It can be a simple and low-cost tool that could aid caregivers in vocal health clinics in tailoring therapies for patients with low spirometer measures, the researchers noted.
The spirometer measures how much and how fast the person can breathe out, which tells doctors whether their airways are narrowed or filled with mucous.
The study used a spirometer (a device that can measure lung function), and in some cases, additional allergy tests, on around 650 children who had been previously diagnosed with asthma.
