Nudging Hospital Visitors Towards Stair Use, in Greece.

Stair use is a physical activity that can be easily incorporated into daily routines, offering numerous health benefits. Nudges are increasingly adopted in public health interventions to promote healthy behaviours, such as physical activity. This study aimed to investigate the effectiveness of nudge-based posters in increasing stair use among hospital visitors in Athens, Greece. The posters were placed at the point-of-choice between stairs and elevators. Hospital visitors using either the stairs or elevators were observed across five phases, namely, baseline, two intervention phases, and two post-intervention phases, each lasting four days. A total of 3,071 choices between the stairs and the elevator were recorded during the study. The differences in proportions of stair users between stages was assessed using the Chi-square test. The results showed that the posters significantly increased stair use from 22.6% at baseline to 37.3% during the first intervention phase. Stair use dropped back to 22.2% during the first post-intervention phase. During the second intervention, stair use rising to 37.8%, followed by a decrease to 22.8% in the second post-intervention phase. These findings suggest that posters placed at the point-of-choice can effectively promote immediate behavioural changes, increasing stair use among hospital visitors. However, their long-term effect has yet to be verified. The simplicity, low cost, and easy applicability of posters make them a promising nudge-based intervention within hospital settings. These characteristics also support the generalization of this approach to other environments as part of public health policies aimed at promoting physical activity and improving overall population health.