title: Predictors of adherence to a 26-week viniyoga intervention among post-treatment breast cancer survivors.
abstract: OBJECTIVE
  This study aimed to identify demographic, psychological, health-related, and geographic predictors of adherence to home-based and supervised components of a yoga intervention in breast cancer survivors.
  
  
  METHODS
  Participants were the 32 post-treatment breast cancer survivors who were randomized to the Viniyoga intervention arm of a controlled trial. Participants were asked to practice yoga 5 times per week for 6 months, including at least one weekly facility-based session. Adherence was monitored using sign-in sheets and logs. Height and weight were measured; other potential predictors of adherence were obtained from baseline questionnaires.
  
  
  RESULTS
  Participants attended 19.6±13.0 yoga classes and performed 55.8±32.8 home-based yoga sessions. Participants adhered to 58% of the overall yoga practice goal (75% of the goal for yoga classes and 54% of the goal for home based-sessions). Higher class attendance and home practice were predicted by greater self-efficacy for yoga (p=0.004 and 0.06, respectively). Additionally, employment outside the home was associated with greater class attendance (p=0.004), while higher waist circumference was marginally associated with lower adherence to home-based yoga (p=0.05).
  
  
  CONCLUSIONS
  High levels of facility- and home-based yoga practice were achieved. Breast cancer survivors who have lower self-efficacy for yoga or who have a higher waist circumference may benefit from additional support or intervention tailoring. Adherence may also be improved by ensuring that class times are convenient to both working and nonworking women.
authors.affiliation: 1 Moores UCSD Cancer Center, University of California , La Jolla, CA.
authors.forename: Lisa
authors.initials: L
authors.lastname: Cadmus-Bertram
authors.forename: Alyson J
authors.initials: AJ
authors.lastname: Littman
authors.forename: Cornelia M
authors.initials: CM
authors.lastname: Ulrich
authors.forename: Rachael
authors.initials: R
authors.lastname: Stovall
authors.forename: Rachel M
authors.initials: RM
authors.lastname: Ceballos
authors.forename: Bonnie A
authors.initials: BA
authors.lastname: McGregor
authors.forename: Ching-Yun
authors.initials: CY
authors.lastname: Wang
authors.forename: Jaya
authors.initials: J
authors.lastname: Ramaprasad
authors.forename: Anne
authors.initials: A
authors.lastname: McTiernan
mesh_terms: D000368:Aged; D001943:Breast Neoplasms / Q000523:psychology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D010349:Patient Compliance; D011788:Quality of Life; D017741:Survivors / Q000523:psychology*; D015013:Yoga