Demographic and clinical analysis of mtDNA content in prostate cancer among American men.

The mtDNA content is reported as mean, median, and standard deviation. Patient demographic and clinical variables (age, race, stage, Gleason sum, Gleason minor, Gleason major, and PSA) are reported as frequencies and relative frequencies. A QQ plot (not shown) was used to assess the normality of mtDNA and these values were determined to be non-normal, with no normalizing transformation available. The percentages for age to PSA are column percentages; the percentages are derived from the total number in the first row. The percentages in the first row are the only ones based on the sample size of 118.