Characteristics of the individuals involved in the measurement of poly(ADP-ribose) polymerase (PARP)-1 mRNA expression in peripheral blood mononuclear cells.

Data are presented as mean ± SEM or n (%). *To test the equality of the data across the study groups, Kruskal-Wallis test and Pearson’s chi-square test was applied for numeric and nominal variables, respectively; in case of smoking-related variables, non-smoking controls were omitted from the analysis.