Personality and Personality Disorders in Medication-Overuse Headache: A Controlled Study by SWAP-200

Table 2

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

SWAP-200 PD scales	MOH group ()		SUD group ()		PD group ()		F(2, 273)	η^2
	M	SD	M	SD	M	SD
Paranoid	41.57^a	1.05	50.72^b	1.01	45.92^c	0.83	14.29	0.10
Schizoid	46.79	0.96	47.88	0.93	46.96	0.77	0.31	0.00
Schizotypal	43.59^a	0.95	50.97^b	0.92	46.03^c	0.75	12.10	0.08
Antisocial	43.20^a	0.86	53.56^b	0.83	47.69^c	0.68	27.67	0.17
Borderline	38.71^a	1.10	56.60^b	1.07	47.52^c	0.88	49.44	0.27
Histrionic	42.11^a	1.07	56.40^b	1.03	50.03^c	0.85	34.34	0.20
Narcissistic	43.00^a	0.95	53.01^b	0.92	48.45^c	0.76	20.99	0.13
Avoidant	47.69	0.95	46.82	0.92	46.62	0.76	0.41	0.00
Dependent	47.43^a	1.06	52.08^b	1.02	49.10^a,b	0.84	4.04	0.03
Obsessive	54.03^a	1.00	44.15^b	0.96	48.96^c	0.80	17.62	0.11
High-functioning	63.05^a	1.09	45.38^b	1.05	54.89^c	0.87	49.29	0.27

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; ; .