab result.

I brought his chart up on the computer screen, and sure enough, there it was: a serum potassium level slightly above the "reference," or normal, range—with a menacing "H" (for "high") next to it.

Checking your blood pressure at home or a local pharmacy can be an effective way to stay proactive about your heart health. However, when you're not receiving readings in the presence of a doctor ...

Age-Based Pediatric Growth Reference ChartsThe BP reference data include the 50th, 90th, 95th, and 99th percentiles for age and height for both boys and girls. So the graphs on this page show the ...