A stress-strength interference model for predicting CTD probabilities

Scott A. Miller, Andris Freivalds

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


A model for predicting the incidence rate of carpal tunnel syndrome (CTS) for a given job, was developed using known biomechanical data, mechanical properties of human tendons and reliability engineering techniques to simplify the problem. In addition, time-dependent stress-strength interference theory was used to quantify the stress on the tendons during a job cycle, based on wrist position and grip strength and to estimate the tendon failure rate (or CTS incidence) for a given job. Higher failure probabilities were predicted for greater wrist deviations, for higher grasp forces, for females as compared to males, for wrist extension as compared to wrist flexion, and for two-fingered pinches as compared to four-fingered grasps. The predictions closely matched previously reported CTS incidence rates for a poultry thigh boning task.

Original languageEnglish (US)
Pages (from-to)447-457
Number of pages11
JournalInternational Journal of Industrial Ergonomics
Issue number6
StatePublished - Jun 1995

All Science Journal Classification (ASJC) codes

  • Human Factors and Ergonomics
  • Public Health, Environmental and Occupational Health


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