title: Current and maintained health-enhancing physical activity in rheumatoid arthritis: a cross-sectional study.
abstract: OBJECTIVE
  To describe and identify the explanatory factors of variation in current and maintained health-enhancing physical activity (HEPA) in persons with rheumatoid arthritis (RA).
  
  
  METHODS
  In this cross-sectional study, current HEPA was assessed with the International Physical Activity Questionnaire and maintained HEPA with the Exercise Stage Assessment Instrument, the latter explicitly focusing on both aerobic physical activity and muscle strength training. Sociodemographic, disease-related, and psychosocial data were retrieved from the Swedish Rheumatology Quality (SRQ) registers and a postal questionnaire. The explained variations in the respective HEPA behaviors were analyzed with logistic regression.
  
  
  RESULTS
  In all, 3,152 (58.5%) of 5,391 persons identified as eligible from the SRQ registers responded to the questionnaire. Current HEPA was reported by 69%, and maintained HEPA by 11% of the respondents. The most salient and consistent factors explaining variation in both current and maintained HEPA were self-efficacy, social support, and outcome expectations related to physical activity.
  
  
  CONCLUSIONS
  To our knowledge, this is the first study exploring maintained physical activity in a large well-defined sample of persons with RA. Our results indicate that a minority perform maintained HEPA, including both aerobic physical activity and muscle strength training, and that psychosocial factors are the most salient and consistent in the explanation of HEPA variation.
authors: Karolinska Institutet, Stockholm, Sweden. ingrid.demmelmaier@ki.se
authors: Ingrid
authors: I
authors: Demmelmaier
authors: Patrick
authors: P
authors: Bergman
authors: Birgitta
authors: B
authors: Nordgren
authors: Irene
authors: I
authors: Jensen
authors: Christina H
authors: CH
authors: Opava
mesh_terms: D000293:Adolescent; D000328:Adult; D001172:Arthritis, Rheumatoid / Q000175:diagnosis / Q000503:physiopathology* / Q000523:psychology; D016009:Chi-Square Distribution; D003430:Cross-Sectional Studies; D015444:Exercise; D005260:Female; D015438:Health Behavior; D007722:Health Knowledge, Attitudes, Practice; D006304:Health Status; D006305:Health Status Indicators; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D015999:Multivariate Analysis; D053580:Muscle Strength; D018482:Muscle, Skeletal / Q000503:physiopathology*; D016017:Odds Ratio; D012042:Registries; D055070:Resistance Training; D020377:Self Efficacy; D012944:Social Support; D011795:Surveys and Questionnaires; D013548:Sweden; D013997:Time Factors; D055815:Young Adult