title: Anthropometric data reduction using confirmatory factor analysis.
abstract: OBJECTIVE
  The unavailability of anthropometric data especially in developing countries has remained a limiting factor towards the design of learning facilities with sufficient ergonomic consideration. Attempts to use anthropometric data from developed countries have led to provision of school facilities unfit for the users. The purpose of this paper is to use factor analysis to investigate the suitability of the collected anthropometric data as a database for school design in Nigerian tertiary institutions.
  
  
  METHODS
  Anthropometric data were collected from 288 male students in a Federal Polytechnic in North-West of Nigeria. Their age is between 18-25 years.
  
  
  METHODS
  Nine vertical anthropometric dimensions related to heights were collected using the conventional traditional equipment. Exploratory factor analysis was used to categorize the variables into a model consisting of two factors. Thereafter, confirmatory factor analysis was used to investigate the fit of the data to the proposed model.
  
  
  RESULTS
  A just identified model, made of two factors, each with three variables was developed. The variables within the model accounted for 81% of the total variation of the entire data. The model was found to demonstrate adequate validity and reliability. Various measuring indices were used to verify that the model fits the data properly. The final model reveals that stature height and eye height sitting were the most stable variables for designs that have to do with standing and sitting construct.
  
  
  CONCLUSIONS
  The study has shown the application of factor analysis in anthropometric data analysis. The study highlighted the relevance of these statistical tools to investigate variability among anthropometric data involving diverse population, which has not been widely used for analyzing previous anthropometric data. The collected data is therefore suitable for use while designing for Nigerian students.
authors: Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Johor, Malaysia.
authors: Jafri Mohd
authors: JM
authors: Rohani
authors: Department of Industrial and Production Engineering, University of Ibadan, Ibadan, Nigeria.
authors: Akanbi Gabriel
authors: AG
authors: Olusegun
authors: Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Johor, Malaysia.
authors: Mat Rebi Abdul
authors: MR
authors: Rani
mesh_terms: D000293:Adolescent; D000328:Adult; D000886:Anthropometry; D001837:Body Weights and Measures; D003906:Developing Countries; D006804:Ergonomics; D005163:Factor Analysis, Statistical; D006801:Humans; D007374:Interior Design and Furnishings; D008297:Male; D008962:Models, Theoretical; D009549:Nigeria; D015203:Reproducibility of Results; D012574:Schools; D055815:Young Adult
keywords: Exploratory factor analysis; measurement model; school ergonomics