Does a Reported Penicillin Allergy Affect Outcomes Following Elective Posterior Lumbar Fusions?

Article Figures & Data

Table 1

Baseline demographics of the study population.

Demographics	Patient-Reported Penicillin Allergy (n = 7497)	No Penicillin Allergy (n = 278,545)	P Value
Age, y			0.410
<65	1662 (22.2%)	63,023 (22.6%)
65–69	2025 (27.0%)	76,403 (27.4%)
70–74	1751 (23.4%)	63,639 (22.8%)
75–79	1233 (16.4%)	44,822 (16.1%)
80–84	598 (8.0%)	21,402 (7.7%)
≥85	164 (2.2%)	6355 (2.3%)
Gender			<0.001
Male	2041 (27.2%)	105,212 (37.8%)
Female	5392 (71.9%)	170,432 (61.2%)
Unknown	64 (0.9%)	2901 (1.0%)
Region			<0.001
Midwest	1463 (19.5%)	72,523 (26.0%)
Northeast	792 (10.6%)	36,314 (13.0%)
South	3673 (49.0%)	122,287 (43.9%)
West	1567 (20.9%)	47,406 (17.0%)
Unknown	2 (<0.1%)	15 (<0.1%)
Elixhauser Comorbidity Index, mean ± SD	4.9 ± 2.0	4.7 ± 2.0	<0.001

Table 2

Ninety-day outcomes between PA and non-PA patient populations.

Table 3

Inpatient charges and reimbursements between PA and non-PA patient populations.

Factor	PA, Mean ± SD	No PA, Mean ± SD	Risk-Adjusted Marginal Cost (Ref: No PA)	P Value
Inpatient charges	$87,565 ± $53,290	$81,385 ± $51,222	+$4340 (SE: 583)	<0.001
Inpatient reimbursements	$22,891 ± $8931	$21,587 ± $8827	$1221 (SE: 100)	<0.001