Table 1.

Demographic characteristics of patients with fibromyalgia (FM) for Sample 1 (n = 690) and Sample 2 (n = 743). Values are expressed as mean (SD) unless otherwise indicated.

VariableSample 1 (n = 690)Sample 2 (n = 743)Total (n = 1433)p
Average age, yrs48.95 (11.55)49.80 (10.95)49.39 (11.24)0.15
Female, n (%)664 (94.7)718 (94.5)1382 (94.6)0.83
Duration of FM, mo115.77 (97.01)115.85 (94.42)95.64 (2.51)0.99
Height, m1.64 (0.08)1.64 (0.08)1.64 (0.08)0.71
BMI, weight/height, m230.57 (7.20)30.92 (7.42)30.75 (7.31)0.35
  • BMI: body mass index.