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Table 4 Orthotics Prosthetics User Survey (OPUS) frequency distribution for functional items

From: Functional performance and patient satisfaction comparison between a 3D printed and a standard transradial prosthesis: a case report

OPUS Module 3 Raw scores
Functional items 3D printed arm Standard prosthesis
Drink from a paper cup 4 4
Use fork or spoon 3 4
Pour from a 12 oz. can 3 4
Dial a touch-tone phone 3 4
Stir in a bowl 3 4
Put on and take off prosthesis 4 4
Average 3.3 ± 0.52 4.0 ± 0.0
  1. 5 = very easy, 4 = easy, 3 = slightly difficult, 2 = very difficult, 1 = cannot perform activity, 0 = not applicable. Mean values calculated excluding 0 = not applicable raw scores