Table 1: Demographic profile of subjects.

Factors/variablesTotal ( )Control ( , 66%)Asthma ( , 34%) value

Demographic variables
Gender0.28
 Female58 (43%)41 (46%)17 (37%)
 Male76 (57%)47 (54%)29 (63%)
Age: mean (SD)6.32 (2.9)6.1 (2.9)6.8 (2.9)0.18
Ethnicity0.95
 White96 (62%)55 (67%)41 (65%)
 Others49 (37%)27 (33%)22 (35%)
BMI: mean (SD)18.5 (5.3)17.8 (4.3)19.6 (5.9)0.08

For quantitative variables, data are presented as mean ± standard deviation (SD). BMI: body mass index; for categorical variables, data are presented as count number (column percentage). values are obtained by either two-sample -test or chi-square test, depending on the type of variables.