M Abdulhadi Alagha1, Mahmoud A Alagha2, Eleanor Dunstan3, Olaf Sperwer4, Kate A Timmins5, Bronek M Boszczyk6. 1. Academic Orthopaedics, Trauma and Sports Medicine, Queen's Medical Centre, The University of Nottingham, Nottingham, NG7 2UH, UK. 2. Medical, Veterinary and Life Sciences College, University of Glasgow, Dental Hospital, Glasgow, G2 3JZ, UK. 3. Centre for Spinal Studies and Surgery, Queen's Medical Centre, Nottingham, NG7 2UH, UK. 4. VRmed Ltd., Rosewood House, Radcliffe on Trent, Nottingham, NG12 2BQ, UK. 5. School of Sport and Exercise Science, University of Lincoln, Lincoln, LN6 7TS, UK. 6. Centre for Spinal Studies and Surgery, Queen's Medical Centre, Nottingham, NG7 2UH, UK. bronek.boszczyk@nuh.nhs.uk.
Abstract
PURPOSE: To assess the reliability and validity of a hand motion sensor, Leap Motion Controller (LMC), in the 15-s hand grip-and-release test, as compared against human inspection of an external digital camera recording. METHODS: Fifty healthy participants were asked to fully grip-and-release their dominant hand as rapidly as possible for two trials with a 10-min rest in-between, while wearing a non-metal wrist splint. Each test lasted for 15 s, and a digital camera was used to film the anterolateral side of the hand on the first test. Three assessors counted the frequency of grip-and-release (G-R) cycles independently and in a blinded fashion. The average mean of the three was compared with that measured by LMC using the Bland-Altman method. Test-retest reliability was examined by comparing the two 15-s tests. RESULTS: The mean number of G-R cycles recorded was: 47.8 ± 6.4 (test 1, video observer); 47.7 ± 6.5 (test 1, LMC); and 50.2 ± 6.5 (test 2, LMC). Bland-Altman indicated good agreement, with a low bias (0.15 cycles) and narrow limits of agreement. The ICC showed high inter-rater agreement and the coefficient of repeatability for the number of cycles was ±5.393, with a mean bias of 3.63. CONCLUSIONS: LMC appears to be valid and reliable in the 15-s grip-and-release test. This serves as a first step towards the development of an objective myelopathy assessment device and platform for the assessment of neuromotor hand function in general. Further assessment in a clinical setting and to gauge healthy benchmark values is warranted.
PURPOSE: To assess the reliability and validity of a hand motion sensor, Leap Motion Controller (LMC), in the 15-s hand grip-and-release test, as compared against human inspection of an external digital camera recording. METHODS: Fifty healthy participants were asked to fully grip-and-release their dominant hand as rapidly as possible for two trials with a 10-min rest in-between, while wearing a non-metal wrist splint. Each test lasted for 15 s, and a digital camera was used to film the anterolateral side of the hand on the first test. Three assessors counted the frequency of grip-and-release (G-R) cycles independently and in a blinded fashion. The average mean of the three was compared with that measured by LMC using the Bland-Altman method. Test-retest reliability was examined by comparing the two 15-s tests. RESULTS: The mean number of G-R cycles recorded was: 47.8 ± 6.4 (test 1, video observer); 47.7 ± 6.5 (test 1, LMC); and 50.2 ± 6.5 (test 2, LMC). Bland-Altman indicated good agreement, with a low bias (0.15 cycles) and narrow limits of agreement. The ICC showed high inter-rater agreement and the coefficient of repeatability for the number of cycles was ±5.393, with a mean bias of 3.63. CONCLUSIONS:LMC appears to be valid and reliable in the 15-s grip-and-release test. This serves as a first step towards the development of an objective myelopathy assessment device and platform for the assessment of neuromotor hand function in general. Further assessment in a clinical setting and to gauge healthy benchmark values is warranted.
Authors: Sharmila Vaz; Torbjörn Falkmer; Anne Elizabeth Passmore; Richard Parsons; Pantelis Andreou Journal: PLoS One Date: 2013-09-09 Impact factor: 3.240
Authors: M Abdulhadi Alagha; Mahmoud A Alagha; Eleanor Dunstan; Olaf Sperwer; Kate A Timmins; Bronek M Boszczyk Journal: Eur Spine J Date: 2017-01-19 Impact factor: 3.134