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Table 2 Reproducibility of Fibromyalgia Survey Questionnaire (Brazil) by telephone interview

From: Validity of fibromyalgia survey questionnaire (2016) assessed by telephone interview and cross-cultural adaptation to Brazilian Portuguese language

  Reproducibility Bias
Phone Self p
WPI 0.91 ± 0.02 5 [8] 4 [8] <  0.001 *
Region 1 (left upper) 0.74 ± 0.07 52% 41% 0.002
Left jaw 0.70 ± 0.09 25% 17% 0.011
Left shoulder 0.59 ± 0.08 47% 34% 0.003
Left upper arm 0.73 ± 0.08 30% 25% 0.132
Left lower arm 0.83 ± 0.07 25% 21% 0.102
Region 2 (right upper) 0.68 ± 0.07 56% 44% 0.003
Right jaw 0.64 ± 0.09 26% 16% 0.004
Right shoulder 0.59 ± 0.08 46% 34% 0.007
Right upper arm 0.64 ± 0.08 36% 28% 0,046
Right lower arm 0.70 ± 0.08 29% 25% 0.248
Region 3 (left lower) 0.82 ± 0.06 51% 48% 0.317
Left hip 0.89 ± 0.05 40% 37% 0.180
Left upper leg 0.72 ± 0.09 22% 19% 0.317
Left lower leg 0.62 ± 0.08 35% 32% 0.467
Region 4 (right lower) 0.84 ± 0.05 45% 45% 1.000
Right hip 0.75 ± 0.07 34% 33% 0.763
Right upper leg 0.71 ± 0.09 22% 22% 1.000
Right lower leg 0.77 ± 0.07 31% 31% 1.000
Region 5 (axial) 0.66 ± 0.08 71% 71% 1.000
Neck 0.54 ± 0.08 57% 50% 0.144
Upper back 0.70 ± 0.07 48% 43% 0.197
Lower back 0.63 ± 0.08 45% 39% 0.157
Chest 0.78 ± 0.08 23% 16% 0.008
Abdomen 0.69 ± 0.09 22% 18% 0.206
SSS 0.89 ± 0.03 6 [6] 6 [5] 0.614
Fatigue 0.64 ± 0.06 1 [2] 1 [1] 0.403
Waking unrefreshed 0.60 ± 0.06 2 [3] 1.5 [1] 0.120
Cognitive symptoms 0.69 ± 0.06 1 [2] 1 [2] 0.827
Headaches 0.83 ± 0.07 77% 79% 0.414
Abdominal pain 0.62 ± 0.08 49% 48% 0.819
Depression 0.89 ± 0.05 63% 64% 0.655
3 months 0.47 ± 0.10 83% 69% 0.002
FSS 0.94 ± 0.01 11 [13] 9 [11] < 0.001*
  1. WPI widespread pain index, SSS symptom severity scale, FSS fibromyalgia severity scale
  2. All reproducibility results are Cohen’s kappa values, except for WPI, SSS and FSS (Spearman’s R) ± standard errors. All bias results are p values of Wilcoxon tests. Results of WPI, SSS, FSS, “fatigue”, “waking unrefreshed” and “cognitive symptoms” are shown as median [interquartile range]. * indicates p values that were considered statistically significant (< 0.001, according Bonferroni correction for multiple comparisons)