Table 3

Severe Adverse Events (N = 1,531,019 Visits)

	With Antibiotics 1,002,050 Visits		Without Antibiotics 528,969 Visits
Time After Index Visit	No. ofEvent	Events Rate^a	No. of Event	Events Rate^a	Risk Difference^a	P Value
15 days	85	8.48	41	7.75	0 .73	.63
30 days	148	14.77	80	15.12	−0.35	.86

Note: The following events occurred at 15 days: hypersensitivity 44, diarrhea 18, liver toxicity 13, renal toxicity 21, arrhythmia 6, seizure 23; at 30 days, hypersensitivity 79, diarrhea 25, liver toxicity 28, renal toxicity 39, arrhythmia 11, seizure 46.

↵a Per 100,000 visits.