2.7 Statistical methodology.
Data were presented as mean values with standard error of mean, or median with interquartile ranges for non-Gaussian data. Unless otherwise stated, one way ANOVA was utilized to assess the differences in distribution among groups with quantitative dependent variables and the Chi-square test for categorical variables. Differences in platelet anti-aggregatory responses to SNP between control subjects and patients were evaluated using ANOVA followed by Bonferroni test, and the measured differences within the patients’ blood/plasma samples during acute and chronic or acute and post-NAC phases were assessed by Student’s paired t-test. Data comparisons for SD-1 concentrations (acute, with/without NTG/NAC therapy and chronic) and control subjects also utilized ANOVA with post-hoc specific comparisons (Bonferroni test) or Student’s paired t-test as appropriate. All tests were 2-tailed and data were expressed as mean ± SEM, unless otherwise stated; p values ≤ 0.05 were considered statistically significant. Data analyses were performed using SPSS 23 version software.