Enhanced oral care reduced hospital-acquired pneumonia in randomized trial

“Providing oral care in hospitals is often deprioritized in busy environments."

By
Meg Barbor
August 17, 2026
4 min

MDSpire News

Overview

The HAPPEN trial demonstrated that an enhanced oral-care program significantly reduced non-ventilator hospital-acquired pneumonia (NV-HAP) among hospitalized adults. The intervention was associated with a 60% lower hazard of NV-HAP compared to standard care, based on the study results.

Background

Non-ventilator hospital-acquired pneumonia (NV-HAP) is a prevalent healthcare-associated infection that can lead to increased morbidity and healthcare costs. Effective oral care is recognized as a crucial preventive strategy, yet high-quality evidence supporting its efficacy in hospital settings has been limited. The HAPPEN trial addresses this gap by evaluating an enhanced oral-care program's impact on NV-HAP rates.

Data Highlights

Condition	Control	Intervention
Patients with NV-HAP	46 (1%)	32 (0.7%)
Oral-care protocol completion	473 of 2,988 (15.8%)	1,727 of 2,791 (61.9%)

Key Findings

The intervention reduced NV-HAP by 60% (hazard ratio 0.40; 95% CI, 0.19–0.82).
NV-HAP was confirmed in 78 patients overall during the study.
Only 15.8% of patients completed the oral-care protocol under control conditions compared to 61.9% under the intervention.
No adverse events were reported during the study.
The intervention involved dedicated research nurses providing support and education.

Clinical Implications

The findings suggest that enhancing oral care in hospital settings can significantly reduce the incidence of NV-HAP. Hospitals may need to prioritize oral care as part of infection prevention strategies.

Conclusion

The HAPPEN trial provides robust evidence that improved oral care can effectively reduce NV-HAP rates, highlighting the importance of implementing such interventions in hospital settings.