Data analysis
Descriptive statistics were calculated for continuous and categorical variables, as medians with interquartile ranges and frequencies, respectively. We assessed associations between LUS results and patient characteristics (see Table 1) using univariate analysis (T-test for continuous variables and Fisher’s exact test for binary variables). Because some of the participants were seen at the clinic for an MCT in order to test for possible asthma, we felt they may have different characteristics compared to patients who were seen in follow up for their asthma control. Thus, we carried out a sub-analysis in both groups, those known to be asthmatic and those who came for an MCT to test for asthma.
P-values <0.05 were considered significant. Data were analyzed with SPSS statistics (version 23; IBM, Armonk, NY).