PMC:4161609 / 9278-10095 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/4161609","sourcedb":"PMC","sourceid":"4161609","source_url":"https://www.ncbi.nlm.nih.gov/pmc/4161609","text":"The data were analyzed using SPSS software (IBM Japan, Tokyo, Japan). FeNO was analyzed as a continuous variable. Answers to the questionnaire were dealt with as discrete variables. The differences between the mean FeNO values of two categorical independent groups were determined using an unpaired t-test (Student’s t-test or Welch’s t-test), after the equality of variances was assessed by Levene’s test. Correlations of two variables were calculated using Spearman’s rank correlation coefficient, because the variables did not show a normal distribution and some of them were discrete. Multiple regression analysis was performed to determine the multiple regression function, and the standardized partial regression coefficients were calculated to compare the strengths of two factors that affected a third factor.","tracks":[]}