From confounders to suspected risk factors: psychosocial factors and work-related upper extremity disorders.

Psychosocial variables have recently been more prominent among epidemiologic risk factors for work-related upper extremity disorders (WRUEDs), but bio-behavioral mechanisms underlying these associations have been elusive. One reason is that the psychosocial domain has included many broad and disparate variables (e.g. mood, coping skills, job control, job satisfaction, job stress, social support), and this lack of specificity in the conceptualization of psychosocial factors has produced limited hypothesis testing opportunities. Therefore, recent research efforts have focused on identifying and conceptualizing specific psychosocial factors that might more clearly delineate plausible bio-behavioral mechanisms linking psychosocial factors to WRUEDs. One such factor is workstyle, a strategy that workers may employ for completing, responding to, or coping with job demands that might affect musculoskeletal health. Preliminary studies have provided support for measurable differences in workstyle among individual workers and an association with upper extremity pain and discomfort. An initial self-report measure of workstyle has been pilot tested among office workers and shown acceptable reliability and validity. Future studies are needed to study this construct among other working populations and to determine its relationship with other clinical endpoints. Nevertheless, early findings suggest workstyle may be a potential focus of WRUED prevention efforts.