title: Wellness coaching and health-related quality of life: a case-control difference-in-differences analysis.
abstract: OBJECTIVE
  Association between wellness coaching and changes in health-related quality of life over 1 year and 2 years was assessed.
  
  
  METHODS
  Difference-in-differences analysis of covariance assessed association between coaching and change in 8-item short-form health survey (SF-8) summary scores. Ordered logistic models assessed coaching and change in SF-8 individual domain scores. This was a case-control study.
  
  
  RESULTS
  Participants in at least one coaching program were more likely to have increases in social functioning after 1 year and less likely to have increases in role physical after 2 years. Participants in nutrition coaching had more positive change in mental component summary scores after 1 year. Participants in stress management had more negative change in mental component summary scores after 1 year and after 2 years and had more negative change in physical component summary scores after 2 years.
  
  
  CONCLUSIONS
  Findings were mixed regarding association between coaching and change in health-related quality of life.
authors.affiliation: College of Pharmacy, and Regenstrief Center for Healthcare Engineering, Center for Health Outcomes Research and Policy, Purdue University, West Lafayette, IN, USA.
authors.forename: Jyothi
authors.initials: J
authors.lastname: Menon
authors.forename: Mindy
authors.initials: M
authors.lastname: Paulet
authors.forename: Joseph
authors.initials: J
authors.lastname: Thomas
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D004032:Diet / Q000523:psychology; D005260:Female; D006293:Health Promotion; D006304:Health Status; D006306:Health Surveys; D006801:Humans; D016015:Logistic Models; D008297:Male; D008603:Mental Health; D008875:Middle Aged; D011788:Quality of Life / Q000523:psychology*; D012189:Retrospective Studies; D013315:Stress, Psychological / Q000628:therapy*; D011795:Surveys and Questionnaires; D055815:Young Adult