Groups Age Gender Duration of symptoms Activities Hand dominance
  Pearson correlation coefficient Eta coefficient
Elbow breadth Combined 0.46 0.02 NA 0.08 0.12
Case 0.90 0.20  0.82  0.36  0.03
Control 0.40  0.08 NA  0.17  0.18
EC-Elbjt Combined 0.30 0.02 NA 0.09 0.27
Case 0.57  0.01 0.82 0.12   0.05
Control 0.16  0.02 NA  0.10  0.33
EC-Abjt Combined 0.08 0.03 NA 0.12 0.32
Case 0.78  0.009 0.86 0.15  0.10 
Control 0.02*  0.04 NA  0.12  0.42*
0.24*
EC-Beljt Combined 0.81 0.02 NA 0.23 0.44*
Case 0.29  0.02 0.62 0.25   0.20
Control 0.28  0.02 NA  0.24 0.53* 
Arm length Combined 0.76 0.09 NA 0.07 0.06
Case 0.64  0.02 0.23 0.14  0.005 
Control 0.97  0.14 NA  0.17  0.10
*indicates moderate correlation
Key: EC-Abjt, elbow circumference five cm above the elbow joint; EC-Eljt, elbow circumference at the level of the elbow joint; EC-Beljt, elbow circumference five cm below the elbow joint; NA, not applicable; r=Eta coefficient
Table 1: Association of anthropometric measurements with age, gender, duration of symptoms, activities, and hand dominance