Table 2. Multivariate Logistic Regression Models of the Association Between Antimicrobial Exposures and Lymphopenia.

Antimicrobial exposure	Patients, No.	Odds ratio (95% CI)	P value
Antimicrobial agents, No.^a
0	302	1 [Reference]
1-3	164	0.78 (0.53-1.12)	.18
≥4	136	1.96 (1.26-3.07)	.006
Duration of antimicrobial exposure, d^a
0	306	1 [Reference]
1-3	163	0.80 (0.54-1.17)	.25
≥4	133	1.70 (1.10-2.57)	.005

^{^a}

Adjusted for tumor grade and age at diagnosis.