Table 2: Differences among patient groups on the SWAP-200 personality dimensions and psychological functioning while controlling for gender and age.

SWAP-200 PD scalesMOH group ()SUD group ()PD group ()F(2, 273)η2
MSDMSDMSD

Paranoid41.57a1.0550.72b1.0145.92c0.8314.290.10
Schizoid46.790.9647.880.9346.960.770.310.00
Schizotypal43.59a0.9550.97b0.9246.03c0.7512.100.08
Antisocial43.20a0.8653.56b0.8347.69c0.6827.670.17
Borderline38.71a1.1056.60b1.0747.52c0.8849.440.27
Histrionic42.11a1.0756.40b1.0350.03c0.8534.340.20
Narcissistic43.00a0.9553.01b0.9248.45c0.7620.990.13
Avoidant47.690.9546.820.9246.620.760.410.00
Dependent47.43a1.0652.08b1.0249.10a,b0.844.040.03
Obsessive54.03a1.0044.15b0.9648.96c0.8017.620.11
High-functioning63.05a1.0945.38b1.0554.89c0.8749.290.27

Note. MOH group = medication-overuse headache group; SUD group = substance use disorder group; PD group = personality disorder group; SWAP-200 = Shedler-Westen Assessment Procedure-200; η2 = measure of effect size in analysis of covariance. Alphabetical superscripts indicate significant differences in post hoc analyses. Means with different alphabetic superscripts (a, b, and c) were statistically significant, while means with identical alphabetic superscripts were found not to be significantly different; ; .