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Table 8 Influence of moderating variables on all the outcomes assessed, on the Fibromyalgia Impact Questionnaire and on the Global Function

From: A meta-analysis of the efficacy of fibromyalgia treatment according to level of care

  All the outcome assessed Fibromyalgia Impact Questionnaire Global function
  Std dif in means Lower Upper p-value Std dif in means Lower Upper p-value Std dif in means Lower Upper p-value
Methodological quality             
1 to 2 1,21 0.74 1.69 0.000      1.40 0.75 2.04 0.000
3 to 4 0.57 0.42 0.72 0.000 0.66 0.37 0.95 0.000 0.58 0.33 0.83 0.000
5 to 6 0.23 0.14 0.31 0.000 0.36 0.18 0.55 0.000 0.37 0.22 0.51 0.000
Overall 0.33 0.26 0.41 0.000 0.45 0.29 0.60 0.000 0.46 0.33 0.58 0.000
Kind of treatment             
Pharmacological 0.42 0.32 0.53 0.000 0.59 0.29 0.89 0.000 0.54 0.33 0.74 0.000
Non-pharmacological 0.63 0.43 0.83 0.000 0.52 0.26 0.79 0.000 0.52 0.26 0.79 0.000
Overall 0.47 0.37 0.56 0.000 0.55 0.35 0.75 0.000 0.53 0.37 0.70 0.000
Length of treatment (weeks)             
0 to 8 0.73 0.57 0.89 0.000 0.83 0.35 1.30 0.001 0.82 0.50 1.14 0.000
9 to16 0.20 0.11 0.28 0.000 0.35 0.20 0.49 0.000 0.33 0.20 0.46 0.000
17 to 24 0.36 0.14 0.58 0.001 0.73 0.29 1.16 0.001 0.35 -0.01 0.71 0.055
Overall 0.31 0.24 0.38 0.000 0.42 0.29 0.55 0.000 0.40 0.28 0.51 0.000
Age             
30 to 39 1.41 0.95 1.88 0.000 1.41 0.97 1.85 0.000 1.41 0.97 1.85 0.000
40 to 49 0.44 0.35 0.54 0.000 0.37 0.25 0.50 0.000 0.39 0.28 0.51 0.000
50 to 59 0.50 0.12 0.88 0.010 0.99 -0.22 2.20 0.108 0.99 -0.22 2.20 0.108
Overall 0.48 0.39 0.58 0.000 0.46 0.34 0.58 0.000 0.47 0.35 0.58 0.000
Women (%)             
< 80 3.22 0.68 5.76 0.013         
80 to 89 0.70 0.49 0.91 0.000 0.96 0.30 1.62 0.004 0.85 0.46 1.24 0.000
90 to 99 0.33 0.23 0.44 0.000 0.37 0.13 0.61 0.002 0.31 0.14 0.47 0.000
100 0.40 0.25 0.55 0.000 0.50 0.23 0.78 0.000 0.50 0.23 0.78 0.000
Overall 0.41 0.33 0.49 0.000 0.46 0.29 0.64 0.000 0.42 0.28 0.55 0.000
Duration of disorder (years)             
0 to 5 0.85 0.57 1.13 0.000 0.57 0.21 0.93 0.002 0.66 0.34 0.98 0.000
6 to10 0.36 0.27 0.45 0.000 0.45 0.26 0.64 0.000 0.38 0.22 0.54 0.000
11 to15 0.16 0.02 0.29 0.023         
Overall 0.36 0.29 0.43 0.000 0.49 0.33 0.65 0.000 0.45 0.31 0.58 0.000
Country             
Germany 0.36 0.17 0.56 0.000         
Belgium 0.94 0.73 1.15 0.000      1.02 0.35 1.70 0.003
Brazil 1.13 0.46 1.80 0.001 0.99 -0.22 2.20 0.108 0.99 -0.22 2.20 0.108
Canada 0.35 0.20 0.50 0.000 0.38 0.17 0.59 0.000 0.29 0.11 0.46 0.001
Finland 0.10 -0.08 0.28 0.283         
Netherlands 0.09 -0.21 0.39 0.567         
Norway 0.30 -0.11 0.71 0.157         
Sweden 0.35 0.05 0.64 0.022 0.45 0.03 0.88 0.038 0.45 0.03 0.88 0.038
Switzerland 0.02 -0.21 0.26 0.836         
Turkey 2.19 1.31 3.08 0.000 1.41 0.97 1.85 0.000 1.41 0.97 1.85 0.000
USA 0.39 0.26 0.51 0.000 0.34 0.16 0.53 0.000 0.36 0.21 0.50 0.000
Overall 0.36 0.30 0.43 0.000 0.46 0.33 0.58 0.000 0.42 0.31 0.52 0.000