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Psychosocial mediators of dietary change among H ispanic/ L atina breast cancer survivors in a culturally tailored dietary intervention
Author(s) -
Shi Zaixing,
Richardson John M.,
Aycinena Ana Corina,
Gray Heewon L.,
Paul Rachel,
Koch Pam,
Contento Isobel,
Gaffney Ann Ogden,
Greenlee Heather
Publication year - 2018
Publication title -
psycho‐oncology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.41
H-Index - 137
eISSN - 1099-1611
pISSN - 1057-9249
DOI - 10.1002/pon.4799
Subject(s) - psychosocial , medicine , breast cancer , mediation , intervention (counseling) , randomized controlled trial , breastfeeding , gerontology , cancer , pediatrics , psychiatry , political science , law
Objective To examine psychosocial mediators of the effect of a culturally tailored dietary intervention on dietary change among Hispanic / Latina breast cancer survivors. Methods Hispanic/Latina breast cancer survivors (n = 70) were randomized to receive either a 12‐week theory‐based and culturally tailored dietary change program (intervention group, n = 34), or standard‐of‐care printed recommendations (control group, n = 36) ( ClinicalTrials.gov NCT01414062). Fruit/vegetable intake (F/V), % calories from fat, and hypothesized psychosocial mediators were assessed at baseline, 6 and 12 months. Analysis of covariance assessed intervention effects on psychosocial mediators at 6 and 12 months. Mediation analysis using the bootstrap method evaluated the indirect intervention effects on dietary intake at 6 and 12 months through changes in psychosocial mediators at 6 and 12 months. Results Compared with controls, at 6 and 12 months, the intervention group reported greater improvements in stages of change ( P < .001, P < .001, respectively), self‐efficacy ( P = .009, P = .002, respectively), snack preference for F/snack preference for F/V ( P = .045, P = .002, respectively); at 12 months, the intervention group reported a decrease in chance‐oriented external locus of control ( P = .02). At 6 months, mediation analysis showed that the intervention effect was associated with an increase of 1.0 (95% CI, −0.1‐2.4) serving/day of F/V, compared with the control group, although no indirect effect through the hypothesized psychosocial mediators was observed. At 12 months, the intervention was associated with an increase in 0.5 serving/day F/V through improved taste/snack preference for F/V at 6 and 12 months (95% CIs, 0.1‐1.3, 0.0‐1.4, respectively). Conclusions Future programs can target improving taste/snack preference for F/V to promote dietary change in Hispanic/Latina breast cancer survivors.