A randomized trial of a one-time pest intervention: impact on childhood asthma outcomes

Area of Science:

• Environmental Health
• Pediatric Asthma Management
• Epidemiology

Background:

• Persistent asthma in children is often exacerbated by household pest infestations, which are common triggers for allergic inflammation.
• Current medical management for severe childhood asthma may not adequately address environmental triggers like pests.
• Integrated Pest Management (IPM) is known to reduce allergen levels, but its impact on healthcare utilization and asthma symptoms needs evaluation.

Purpose of the Study:

• To assess the impact of a single apartment-level Integrated Pest Management (IPM) intervention on healthcare utilization among children with persistent asthma.
• To evaluate the effects of IPM on asthma symptoms, school absenteeism, and rescue medication use in children with pest-infested homes.
• To determine if IPM intervention leads to a reduction in pest infestation levels.

Main Methods:

• A randomized controlled trial involving 384 children aged 5-12 years with persistent asthma.
• Participants were assigned to either an Integrated Pest Management (IPM) intervention group (n=183) or a usual care (UC) group (n=197).
• Primary outcome: healthcare utilization via claims data. Secondary outcomes: asthma symptoms, pest levels, school days missed, and rescue medication use.

Main Results:

• No significant difference in healthcare utilization was observed between the IPM and UC groups.
• The IPM group experienced fewer days with reduced activity due to asthma (p=0.04) and showed non-significant trends toward improvement in asthma symptom days, severe symptoms, missed school days, and rescue medication use.
• Significant reductions in both cockroach and mouse infestations were observed in the IPM group compared to the UC group.

Conclusions:

• A one-time, apartment-level IPM intervention did not alter healthcare utilization but led to fewer days of reduced activity in children with persistent asthma.
• Suggestive evidence indicates clinically meaningful improvements in secondary asthma outcomes with IPM, supporting its role beyond traditional medical management.
• Findings support integrating home pest control strategies into the comprehensive management of severe childhood asthma, given the link between pests, allergens, and asthma exacerbations.