Table 2 Baseline clinical characteristics
From: Antibiotic prescription and food allergy in young children
Characteristic | Cases (n = 1504) | Controls (n = 5995) | p value |
|---|---|---|---|
Male, % | 55.9 | 55.8 | 0.98 |
Month of birth, % | |||
Jan | 8.58 | 8.56 | 1.00 |
Feb | 7.85 | 7.86 | |
Mar | 7.91 | 7.91 | |
Apr | 6.32 | 6.34 | |
May | 7.58 | 7.56 | |
Jun | 8.98 | 8.96 | |
Jul | 10.7 | 10.68 | |
Aug | 8.44 | 8.46 | |
Sep | 10.04 | 10.06 | |
Oct | 7.78 | 7.77 | |
Nov | 6.38 | 6.41 | |
Dec | 9.44 | 9.46 | |
Year of birth, % | |||
2007 | 25.9 | 25.9 | 1.00 |
2008 | 33.4 | 33.5 | |
2009 | 40.7 | 40.6 | |
Race/ethnicity, % | |||
Caucasian | 42.6 | 42.7 | 1.00 |
AA | 40.5 | 40.6 | |
Hispanic | 8.8 | 8.8 | |
American Indian | 0.1 | 0.1 | |
Asian | 0.5 | 0.5 | |
Unknown | 7.3 | 7.2 | |
Other | 0.2 | 0.1 | |
Birth weight, gramsa | 3168.1 | 3133.5 | 0.06 |
Asthma, % | 8.4 | 2.0 | <.001 |
Atopic dermatitis, % | 32.8 | 6.7 | <.001 |
Wheeze, % | 17.1 | 7.3 | <.001 |
Vaginal birth, % | 60.0 | 62.6 | 0.05 |
Breastfeeding at hospital discharge, % | 56.3 | 49.7 | <.001 |
WIC status, % | 80.6 | 79.7 | 0.42 |
NICU admission, % | 6.6 | 6.7 | 0.94 |
Tobacco pre-pregnancy, % | 17.4 | 19.7 | 0.04 |
Tobacco during pregnancy, % | 14.0 | 16.5 | 0.02 |
Urban residence, % | 74.2 | 71.2 | 0.02 |
Gestational age, weeksa | 38.3 | 38.2 | 0.07 |
Maternal age, yearsa | 24.5 | 24.1 | 0.01 |
Diabetes (gestational), % | 4.6 | 4.5 | 0.91 |
Diabetes (pre-pregnancy), % | 2.1 | 1.0 | 0.001 |
Antibiotics during labor/delivery, % | 22.8 | 21.0 | 0.13 |
Antibiotics received due to abnormal conditions at birth, % | 3.6 | 3.3 | 0.65 |
Steroids during childbirth, % | 0.6 | 0.9 | 0.21 |