Effectiveness of a worksite lifestyle intervention to reduce BMI among farmworkers in California: a cluster randomised controlled trial

Objective: To evaluate the effectiveness of PASOS SALUDABLES, a culturally tailored lifestyle intervention to prevent obesity and diabetes among Latino farmworkers, when implemented at large scale in the worksite. Design: This study was a two-arm parallel group, cluster randomised controlled trial, where participants received either a twelve-session lifestyle intervention (intervention) or six-session leadership training (control) at their worksite. The intervention was delivered by Promotoras in Spanish. All sessions were conducted at the worksites (ranches) during meal breaks. Blinded, trained research assistants collected socio-demographic and outcome data (i.e. BMI as primary outcome and waist circumference, glycated Hb (HbA1c), cholesterol and blood pressure as secondary outcomes) at baseline and follow-up assessments (i.e. 3 months, 6 months, 1 year and 1 center dot 5 years). Setting: Recruitment and intervention delivery occurred at twelve study ranches in Oxnard, California. Participants: We enrolled farmworkers hired by a large berry grower company, who were >= 18 years old, spoke Spanish and were free of diabetes at screening. Results: A total of 344 workers were enrolled in the intervention and 271 in the control group. The intervention resulted in attenuated increase of BMI over time; however, the difference in trend between groups was not significant (beta = -0 center dot 01 for slope difference, P = 0 center dot 29). No significantly different trend by group was observed in secondary outcomes (P > 0 center dot 27). Conclusions: The worksite intervention, implemented during meal breaks, did not reduce BMI or other clinical indicators. Nevertheless, this study supports the feasibility of recruiting and engaging the Latino farmworker population in workplace health promotion interventions.

Automated summary

The study aimed to evaluate the effectiveness of the PASOS SALUDABLES program in preventing obesity and diabetes among Latino farmworkers when implemented at a large scale in the worksite. The results showed that while the intervention group demonstrated a slowed increase in BMI over time, the difference compared to the control group was not significant, and there were no significant differences in other clinical indicators between the two groups.