title: Is a triaxial accelerometer a reliable device to measure head excursion?
abstract: BACKGROUND
  The reliability of a triaxial accelerometer in measuring the head excursion during typing task among occupational typists has not been reported so far.
  
  
  OBJECTIVE
  This study aimed to investigate the intra-rater reliability of triaxial accelerometer measurement of head excursion.
  
  
  METHODS
  The triaxial accelerometer measurements were taken to measure head excursion of 8 participants typing in the computer. The intra-rater reliability such as intraclass correlation coefficient, standard error of measurements and coefficient of variation was calculated. The Bland-Altman plot was performed to strengthen the study result.
  
  
  RESULTS
  The analysis of the results showed that the intra-rater reliability of triaxial accelerometer was high with intraclass correlation coefficient (2,1) of 0.986, standard error of measurements (1.05 Hz) and coefficient of variation (3.2%) for two trials of measurements. The Bland-Altman reported an acceptable agreement between the two measurements taken using the triaxial accelerometer to measure head excursion.
  
  
  CONCLUSIONS
  The triaxial accelerometer is a simple, objective and useful technology to measure head excursion among the occupational typists.
authors.affiliation: School of Rehabilitation Sciences, Wellness and Rehabilitation Research Niche Group, Faculty of Health Science, Universiti Kebangsaan Malaysia, Malaysia.
authors.forename: Subramaniam
authors.initials: S
authors.lastname: Ambusam
authors.affiliation: Department of Biomedical Sciences, School of Diagnostic and Applied Health Sciences, Wellness and Rehabilitation Research Niche Group, Faculty of Health Science, Universiti Kebangsaan Malaysia, Malaysia.
authors.forename: Baharudin
authors.initials: B
authors.lastname: Omar
authors.affiliation: School of Rehabilitation Sciences, Wellness and Rehabilitation Research Niche Group, Faculty of Health Science, Universiti Kebangsaan Malaysia, Malaysia.
authors.forename: Leonard
authors.initials: L
authors.lastname: Joseph
authors.affiliation: Biofit Technology and Services, Singapore.
authors.forename: Seng Poh
authors.initials: SP
authors.lastname: Meng
authors.affiliation: School of Rehabilitation Sciences, Wellness and Rehabilitation Research Niche Group, Faculty of Health Science, Universiti Kebangsaan Malaysia, Malaysia.
authors.forename: Fazlina Asma Mohd
authors.initials: FA
authors.lastname: Padzil
mesh_terms: D061725:Accelerometry / Q000379:methods* / Q000592:standards*; D000328:Adult; D001696:Biomechanical Phenomena; D005260:Female; D006257:Head; D006801:Humans; D008297:Male; D009068:Movement / Q000502:physiology*; D015588:Observer Variation; D015203:Reproducibility of Results
keywords: Accelerometer; head excursion; measurement; neck movement; reliability