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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