. 2021 Feb 15;10(2):190. doi: 10.3390/antibiotics10020190

Table 3.

Pearson correlation coefficients for pairs of antibiotics to assess antibiotic-resistant E. coli isolates from fecal samples of migratory birds.

	Statistical Analysis	CIP	GEN	E	TE	CL	CTR	MEM	AMP	C	S
CIP	Pearson Correlation Coefficient	1
CIP	p-value (two-tailed)	-
GEN	Pearson Correlation Coefficient	0.123	1
GEN	p-value (two-tailed)	0.371	-
E	Pearson Correlation Coefficient	- ^a	- ^a	- ^a
E	p-value (two-tailed)	-	-	-
TE	Pearson Correlation Coefficient	0.694 ^‡	0.099	- ^a	1
TE	p-value (two-tailed)	0.000 *	0.471	-	-
CL	Pearson Correlation Coefficient	0.356 ^‡	0.065	- ^a	−0.342 ^†	1
CL	p-value (two-tailed)	0.008 *	0.639	-	0.011 *	-
CTR	Pearson Correlation Coefficient	- ^a	- ^a	- ^a	- ^a	- ^a	- ^a
CTR	p-value (two-tailed)	-	-	-	-	-	-
MEM	Pearson Correlation Coefficient	0.285 ^†	0.098	- ^a	-0.225	0.098	- ^a	1
MEM	p-value (two-tailed)	0.035 *	0.477	-	0.099	0.477	-	-
AMP	Pearson Correlation Coefficient	- ^a	- ^a	- ^a	- ^a	- ^a	- ^a	- ^a	- ^a
AMP	p-value (two-tailed)	-	-	-	-	-	-	-	-
C	Pearson Correlation Coefficient	0.717 ^‡	0.073	- ^a	0.589 ^‡	−0.308 ^†	- ^a	−0.246	- ^a	1
C	p-value (two-tailed)	0.000 *	0.598	-	0.000 *	0.022 *	-	0.070	-	-
S	Pearson Correlation Coefficient	0.261	0.063	- ^a	0.426 ^‡	−0.331 ^†	- ^a	−0.158	- ^a	0.178	1
S	p-value (two-tailed)	0.054	0.646	-	0.001 *	0.014 *	-	0.250	-	0.195	-

* A p-value less than 0.05 (p < 0.05) was deemed as significant; ^‡ correlation is significant at the 0.01 level (two-tailed); † correlation is significant at the 0.05 level (two-tailed); ^a cannot be computed because at least one of the variables is constant; CIP = ciprofloxacin; GEN = gentamicin; E = erythromycin; TE = tetracycline; CL = colistin; CTR = ceftriaxone; MEM = meropenem; AMP = ampicillin; C = chloramphenicol; S = streptomycin.