Variable Sex   Overall
Female Male
Number of Subjects (%)* 508 (42.55) 686(57.45) 1194 (100)
Race-ethnicity, n (%)
Caucasian 139 (27.36) 215 (31.34) 354 (29.65)
African American 279 (54.92) 350 (51.02) 629 (52.68)
Hispanic 70 (13.78) 93 (13.56) 163 (13.65)
Others/missing 20 (3.94) 28 (4.08) 48 (4.02)
Visit frequencies
Number of visits 8574 11785 20359
Mean (SE) 16.88 (0.32) 17.18 (0.28) 17.05 (0.21)
Pre-diagnosis visit frequencies
Number of visits 4105 5380 9485
Mean (SE) 8.08 (0.22) 7.84 (0.19) 7.94 (0.15)
Post-diagnosis visit frequencies      
Number of visits 4469 6405 10874
Mean (SE) 8.8 (0.28) 9.34 (0.25) 9.11 (0.19)
Age at Diagnosis (Yrs), mean (SE)* 2.01 (0.06) 1.81 (0.05) 1.90 (0.04)
Comorbidities, n (%)      
Atopy 28 (5.51) 42 (6.12) 70 (5.86)
Allergic rhinitis 249 (49.02) 318 (46.36) 567 (47.49)
Chronic conjunctivitis 10 (1.97) 15 (2.19) 25 (2.09)
Gastroesophageal reflux 134 (26.38) 204 (29.74) 338 (28.31)
  Race-Ethnicity
Variable Caucasian African American Hispanic
Visit frequencies**      
Number of visits 6867 10052 2660
Mean (SE) 19.40 (0.46) 15.98 (0.26) 16.32 (0.48)
Pre-diagnosis visit frequencies**      
Number of visits 3395 4516 1155
Mean (SE) 9.59 (0.34) 7.18 (0.16) 7.09 (0.30)
Post-diagnosis visit frequencies      
Number of visits 3472 5536 1505
Mean (SE) 9.81 (0.38) 8.80 (0.25) 9.23 (0.46)
Age at Diagnosis (years), mean (SE)* 2.04 (0.07) 1.82 (0.05) 1.80 (0.10)
Comorbidities, n (%)      
Atopy** 14 (3.95) 50 (7.95) 4 (2.95)
Allergic rhinitis 178 (50.28) 281 (44.67) 82 (50.31)
Chronic conjunctivitis 6 (1.69) 13 (2.07) 4 (2.45)
Gastroesophageal reflux** 121 (34.18) 177 (28.14) 29 (17.79)
Note: * 0.05 ≤ P<0.01; ** 0.01 ≤ P<0.001; SE, standard error.
Table 1: Patients characteristics.