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. Author manuscript; available in PMC: 2021 Apr 1.
Published in final edited form as: Am J Manag Care. 2020 Apr;26(4):154–161. doi: 10.37765/ajmc.2020.42832

Table 3.

Unadjusted association of penicillin allergy and other drug allergy status on healthcare utilization

Incident Ratea All Patients Reported Penicillin Allergy Multiple Drug Intolerance Syndrome
(n = 1,895) Yes (n = 383) No (n = 1,512) P-valueb Yesc (n = 848) Noc
(n = 1047)		 P-valueb
Total number of visits 1.16 (0.01) 3.03 (0.05) 0.70 (0.01) <0 .001 2.05 (0.03) 0.44 (0.01) < 0.001
 Inpatient visits 0.06 (0.003) 0.09 (0.009) 0.05 (0.003) 0.24 0.11 (0.006) 0.03 (0.003) < 0.001
 Emergency visits 0.07 (0.004) 0.19 (0.01) 0.04 (0.003) 0.003 0.12 (0.007) 0.03 (0.003) < 0.001
 Outpatient visits 1.03 (0.014) 2.70 (0.05) 0.62 (0.01) < 0.001 1.80 (0.03) 0.41 (0.01) < 0.001
  Primary care 0.27 (0.007) 0.74 (0.03) 0.16 (0.006) < 0.001 0.43 (0.01) 0.15 (0.007) < 0.001
  Specialist 0.51 (0.01) 1.95 (0.04) 0.46 (0.010) < 0.001 1.29 (0.02) 0.32 (0.01) < 0.001
a

Patient visits that occurred between January 1, 2014 and December 31, 2016, displayed per follow-up year.

b

Unadjusted p-values determined using Poisson regression.

c

Patients with three or more drug allergies or intolerances.