Table 3.

Means and standard deviations of the 8 MPI-S scales in each MPI subgroup.

MPI-S scale	Cluster	Mean	SD	F	DF	p <
Pain severity	ID	4.34	0.79	21.84	2/245	0.001
	DYS	4.44	0.85
	AC	3.37	0.85
Interference	ID	4.60	0.73	85.68	2/245	0.001
	DYS	4.49	0.72
	AC	2.84	0.62
Life control	ID	2.41	0.94	29.11	2/245	0.001
	DYS	2.63	1.00
	AC	3.89	0.84
Affective distress	ID	3.75	1.14	33.32	2/245	0.001
	DYS	3.45	1.07
	AC	1.94	1.13
Social support	ID	3.06	1.27	56.59	2/245	0.001
	DYS	4.61	0.96
	AC	3.69	1.48
Punishing responses	ID	2.79	1.36	57.09	2/245	0.001
	DYS	1.01	0.98
	AC	1.25	1.34
Solicitous response	ID	1.68	0.94	78.69	2/245	0.001
	DYS	3.59	1.13
	AC	2.29	1.22
Distract responses	ID	1.29	0.96	58.22	2/245	0.001
	DYS	2.91	1.07
	AC	2.04	1.13

Univariate ANOVA's and p-values. ID = interpersonal distressed, DYS = dysfunctional, AC = active copers.