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Table 2 Correlations between objective physical activity and fibromyalgia symptomology assessments

From: Physical activity is related to function and fatigue but not pain in women with fibromyalgia: baseline analyses from the Fibromyalgia Activity Study with TENS (FAST)

Outcome domain Outcome variable No. of subjects Pearson’s correlation (unadjusted) Partial correlation (BMI and age-adjusted)
r (95% CI) p Value r (95% CI) p Value
Performance-Based Function Endurance (6MWT, ft) 159 0.43 (0.30, 0.55) < 0.001 0.28 (0.12, 0.41) < 0.001
Strength (5TSTS time, s) (ln) 156 − 0.17 (− 0.32, − 0.01) 0.01 − 0.02 (− 0.18, 0.14) 0.81
Self-reported function PROMIS PF 159 0.25 (0.09, 0.39) 0.002 0.15 (− 0.01, 0.30) 0.07
SF-36 PF 160 0.31 (0.15, 0.43) < 0.001 0.20 (0.06, 0.38) 0.01
Pain Resting pain (0–10) 171 − 0.04 (− 0.19, 0.11) 0.61 0.02 (− 0.14, 0.18) 0.80
Movement pain (6MWT) 160 − 0.09 (− 0.24, 0.07) 0.28 − 0.01 (− 0.17, 0.14) 0.87
Movement pain (5TSTS) 159 − 0.04 (− 0.19, 0.12) 0.65 − 0.00 (− 0.16, 0.16) 0.98
BPI severity 160 0.00 (− 0.16, 0.16) 0.99 0.01 (− 0.14, 0.17) 0.87
BPI interference 160 − 0.05 (− 0.20, 0.11) 0.52 − 0.02 (− 0.17, 0.14) 0.84
Pain sensitivity PPT cervical (ln) 159 − 0.10 (− 0.25, 0.06) 0.21 − 0.08 (− 0.24, 0.08) 0.31
PPT lumbar (ln) 159 − 0.04 (− 0.19, 0.12) 0.65 − 0.03 (− 0.19, 0.13) 0.70
PPT leg (ln) 159 0.01 (− 0.16, 0.15) 0.92 0.01 (− 0.16, 0.15) 0.88
CPM lumbar (%) 138 0.14 (− 0.03, 0.30) 0.10 0.14 (− 0.04, 0.30) 0.12
CPM leg (%) 134 0.07 (− 0.11, 0.23) 0.45 0.11 (− 0.06, 0.28) 0.21
Fatigue Resting fatigue (0–10) 171 − 0.11 (− 0.25, 0.05) 0.17 − 0.01 (− 0.17, 0.14) 0.86
Movement fatigue (6MWT) 160 − 0.20 (− 0.35, − 0.05) 0.01 − 0.20 (− 0.35, −0.05) 0.01
Movement fatigue (5TSTS) 160 0.00 (− 0.15, 0.16) 0.96 − 0.02 (− 0.18, 0.14) 0.81
Multidimensional (MAF) 159 − 0.05 (− 0.21, 0.11) 0.52 − 0.05 (− 0.20, 0.11) 0.58
Psychological constructs Pain Catastrophizing (Pain Catastrophizing Scale) 160 0.05 (− 0.10, 0.21) 0.52 0.01 (− 0.15, 0.16) 0.93
Fear of movement (TSK) 160 − 0.01 (− 0.17, 0.14) 0.89 − 0.01 (− 0.17, 0.15) 0.89
Disease impact FIQR total 171 − 0.12 (− 0.27, 0.03) 0.12 − 0.10 (− 0.25, 0.06) 0.24
Quality of life Physical (SF-36 PCS) 158 0.27 (0.11, 0.41) 0.001 0.22 (0.06, 0.37) 0.006
Emotional (SF-36 MCS) 158 − 0.01 (− 0.17, 0.14) 0.89 − 0.01 (− 0.17, 0.16) 0.99
  1. Abbreviations: MVPA Moderate to vigorous activity, 6MWT 6-minute walk test, 5TSTS Five Times Sit to Stand Test, PF Physical Function T-score for Patient-Reported Outcomes Measurement Information System physical function static short form, SF-36 PCS 36-item Medical Outcomes Study Short Form Health Survey Physical Component Summary, BPI Brief Pain Inventory, PPT Pressure pain threshold, CPM Conditioned pain modulation, MAF Multidimensional Assessment of Fatigue, TSK Tampa Scale for Kinesiophobia, FIQR Revised Fibromyalgia Impact Questionnaire, SF-36 MCS 36-item Medical Outcomes Study Short Form Health Survey Mental Component Score
  2. (ln) The natural logarithm of accelerometry MVPA was used
  3. All significance are bolded