Table 2.

Adjusted^* associations of antibiotic orders with milk allergy at different ages of diagnosis up to age 7 years

		Age at milk allergy diagnosis**
		Diagnosed up to 300 days (0.82 years)			Diagnosed after 300 days (0.82 years)			Diagnosed up to 7 years
	Antibiotic order count	Odds ratio	95% confidence interval		Odds ratio	95% confidence interval		Odds ratio	95% confidence interval
Milk allergy cases, with or without other allergy diagnoses†	1–2 vs. none	1.43	0.97	2.09	1.51	1.04	2.21	1.49	1.15	1.96
	3+ vs. none	2.39	1.25	4.59	1.66	1.11	2.49	1.78	1.28	2.48
Milk allergy cases excluding cases with another allergy diagnosis‡	1–2 vs. none	1.35	0.84	2.17	0.98	0.59	1.64	1.23	0.87	1.75
	3+ vs. none	3.65	1.75	7.60	1.03	0.61	1.74	1.54	1.01	2.37

^*Adjusted for Medical Assistance and race/ethnicity.

^†Includes milk allergy cases with and without diagnoses of other allergies: < 301 days includes 279 cases vs. 1395 controls; >300 days includes 205 cases vs. 1025 controls; diagnosed up to 7 years includes 484 cases vs. 2420 controls.

^‡Excludes cases with a diagnosis of another allergy: < 301 days includes 200 cases vs. 1000 controls; >300 days includes 114 cases vs. 570 controls; diagnosed up to 7 years includes 314 cases vs. 1570 controls.