Accepted for/Published in: Journal of Medical Internet Research
Date Submitted: Aug 9, 2023
Date Accepted: Mar 1, 2024
Warning: This is an author submission that is not peer-reviewed or edited. Preprints - unless they show as "accepted" - should not be relied on to guide clinical practice or health-related behavior and should not be reported in news media as established information.
Pasos Hacia La Salud II: six-month outcomes of a randomized controlled trial of a theory- and technology-enhanced physical activity intervention for Latina women
ABSTRACT
Background:
Nearly half (47.8%) of Latinas report never engaging in any PA, and frequently cite time, childcare and transportation as barriers to PA. In addition to linguistic adaptations for this population, successful PA interventions for Latinas addressed these barriers through remote intervention delivery approaches (e.g., mail, phone, or web-delivered).
Objective:
To evaluate 6-month outcomes of a randomized trial comparing a Spanish-language individually-tailored, website-delivered physical activity (PA) intervention (Original); to an enhanced version with text messages, and data-driven content (Enhanced). Further, we evaluate if increases in PA at 6 months were moderated by baseline activity status.
Methods:
Latina women age 18-65 participated in a trial comparing the efficacy of the enhanced versus original intervention at initiating PA behavior change, we examined min/week of accelerometer-measured PA in the Enhanced vs. Original arms, and proportion of each arm meeting aerobic PA guidelines of 150 minutes/week at 6 months. For moderator analyses, participants were classified as inactive (0 min/week) or low active (1-90 min/week) at baseline, measured via 7 Day PAR interview.
Results:
Among 195 participants enrolled; PA increased from 19.7 mins/week (SD=47.9) at baseline to 46.9 (SD=66.2) at 6m in the Enhanced arm vs. 20.6 (SD=42.7) to 42.9(SD=78.2) in the Original arm (P=.78). Overall, 30% of the Enhanced group met aerobic PA guidelines at 6m, compared to 21% of the Original group (p>0.05). Baseline PA (inactive vs. low active) moderated treatment effects on PA. For inactive participants, there were no group differences at six months (b=7.1, SE=22.8, P=.75), while low active participants increased more in Enhanced than Original (b=72.5, SE=27.9, P=.01). For low-active participants, 45% of the Enhanced group met PA guidelines at 6m, vs. 20% of the Original arm; OR=3.3). For inactive participants, there were no group differences (24% vs. 21% for Enhanced vs. Original, OR=1.28).
Conclusions:
Intervention effects were conditional on baseline PA. For low-active Latinas, the enhanced intervention was more effective at increasing PA. Additional tailored intervention enhancements may be necessary to increase PA for inactive Latinas. Clinical Trial: NCT03491592
Citation
