Ham, A.M. van (2017) Validity and reliability of a hand-held dynamometer for measuring forearm rotation strength compared to the Biodex. thesis, Medicine.
![[img]](https://umcg.studenttheses.ub.rug.nl/style/images/fileicons/text.png) |
Text
HamvanAM.pdf Restricted to Registered users only Download (548kB) |
Abstract
Background: A significant number of disorders of the hand and wrist affect the pronation and supination strength of the forearm. In order to evaluate the effect of treatment concerning forearm rotation, rotational muscle strength is assessed using dynamometry. The two main options are dynamometers such as the Cybex and the Biodex®; expensive and spacious machines, and a hand-held dynamometer named the Baseline® Hydraulic Wrist Dynamometer (BHWD); a portable and convenient device. The Biodex® has been proven to be a valid and reliable device and therefore it is considered to be the gold standard. Unfortunately, these clinimetric properties of the BHWD are unknown. Study aim: To determine the concurrent validity, the intra- and inter-rater reliability of the BHWD. Methods: An observational test-retest design was set-up. Healthy participants without neurological illness or injury of the hand, wrist or elbow in the last 6 months were included. During four sessions, pronation and supination strength were measured three times per session on both arms using the BHWD (three sessions) by two observers and using the Biodex® (one session). Concurrent validity was established using Pearson’s correlation coefficient (r) for the parametric pronation measurements and Spearman’s rank correlation coefficient (rs) for the non-parametric supination measurements. Intra- and inter-rater reliability were established using intraclass correlation coefficients (ICC) for both rotational directions. To determine the agreement within one observer and between two observers using the BHWD, Bland-Altman plots with Limits of Agreement (LoA) were generated. Results: 21 healthy participants (42 arms) were included. Concurrent validity for pronation strength was r = 0.650 (p = 0.000) and for supination strength rs = 0.677 (p = 0.000). Intra-rater reliability for pronation strength was ICC = 0.912 (p = 0.000) with a mean difference of -2,57 (LoA: -33.28; 28.14) and for supination strength was ICC = 0.967 with a mean difference of 4.48 (LoA: -21.08; 30.03). Inter-rater reliability for pronation strength was ICC = 0.888 (p = 0.000) with a mean difference of 0.76 (LoA: -34.68; 36.19) and for supination strength was ICC = 0.958 (p = 0.000) with a mean difference of 4.43 (LoA: -24.46; 33.32). Conclusion: The BHWD used according to the measuring procedure in this study cannot replace the isometric mode for pronation and supination strength of the Biodex®. When a protocol using the BHWD is proven valid and reliable, this portable and convenient device can be a highly recommended alternative for measuring rotational muscle force output of the forearm.
| Item Type: | Thesis (Thesis) |
|---|---|
| Supervisor name: | Faculty Supervisor: and Winter, Drs. E. Physiatrist |
| Supervisor name: | Second Supervisor: and Brink, Drs. S.M. Movement Scientist and Department of Rehabilitation Medicine and Isala Hospital Zwolle |
| Faculty: | Medical Sciences |
| Date Deposited: | 25 Jun 2020 11:00 |
| Last Modified: | 25 Jun 2020 11:00 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/2026 |
Actions (login required)
 |
View Item |