Table 4.

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

VariableHH, n = 223ML, n = 268LL, n = 199Total, n = 690ph2
Average age, yrs50.27 (10.69)49.59 (10.81)46.70 (13.16)48.98 (11.58)0.0040.01
Female, %215 (96.4)251 (94.4)185 (93.4)651 (94.8)0.37
Duration of FM, mo121.1 (92.25)115.71 (101.76)106.15 (91.94)114.71 (96.01)0.28
BMI, weight/height, m230.45 (7.26)30.91 (7.6)30.27 (6.55)30.58 (7.2)0.61
  • h2: portion of variance in each variable accounted for by the solution. BMI: body mass index.