Clinical Ophthalmology (Dec 2022)

Accuracy and Correlation of the Kinect-Based Semi-Automatic Scoring Method for Measuring Anomalous Head Posture as Compared to the CROM® Device

  • Yamamoto M,
  • Yagasaki T,
  • Ichikawa S,
  • Nakamura T,
  • Konishi Y,
  • Yokoyama Y

Journal volume & issue
Vol. Volume 16
pp. 4033 – 4040

Abstract

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Mana Yamamoto,1 Teiji Yagasaki,1,2 Sho Ichikawa,1 Takuto Nakamura,3,4 Yuumi Konishi,5 Yoshimi Yokoyama1 1Department of Ophthalmology, Japan Community Healthcare Organization Chukyo Hospital, Nagoya, Aichi, Japan; 2Yagasaki Eye Clinic, Ichinomiya, Aichi, Japan; 3Department of Mechano-Informatics, Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan; 4Japan Society for the Promotion of Science, Tokyo, Japan; 5Department of Computer Science, School of Computing, Tokyo Institute of Technology, Tokyo, JapanCorrespondence: Mana Yamamoto, Department of Ophthalmology, Japan Community Healthcare Organization Chukyo Hospital, 1-1-10 Sanjo Minami-ku, Nagoya, Aichi, 457-8510, Japan, Tel +81-52-691-7151, Fax +81-52-692-5220, Email [email protected]: To determine the reliability of the Kinect-based semi-automatic scoring method (KSSM) using Kinect for Windows v2 for head posture compared to the cervical range-of-motion (CROM) device.Methods and Analysis: Head positions between − 40° and +40° of chin up/down (X), head turn (Y), and lateral tilt (Z) were measured in 10° increments in healthy volunteers. Their head positions were simultaneously measured using the KSSM and CROM. The following four points were analyzed: the success rate of the KSSM, the correlation between the two methods, the comparison of results by 95% limits of agreement (LA), and proportional error at 95% LA.Results: The measurability of the KSSM for all positions within ± 30° of the X, Y, and Z axes was 100%. The correlations for both methods were 0.979 (95% CI: 0.967– 0.987), 0.985 (0.976– 0.991), and 0.988 (0.981– 0.993) for the X-, Y-, and Z-axes, respectively. The simple linear regression analysis equations for 95% LA were Y=− 0.024X-0.452 for X axes, Y=0.024X-0.363 for Y axes, and Y=− 0.045X+0.217 for Z axes (95% confidence interval for each axis: − 0.055– 0.007, − 0.006– 0.050, and − 0.071– 0.018). However, the proportional biases were small because the predictive values of the differences in head positions from − 40° to 40° determined by the equations were within ± 5° for chin up/down and within ± 3° for head tilt.Conclusion: Head posture measurements using the KSSM and CROM were found to be similar when used in clinical settings.Keywords: anomalous head posture, Kinect, CROM, spine, reliability

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