Neuroticism scores range between 0 and 24, with higher scores indicating more severe neuroticism. See Figure 3 for the distribution of EPQ-N in our study. The overall mean score was 9.33 (SD 5.61), but there was a highly-significant sex difference (males: mean 8.17, median 7, SD 5.50; females: mean 10.26, median 10, SD 5.53; Mann-Whitney test p<10−16). There was no correlation between age and EPQ-N (r = −0.02, p = 0.26).
