TABLE 1.

Baseline characteristics.

	Control		Chronic pain		Analyses
	Male	Female	Male	Female	Sex		Group		Group × Sex
	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)	F	p	F	p	F	p
Age	30.75 (9.89)	33.77 (10.67)	38.65 (7.88)	37.48 (10.42)	0.19	0.67	7.33	< 0.01	0.96	0.33
Affect
PANAS negative**	10.75 (1.04)	11.27 (2.37)	15.41 (6.35)	12.04 (3.17)	1.72	0.2	6.24	0.02	3.18	0.08
PANAS positive**	29.63 (4.10)	33.2 (9.56)	29.65 (6.9)	24.83 (8.09)	0.09	0.77	3.89	0.05	3.93	0.05
POMS TMD**	-3.25 (5.75)	-2.07 (10.94)	21.71 (23.88)	10.67 (12.94)	1.29	0.26	18.88	< 0.01	1.99	0.16
STAI State Anxiety**	29.63 (7.96)	29.20 (6.21)	40.94 (12.16)	37.19 (9.76)	0.63	0.43	13.54	< 0.01	0.40	0.53
Pain
McGill pain intensity	–	–	45.0 (21.14)	58.09 (21.87)	1.90*	0.07*	–	–	–	–
McGill pain unpleasantness**	–	–	46.29 (23.38)	57.73 (21.53)	1.6*	0.12*	–	–	–	–

Analyses represent the results of a two-way ANOVA with Sex and Group as factors except where denoted by (*), which indicates use of a two-sample t-test. PANAS, Positive and Negative Affect Schedule, POMS TMD, Profile of Mood States Total Mood Disturbance, STAI, State-Trait Anxiety Inventory. Double asterisks indicate analyses with reduced sample sizes as follows: PANAS Negative, n = 63; PANAS Positive, n = 63; POMS TMD, n = 61; STAI State Anxiety, n = 60; McGill Pain Unpleasantness, n = 39. Affect denotes affective measures. Pain denotes pain measures.