Appendix 1—figure 4. Comparison of mitochondrial DNA copy number (mtDNAcn) values among the four distinct personality types created from the vulnerability facet of Neuroticism and self-discipline facet of Conscientiousness.

Panel (A) is Baltimore Longitudinal Study of Aging (BLSA) cohort, and panel (B) is SardiNIA cohort. The personality type with lowest mortality risk (low vulnerability high self-discipline [LVHD]) has a significantly higher mean mtDNAcn value than the highest mortality risk type (high vulnerability low self-discipline [HVLD]).