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Table 3 Unadjusted conditional logistic regression analyses assessing the association between antibiotic exposure and food allergy diagnosis

From: Antibiotic prescription and food allergy in young children

Variable Reference Unadjusted analyses
Odds Ratio 95 % CI p value
Primary independent variable
 Antibiotic exposure during 1st year of life No antibiotics 1.22 1.08–1.37 0.001
Child factors
 Breastfed Non-breastfed 1.31 1.57–1.48 <0.001
 NICU admission Routine birth 0.98 0.77–1.25 0.90
 Gestational age By weeks 1.03 1.00–1.06 0.06
 WIC enrollment Not enrolled 1.06 0.91–1.23 0.46
 Asthma, wheeze, or atopic dermatitis Absence of these conditions 5.07 4.44–5.79 <0.001
Maternal factors
 Smoking status (pre-pregnancy) Non-smoking status 0.85 0.72–0.99 0.03
 Smoking status (during pregnancy) Non-smoking status 0.81 0.69–0.96 0.01
 Maternal age By decade 1.16 1.05–1.30 <0.01
 Diabetes (gestational) No diabetes 0.98 0.74–1.30 0.89
 Diabetes (pre-pregnancy) No diabetes 2.10 1.33–3.31 0.001
 Urban residence Rural residence 1.16 1.02–1.32 0.02
Labor and delivery factors
 Vaginal birth Caesarian birth 0.89 0.79–1.00 0.05
 Antibiotics received due to abnormal conditions at birth No antibiotics 1.08 0.78–1.49 0.63
 Antibiotics during childbirth No antibiotics 1.10 0.95–1.27 0.19
 Steroids during childbirth No steroids 0.59 0.28–1.25 0.17