Fig. 2From: The impact of nasal aspiration with an automatic device on upper and lower respiratory symptoms in wheezing children: a pilot case-control studySalbutamol consumption (expressed in percentage of days) among patients using a DuoBaby nebulizer equipped (cases, n = 43) or not equipped (controls; n = 46) with an nasal aspirator. Percentage are calculated considering the total days with symptoms over the total day of reported days (see method for definition). Chi-squared test was used to evaluate frequency differences between independent groupsBack to article page