Table 1

Clinical data in lean, overweight and obese patients with fibromyalgia

Lean (group 1)

Overweight (group 2)

Obese (group 3)

Lean vs overweight

Lean vs obese


Median (range)

n

Median (range)

n

Median (range)

n

P-valuea


Age, years

52.0 (33.5 to 54.0)

9

53.0 (48.0 to 56.0)

26

51.0 (47.0 to 55.5)

13

0.288

0.647

BMI, kg/m2

23.5 (21.5 to 24.0)

9

28.1 (27.1 to 29.5)

26

32.7 (30.8 to 35.7)

13

<0.001

<0.001

Tender points, n

14.0 (12.5 to 15.5)

9

15.0 (13.0 to 17.0)

26

15.0 (13.0 to 16.0)

13

0.224

0.393

Baseline FIQ fatigue, mm

97.0 (77.5 to 98.0)

9

74.0 (52.8 to 88.5)

26

88.0 (72.5 to 91.5)

13

0.008

0.110

Baseline MFIGF

20.0 (17.0 to 20.0)

9

16.5 (13.0 to 20.0)

26

17.0 (14.5 to 20.0)

13

0.061

0.209

Change in FIQ fatigue after 15 weeks, mm

-7.0 (-13.5 to 0.0)

P = 0.046

8

-0.5 (-16.3 to 8.3)

P = 0.485

26

-8.0 (-20.5 to 2.0)

P = 0.059

13

0.368

0.972

Change in FIQ fatigue after 30 weeks, mm

-4.5 (-12.8 to 0.3)

P = 0.161

8

-2.0 (-7.0 to 8.8)

P = 0.966

24

-2.5 (-6.8 to 4.5)

P = 0.345

12

0.254

0.473

Change in MFIGF after 15 weeks

-2.0 (-4.2 to 0.0)

P = 0.084

8

0.0 (-1.2 to 1.0)

P = 0.515

26

0.0 (-3.5 to 1.0)

P = 0.641

13

0.164

0.336

Change in MFIGF after 30 weeks

-3.0 (-5.5 to -2.0)

P = 0.017

8

-2.0 (-3.0 to 0.0)

P = 0.001

24

-3.0 (-4.0 to -1.0)

P = 0.016

12

0.147

0.624


Levels of fatigue (FIQ and MFIGF) at baseline (0 weeks), during training (15 weeks) and after training (30 weeks). Lean patients had BMI 18.5 to 24.9; overweight patients had BMI 25.0 to 29.9. Obese patients had BMI ≥30.0. Median values and interquartile range are indicated. aMann-Whitney U-test. n, number; BMI, body mass index; FIQ, Fibromyalgia Impact Questionnaire; MFIGF, Multidimensional Fatigue Inventory subscale of General Fatigue.

Bjersing et al. Arthritis Research & Therapy 2013 15:R34   doi:10.1186/ar4187

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