title: Effort-reward imbalance and organisational injustice among aged nurses: a moderated mediation model.
abstract: OBJECTIVE
  To test the effort-reward imbalance model among older nurses, expanding it to include the moderation of overcommitment and age in the stress-health complaints relationship, mediated by organisational injustice.
  
  
  BACKGROUND
  The theoretical framework included the effort-reward imbalance, the uncertainty management and the socio-emotional selectivity models.
  
  
  METHODS
  Employing a two-wave design, the participants were 255 nurses aged 45 years and over, recruited from four large hospitals in Spain (Madrid and Basque Country).
  
  
  RESULTS
  The direct effect of imbalance on health complaints was supported: it was significant when overcommitment was low but not when it was high. Organisational injustice mediated the influence of effort-reward imbalance on health complaints. The conditional effect of the mediation of organisational injustice was significant in three of the overcommitment/age conditions but it weakened, becoming non-significant, when the level of overcommitment was low and age was high.
  
  
  CONCLUSIONS
  The study tested the model in nursing populations and expanded it to the settings of occupational health and safety at work.
  
  
  CONCLUSIONS
  The results of this study highlight the importance of effort-reward imbalance and organisational justice for creating healthy work environments.
authors.affiliation: National Distance Education University (UNED), Department of Social and Organizational Psychology, Madrid, Spain.
authors.forename: Gabriela
authors.initials: G
authors.lastname: Topa
authors.affiliation: Department of Education Sciences, University of Bologna, Bologna, Italy.
authors.forename: Dina
authors.initials: D
authors.lastname: Guglielmi
authors.affiliation: Department of Psychology, University of Bologna, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Depolo
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009726:Nurses / Q000523:psychology*; D016272:Occupational Health / Q000592:standards; D015279:Organizational Culture; D012044:Regression Analysis; D012935:Social Justice / Q000523:psychology; D013030:Spain; D013315:Stress, Psychological / Q000150:complications / Q000209:etiology / Q000523:psychology*; D011795:Surveys and Questionnaires; D016526:Workload / Q000523:psychology / Q000592:standards*
keywords: effort-reward imbalance; health complaints; nursing; occupational health; organisational injustice