Relationship Between Teams’ Leader–Member Exchange Characteristics and Psychological Outcomes for Nurses and Nurse Managers: A Cross-Sectional Study in Japan

Introduction The Leader–Member Exchange (LMX) theory, based on the social exchange theory, relates to positive psychological states among nurses. However, the influence of various LMX qualities coexisting within a team on nurses or nurse managers is still uncleared. Objective This study examines the relationship of nurses and nurse managers’ psychological states with the average LMX and LMX dispersion among nurses in their units. Methods The study was conducted at two university hospitals in March 2017 using anonymous questionnaires. Nurses completed the LMX-7 scale and the subscales of job satisfaction, achievement, and growth from the Checklist on Commitments Related to Work. Nurse managers completed the subscales of management satisfaction, effectiveness, and extracting extra effort from the Multifactor Leadership Questionnaire. Both nurses and managers completed the Intention to Continue Working scale. The nurses’ data were analyzed using a multilevel analysis to clarify associations between nurses’ psychological states and LMX, average LMX, and LMX dispersion. Hierarchical multiple regression analysis tested to test the correlations of the psychological states of nurse managers with average LMX and LMX dispersion. Results Data from 586 nurses and 28 managers were analyzed. The LMX and average LMX of nurses were positively related to positive psychological states. Nurse managers displayed significant associations between high LMX dispersion and good psychological states. When average LMX was low, management effectiveness increased as LMX dispersion increased; when average LMX was high, management effectiveness was almost constant. Conclusion The unit’s LMX characteristics appear to be related to the psychological states of both nurses and nurse managers. Increasing the LMX of each nurse may lead to positive psychological states for not only that nurse but all nurses in the unit. When LMX with subordinates is low, increasing LMX with a portion of nurse managers should be a priority to improve their psychological states.