Table 2:

Odds ratios of antibiotic resistance.

Antibiotic	Odds Ratio of Resistance Polymicrobial v. Monomicrobial	p-value	Odds Ratio of Resistance for Each Additional Species	p-value
Penicillins
Ampicillin	1.37 (1.10, 1.70)	0.005*	1.14 (1.05, 1.24)	0.001*
Combinations
Amoxicilin/Clavulanate	1.38 (1.09, 1.74)	0.008*	1.16 (1.07, 1.26)	0.0005*
Ampicillin/Sulbactam	1.13 (0.89, 1.42)	0.32	1.05 (0.96, 1.14)	0.30
Trimethoprim/Sulfamethoxazole	1.09 (0.88, l.37)	0.43	0.98 (0.91, 1.07)	0.69
Piperacillin/TazobactBm	0.69 (0.43, 1,11}	0.12	0.75 (0.51, 0.94)	0.010*
Cephalosporins
Cefaclor	1.42 (1.15, 1.77)	0.001*	1.15 (1.06, 1.25)	0.0006*
Cefazolin	1.38 (1.11, 1.72)	0.004*	1.15 (1.07, 1 25)	0.0004*
Cefeprime	1.45 (1.16, 1.80	0.001*	1.12 (1.03, 1.21)	0.006*
Cefoxitin	1.41 (1.14, 1.76)	0.002*	1.10 (1.01, 1.19)	0.020*
Ceftazidime	1.31 (1.05, 1.62)	0.02*	1.07 (0.99, 1.15)	0.10
Caftriaxone	1.25 (1.01, 1.56)	0.04*	1.09 (1.01, 1.18)	0.03*
Carbapenams
Meropenem	1.28 (0.99, 1.65)	0.06	1.08 (0.99, 1.18)	0.10
Aminoglycosides
Gentamicin	1.17 (0.90, 1.51)	0.23	1.01 (0.92, 1.11)	0.78
Fluroroqinolones
Ciprofloxacin	1.20 (0.96, 1.51)	0.11	1.03 (0.95, 1.12)	0.45
Levofloxacin	1.20 (0.95, 1.53)	0.13	1.05 (0.97, 1.14)	0.25
Nilrofurans
Nitmiurantoin	1.03 (0.64, 1.65)	0.9	0.90 (0.74, 1.08)	0.25
Tetracyclines
Tetracyclines	1.26 (1.02, 1.57)	0.04*	1.11 (1.02, 1.20)	0.010*
Glycopeptides
Vancomycin	2.15 (1.63, 2.84)	<00001	1.38 (1.21, 1.56)	<0.0001

^*Significant p-value

The numbers in parentheses are 95% confidence interval bounds. Column 2 represents odds ratios of resistance for polymicrobial versus monomicrobial specimens. Column 4 presents odds ratios of resistance for each additional bacterial species in a specimen.