Adult reference intervals for 12 chemistry analytes: influences of age and sex.

Blood samples were drawn from 123 "healthy" adults residing in the Salt Lake City, Utah metropolitan area. A sample of adults was identified using a random telephone method and respondents for the study were selected to represent the age and sex distribution of the population. Blood samples were drawn and analyzed for 12 blood analytes. The range of serum concentrations, mean values, median values, and standard deviations for each analyte are reported for males and females and for three age groups (25-44, 45-59, 60-70). Age differences existed for total cholesterol, triglycerides, and TIBC. Sex differences were found for HDL-cholesterol, copper, and vitamin C. Magnesium, LDL-cholesterol, and calcium had both age and sex differences. No age or sex differences were observed for iron, B-carotene, and zinc. A table of adult reference intervals reflecting these findings is presented.