Table 4.

Association between reported penicillin allergy and other drug allergy status on healthcare visits

Healthcare Visits	Unadjusted		Adjusted modela		Adjusted modelb
	RR (95% CI)	P-value	RR (95% CI)	p-value	RR (95% CI)	P-value
Reported penicillin allergyc	1.12 (1.01, 1.24)	0.034	1.14 (1.04, 1.27)	0.008	1.13 (1.03, 1.25)d	0.014
Reported penicillin allergy with concurrent multiple drug intolerance syndromee	1.19 (1.06, 1.33)	0.002	1.22 (1.09, 1.36)	< 0.001	1.20 (1.08, 1.34)	< 0.001

^aAge, sex, race-adjusted

^bAge, sex, race, and charlson comorbidity index-adjusted.

^cThe reference group is patients without a reported penicillin allergy.

^dIn the sensitivity analysis excluding the 40 patients with penicillin gastrointestinal intolerance only, aRR 1.13 [95% CI 1.02, 1.25].

^eThe reference group is patients without penicillin allergy and multiple drug intolerance syndrome.