Although mortality rates were almost identical , blacks had an increased prevalence of angina , worse quality of life according to the Seattle Angina questionnaire, and poorer physical function based on the Short Form-12 Physical Component score. After adjusting for medical center treatments and other elements, the differences in quality of life and physical function remained significant statistically, and there was a trend toward even more angina among black patients. Dr. Spertus said this study found racial differences which were not seen in previous studies because it looked beyond just the overall survival rates. There have been dozens of research looking at survival outcomes of whites and blacks and essentially all show no distinctions; despite a well-documented difference in the usage of angiography, angioplasty, stents and bypass surgery.A grade 3 or higher elevation of total bilirubin level, regardless of attribution, occurred in 3 percent of the sufferers, and a grade 3 or more elevation of alkaline phosphatase level occurred in 6 percent. The rates of quality 1 or 2 2 increases in levels of total bilirubin, alkaline phosphatase, aspartate aminotransferase, and alanine aminotransferase that occurred during the treatment period, irrespective of attribution, had been 45 percent, 52 percent, 58 percent and 27 percent, respectively.