Limitation
HTN, obesity, overweight
OBESITY, HTN
This study has several limitations. First, because we did not collect data on the employers’ financial investment in the intervention, we were unable to assess the effect of money on changes in incidence of HTN between the intervention and control groups. Second, data were only collected at baseline and at the end of follow-up for the intervention and control groups, making it difficult to assess trends in outcome indicators during the intervention. Third, the extent to which the workplaces adopted the recommended interventions was not specific evaluated, even though the conditions had been improved based on the positive lifestyle changes. Fourth, this study was designed as open label, with the participants and other study investigators aware of intervention randomization. Therefore, blinded evaluation may not be feasible. We applied the outcome definition and assessment methods (the measurement of BP and definition of HTN) to minimize the subjective elements and ensure that results were as robust as possible despite the lack of blinding. In addition, significant differences of outcome variables, such as SBP, smoking, stress perception, overweight or obesity, and excessive intake of fatty food were observed between the intervention and control groups. This reminds us to be careful when interpreting and extrapolating the results. Finally, as a post hoc study of a randomized controlled trial, the statistical power could be insufficient. Since this was an exploratory research, a new trial specifically designed was needed to further answer this question.