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Table 4 Characteristics of the subjects included in the studies

From: The prevalence of myofascial trigger points in neck and shoulder-related disorders: a systematic review of the literature

Study Stage and type of disorder Patients Sample, n Sex, % Female Age (y), Mean ± SD or % Other Characteristics, Mean ± SD or % Healthy Controls Sample, n Sex, % Female Age (y), Mean ± SD or % Other Characteristics, Mean ± SD or %
Alonso-Blanco et al., 2011 Chronic TTH 20 Children (6–12 years)
20 Adults (18–47 years)
50% female Children = 8 ± 2 years
Adults = 41 ± 11 years
PH(years)-
Children = 1.6 ± 0.8
Adults = 8.6 ± 6.5
HI (NPRS)-
Children = 5.0 ± 1.2
Adults = 5.9 ± 1.1
HD (hours/days)-
Children = 4.8 ± 2.6
Adults = 7.3 ± 2
HF(days/week)-
Children = 4.0 ± 0.9
Adults = 4.3 ± 0.9
0 Not assessed Not assessed Not assessed
Bron et al., 2011 Chronic SP 72 patients 69% Female 43.9 ± 12.3 years Duration-
6–9 months = 23%
9–12 months = 19%
1–2 years = 18%
2–5 years = 19%
> 5 years = 19%
Recurrence rate-
1st = 36%
2nd = 26%
3rd > = 37%
0 Not assessed Not assessed Not assessed
Fernandez-Perez et al., 2012 Acute WAD 20 participants aged over 20 years 50% women 28.7 ± 12.4 (22.9,34.4) Height, cm: 170.0 ± 10.6 (165.0,175.0)
Weight kg: 67.7 ± 16.3 (60.1,75.4)
Time from accident, d: 26.6 ± 3.8 (24.8,28.4)
Current pain (NPRS): 6.2 ± 2.6 (5.0, 7.5)
Worst pain (NPRS): 8.0 ± 2.0 (7.0, 8.9)
Lowest pain (NPRS): 3.3 ± 2.9 (1.9, 4.7)
20 50% female 29.1 ± 12.2 (23.3, 34.8) Height cm: 160.7 ± 39.1 (142.3, 179.0)
Weight kg: 64.1 ± 23.3 (53.2, 75.1)
Fernández-De-Las-Peñas, 2012 NSP 16 Blue collar workers
19 White collar worker
Blue = 62% Female
White = 75% female
Blue = 44 ± 13 years
White = 44 ± 14 years
PH (months)-
Blue = 13.2 ± 5.3
White = 9.1±  5.5
MP (NPRS)-
Blue = 5.0 ± 2.5
White = 3.8 ± 2.6
0 Not Assessed Not Assessed Not Assessed
Hidalgo-Lozano et al., 2010 ULSIStage of condition unclear 12 patients 42% female 25 ± 9 years   10 50% female 26 ± 8 years  
Sari 2012 Acute and chronic Cervical radiculopathy 244 52% female 44.6 ± 10.3 years BMI (kg/m2)- 26.28 ± 5.25
Social status:
Married 70%, single 23%, widow 7%
Education:
University 40%, high school 38%, primary education 18%, uneducated 4%
Occupation:
Housewife 32%, worker 25%, retired 13%, student 9%, officer 8%, nurse 5%, other 8%
Major trauma history 15.6%
122 N/A 43.8 ± 9.8 years N/A
Tali et al., 2014 EM
Stage unclear
20 Physical therapy students 90% female 24.95 ± 1.79 years BMI (kg/m2): 21.68 ± 2.62
HF (days in the past 3 months):
6.60 ± 5.88
AS (NPRS): 6.45 ± 1.50
20 Physical Therapy students 85% female 25.65 ± 1.42 years. BMI (kg/m2)-
21.69 ± 2.08
  1. Abbreviations: TTH tension type headache, SP Shoulder pain, WAD Whiplash associated disorder, NSP Non-specific pain, EM Episodic migraines, ULSI Unilateral shoulder impingement, SD Standard deviation, PH Pain history, HI Headache intensity, HD Headache duration, HF Headache frequency, AS Average severity, NPRS Numeric pain rating scale, MP Mean pain, BMI Body mass index