Table 1.

Baseline characteristics. Values are the mean (SD) unless otherwise specified.

CharacteristicsMotivational Interviewing, n = 107Attention Control, n = 109
Demographics
Age, yrs46.0 (11.4)45.7 (11.0)
Female, %9695
Non-Hispanic, %99.198.2
White, %90.786.2
Education, > high school, %76.678.9
Married, %57.964.2
Employed, %57.949.5
Clinical variables
Body mass index, kg/m232.3 (7.6)30.5 (6.6)
FM diagnosis duration, yrs8.9 (6.4)9.1 (7.6)
PHQ-8 depression, range 0–24*12.4 (4.8)12.7 (5.1)
BPI pain severity, range 0–10*5.9 (1.2)6.0 (1.4)
SF-36 physical function41.36 (17.7)40.28 (20.2)
FIQ total, range 0–100*67.5 (12.0)66.6 (13.5)
Prescribed medications, %
  Nontricyclic antidepressants66.457.8
  Anticonvulsants31.827.5
  Opioid analgesics32.733.0
Physical activity, self-report
  CHAMPS
  LMPA, h/week6.5 (5.6)6.7 (7.4)
  • * Higher score indicates a worse state of health (except for SF-36 physical function). FM: fibromyalgia; PHQ-8: Patient Health Questionnaire 8; BPI: Brief Pain Inventory; SF-36: Medical Outcomes Study Short Form-36; FIQ: Fibromyalgia Impact Questionnaire; CHAMPS: Community Health Activities Model Program for Seniors; LMPA: light to moderate physical activity.