The last iteration of the Canadian census (2008) that included questions regarding marriage and divorce reports that approximately 40% of marriages in that year will end in divorce before the 30^th wedding anniversary. While only a proxy, the high divorce rate in Canada suggests a similarly high prevalence of relationship distress, a situation where one or both partners are dissatisfied with their intimate relationship and that is characterized by conflict. Relationship distress can result in higher levels of psychological and physical health concerns in both partners, in addition to health and social role impairments among children, other family members, co-workers and friends.

Recent studies have helped to identify that the association between relationship distress and negative health outcomes is cyclical. Not only does relationship distress lead to negative psychological health outcomes such as depression, anxiety and substance abuse, it can also result from situations where couples must respond to and cope with these concerns. Other contributors to relationship distress are varied and can include such experiences as the diagnosis of a terminal illness, living with chronic disease, living with mental health disorders, infidelity, unresolved childhood trauma, among others.

Couples therapy is widely practiced as a means to improve relationship distress, and is often an expected course of treatment when couples are faced with conflict. The main premise of is that guiding couples through their conflict as a collaborative team is more beneficial than working with only one member alone. While couples therapy is widely practiced, the effectiveness of couples therapy as an intervention to improve relationship distress is unclear. The purpose of this review is to summarize published research and evidence-based guidelines regarding the effectiveness of couples therapy for adults experiencing relationship distress from any cause.

Contents

• CONTEXT AND POLICY ISSUES
• RESEARCH QUESTIONS
• KEY FINDINGS
• METHODS
  • Literature Search Strategy
  • Selection Criteria and Methods
  • Exclusion Criteria
  • Critical Appraisal of Individual Studies
• SUMMARY OF EVIDENCE
  • Quantity of Research Available
  • Summary of Study Characteristics
  • Summary of Critical Appraisal
  • Summary of Findings
  • Limitations
• CONCLUSIONS AND IMPLICATIONS FOR DECISION OR POLICY MAKING
• REFERENCES
• APPENDIX 1 Selection of Included Studies
• APPENDIX 2 Other References of Potential Interest
• APPENDIX 3 Summary of Characteristics of Included Studies
• APPENDIX 4 Summary of Included Couples Therapy Interventions
• APPENDIX 5 Summary of Critical Appraisal of Included Studies
• APPENDIX 6 Summary of Findings of Included Studies

Disclaimer: The Rapid Response Service is an information service for those involved in planning and providing health care in Canada. Rapid responses are based on a limited literature search and are not comprehensive, systematic reviews. The intent is to provide a list of sources of the best evidence on the topic that CADTH could identify using all reasonable efforts within the time allowed. Rapid responses should be considered along with other types of information and health care considerations. The information included in this response is not intended to replace professional medical advice, nor should it be construed as a recommendation for or against the use of a particular health technology. Readers are also cautioned that a lack of good quality evidence does not necessarily mean a lack of effectiveness particularly in the case of new and emerging health technologies, for which little information can be found, but which may in future prove to be effective. While CADTH has taken care in the preparation of the report to ensure that its contents are accurate, complete and up to date, CADTH does not make any guarantee to that effect. CADTH is not liable for any loss or damages resulting from use of the information in the report.