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Table 1 Characteristics of the study population

From: Resistance exercise improves muscle strength, health status and pain intensity in fibromyalgia—a randomized controlled trial

  Resistance exercise (experimental) Relaxation therapy (control)  
(n = 67) (n = 63)
Mean (SD) Mean (SD)
Characteristics Median (min; max) Median (min; max) p value
Age, years 50.81 (9.05) 52.10 (9.78) 0.27
51 (25; 64) 55 (22; 64)
Symptom duration, years 11.06 (8.53) 9.44 (7.33) 0.38
9 (0; 35) 8 (0; 30)
Tender points, number 15.76 (1.92) 15.49 (2.00) 0.48
16 (11; 18) 16 (11; 18)
Body mass index 27.39 (5.29) 28.66 (5.32) 0.06
26 (20; 41) 27 (18; 43)
LTPAI, h 5.62 (4.80) 5.79 (6.25) 0.52
4 (0; 28) 4 (1; 38)
  Number (%) Number (%)  
Pharmacologigal treatment
NSAID paracetamol    
 Yes 53 (79 %) 44 (70 %) 0.22
Opioids for mild to moderate pain    
 Yes 13 (19 %) 12 (19 %) 1.00
Antidepressants    
 Yes 32 (48 %) 24 (38 %) 0.22
Anticonvulsives    
 Yes 4 (6 %) 2 (3 %) 0.68
Sedatives    
 Yes 11 (16 %) 12 (19 %) 0.82
Education
≤9 years 8 (12 %) 15 (24 %)  
10–12 years 34 (51 %) 22 (35 %)  
>12 years 25 (37 %) 26 (41 %) 0.88
Living with an adult    
 Yes 45 (67 %) 40 (64 %) 0.71
Born in Sweden 60 (90 %) 56 (89 %) 0.56
Work status
0 % 29 (43 %) 26 (41 %)  
20–49 % 2 (3 %) 4 (6 %)  
50 % 13 (19 %) 11 (18 %)  
51–79 % 8 (12 %) 8 (13 %)  
100 % 15 (22 %) 14 (22 %) 0.71
Sick leave/disability pension
25 % 9 (13 %) 5 (8 %)  
50 % 16 (24 %) 9 (14 %)  
75 % 2 (3 %) 3 (5 %)  
100 % 21 (31 %) 22 (35 %) 0.86
  1. Missing values, LTPAI: n = 1. NSAID non-steroidal anti-inflammatory drugs, LTPAI leisure time physical activity instrument