Environmental hygiene and healthcare-associated infection: a time-series study based on generalized additive model.

OBJECTIVE

To quantitatively analyze the impact of environmental hygiene on the occurrence of healthcare-associated infection (HAI).

METHODS

Monitoring data of HAI and environmental hygiene from a tertiary first-class hospital from July 1, 2022, to December 31, 2024, were collected, and the impact of environmental bacterial colony forming unit (CFU) on the occurrence of HAI was analyzed by a time-series generalized additive model (GAM).

RESULTS

The single-contamination model showed a significant positive correlation between HAI and total colony count, high-touch surface (HTS) colony count, and staff' hands colony count. The same pattern was observed in the multi-contamination model.

CONCLUSION

There is a significant correlation between environmental hygiene and the occurrence of HAI.