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Table 1 Baseline values, change from baseline in outcome variables, and within-group and between-group differences in change in the resistance exercise group and the active control group

From: Resistance exercise improves physical fatigue in women with fibromyalgia: a randomized controlled trial

  Resistance exercise group Active control group Resistance vs active control group
  Baseline n = 67 Mean (SD) ∆ 15 weeks n = 56 Mean (SD), min, max Within-group analysis p value Baseline n = 63 Mean (SD) ∆ 15 weeks n = 49 Mean (SD), min, max Within-group analysis p value Between-group analysis of baseline p value Between group analysis of change p value Between-group analysis of change, adjusted p value*
MFI-20          
General fatigue 17.3 (2.7) −1.3 (3.1), −10, – 7 0.003 17.8 (2.74) −0.5 (2.6), −9, – 4 0.48 0.17 0.031 0.37
Physical fatigue 16.0 (3.0) −1.7 (4.3), −13, – 8 0.011 16.5 (2.9) 0.0 (2.7), −8, – 5 0.66 0.29 0.013 0.044
Mental fatigue 15.0 (3.3) −1.6 (3.4), −10, – 7 0.001 15.0 (4.0) −0.1 (2.5), −6, – 5 0.85 0.56 0.008 0.070
Reduced activity 14.6 (3.4) −1.0 (3.6), −13, – 6 0.055 15.2 (3.5) −0.1 (2.8), −8, – 5 0.89 0.29 0.12 0.069
Reduced motivation 10.5 (3.5) −0.6 (3.7), −10, – 10 0.16 10.4 (3.6) 0.4 (2.8), −8, – 6 0.34 0.78 0.061 0.32
Exploratory outcomes          
FIQ fatigue 81.4 (17.3) −8.6 (21.2), −87, – 66 0.002 81.8 (15.8) −5.5 (19.0), −81, – 73 0.11 0.95 0.27 0.18
PSQI          
Duration of sleep 1.1 (1.1) −0.0 (0.9), −3, – 3 0.73 1.1 (1.2) −0.2 (0.9), −2, – 2 0.22 0.94 0.46 0.26
Sleep efficiency 1.9 (1.1) −0.3 (1.0), −3, – 1 0.061 1.4 (1.2) 0.1 (1.2), −2, – 3 0.55 0.027 0.14 0.37
Sleep disturbance 2.0 (0.6) 0.0 (0.6), −1, – 1 1.00 2.0 (0.6) 0.1 (0.6), −1, – 1 0.35 0.89 0.50 0.37
Sleep latency 1.7 (1.0) −0.1 (0.8), −2, – 1 0.26 1.8 (1.0) 0.0 (0.8), −2,– 2 0.84 0.83 0.53 0.32
Day dysfunction 1.6 (0.8) −0.1 (0.8), −2, – 2 0.45 1.7 (0.8) 0.0 (0.8), −2, – 2 1.00 0.49 0.64 0.65
Sleep quality 1.8 (0.8) −0.2 (0.8), −2, – 1 0.047 1.9 (0.8) 0.0 (0.8), −1, – 2 0.69 0.90 0.19 0.16
Need meds to sleep 1.0 (1.3) −0.1 (1.2), −3, – 3 0.69 1.0 (1.3) 0.3 (1.0), −2, – 3 0.036 0.82 0.27 0.10
PSQI total score 10.9 (4.3) −0.6 (3.4), −11, – 9 0.18 10.8 (4.0) 0.5 (3.0), −5, – 9 0.48 0.76 0.13 0.23
PCS          
Rumination 6.3 (3.6) −0.9 (3.5), −8, – 12 0.046 6.6 (4.3) −0.8 (3.2), −8, – 10 0.056 0.81 0.97 0.11
Magnification 3.4 (2.5) −0.6 (1.9), − 4, – 4 0.030 3.6 (2.8) −0.4 (2.0), −5, – 3 0.25 0.82 0.50 0.18
Helplessness 9.7 (5.3) −1.3 (4.0), −10, – 9 0.012 10.1 (5.9) −1.6 (4.6), −15, – 6 0.051 0.84 0.84 0.49
PCS total score 19.4 (10.0) −2.7 (7.6), −17, – 19 0.004 20.3 (11.9) −2.8 (7.9), −25, – 11 0.055 0.88 0.58 0.16
HADS          
Depression 7.0 (3.9) −0.7 (3.7), −9, – 11 0.086 6.7 (3.5) 0.3 (2.8), −6, – 12 0.49 0.80 0.082 0.11
Anxiety 7.9 (4.7) −0.3 (3.6), − 11, – 8 0.58 8.0 (4.5) 0.5 (2.7), − 9, – 8 0.10 0.94 0.22 0.099
  1. MFI-20 Multidimensional Fatigue Inventory, FIQ Fibromyalgia Impact Questionnaire, PSQI Pittsburgh Sleep Quality Index, PCS Pain Catastrophizing Scale, HADS Hospital Anxiety and Depression Scale
  2. * p value adjusted for PSQI sleep efficiency
  3. p values <0.05 are marked in bold print