Table 1:

Results for dark triad traits in 159 participants from the general population and 248 health care professionals

TraitGroup; mean score (95% confidence interval)
General populationHealth care
Narcissism*15.9 (14.8–16.0)12.0 (11.3–12.7)
Machiavellianism56.6 (55.6–58.2)53.0 (51.9–54.1)
Psychopathy52.6 (51.2–54.0)44.7 (43.8–45.6)
 Primary33.4 (32.6–34.2)26.4 (25.7–27.1)
 Secondary19.1 (18.4–19.8)18.4 (18.0–18.8)
  • * Narcissistic Personality Inventory: (7) scored 0–40. The higher the score, the higher the level of narcissism.

  • MACH-IV: (12) scored 20–100. The higher the score, the higher the level of Machiavellianism.

  • Levenson Self-Report Psychopathy Scale: (13) scored 26–104. The higher the score, the higher the level of psychopathy.