Table 2

Personality traits (FPI-R), depression (D-S), and state of health (Bf-S) in six monozygotic (MZ) and nine dizygotic twin pairs discordant for idiopathic Parkinson’s disease and 17 healthy controls

MZ (n=12)DZ (n=18)Controls (n=17)p Value
FPI-R:
 Life satisfaction5.3 (2.7)5.7 (2.0)6.8 (1.5)0.12
 Social orientation5.1 (1.4)5.4 (1.7)5.8 (1.7)0.55
 Achievement orientation3.2 (1.5)1-150 1-151 5.1 (2.1)5.8 (1.5)0.003
 Inhibitedness5.3 (2.6)5.8 (2.6)1-150 3.8 (1.9)0.049
 Impulsiveness4.3 (1.8)4.8 (1.9)4.4 (1.5)0.58
 Aggressiveness3.7 (1.1)1-151 5.1 (2.0)5.0 (1.3)0.02
 Strain3.7 (1.5)1-151 5.2 (1.5)1-150 3.8 (1.3)0.005
 Somatic complaints5.1 (1.8)1-150 4.4 (1.8)3.0 (1.5)0.005
 Health concern4.1 (1.3)1-150 4.4 (1.7)1-150 6.1 (1.5)0.002
 Frankness3.8 (1.8)5.2 (1.9)1-150 3.9 (2.1)0.04
 Extraversion3.6 (2.0)1-150 4.5 (1.8)6.2 (2.2)0.006
 Emotionally4.8 (2.1)5.4 (1.5)1-150 3.4 (1.5)0.007
D-S:
 Depression11.2 (9.5)10.8 (6.4)1-150 4.9 (2.9)0.009
Bf-S:
 State of health17.3 (18.1)19.1 (11.4)1-150 7.5 (5.4)0.01
  • Values are means (SD).

  • 1-150 Significant differences between twins and controls.

  • 1-151 Significant differences between twin groups (Kruskal-Wallis ANOVA with post hoc Tukey-Kramer test).