Table 3.

Regression analysis for log₂(MIC) of chlorhexidine and isopropanol

Associated Factor	Chlorhexidine MIC (Log2µg/mL) ß (95% CI)	p-value	Isopropanol MIC (Log2 mg/mL) ß (95% CI)	p-value
Institution
INMP	Ref.		Ref
HNGAI	0.66 (−0.01, 1.32)	0.054†	−0.23 (−0.76, 0.29)	0.375
HN2M	0.53 (−0.31, 1.37)	0.210	−0.77 (−1.54, −0.01)	0.048‡
Fomites source	−0.22 (−1.01, 0.58)	0.588	−0.22 (−1.01, 0.58)	0.588
PFGE Type 4	0.51 (−0.26, 1.28)	0.191	−0.11 (−0.63, 0.41)	0.680
Carbapenemases	0.66 (−0.06, 1.38)	0.072†	−0.23 (−0.79, 0.32)	0.400
Colistin	−0.56 (−1.68, 0.56)	0.321	0.29 (−0.67, 1.25)	0.543
Imipenem	0.52 (−0.09, 1.13)	0.094†	−0.10 (−0.41, 0.61)	0.703
Meropenem	0.44 (−0.17, 1.06)	0.158	−0.15 (−0.66, 0.36)	0.547
PIP/TZB	0.45 (−0.16, 1.07)	0.147	−0.04 (−0.55, 0.48)	0.889
Chloramphenicol	−0.46 (−1.14, 0.23)	0.186	0.43 (−0.12, 0.98)	0.122
TMP/SMX	0.65 (0.03, 1.27)	0.041‡	−0.07 (−0.59, 0.44)	0.779
Nitrofurantoin	0.09 (−0.55, 0.75)	0.764	0.16 (−0.37, 0.69)	0.547
Aztreonam	−0.51 (−0.51, 0.81)	0.645	0.09 (−0.46, 0.63)	0.741
Ciprofloxacin	−0.68 (−1.56, 0.21)	0.132	−0.32 (−1.11, 0.47)	0.422
Levofloxacin	−0.60 (−1.23, 0.03)	0.061†	0.11 (−0.42, 0.64)	0.678
Cefotaxime	−0.02 (−0.74, 0.69)	0.946	−0.07 (−0.66, 0.52)	0.814
Ceftazidime	0.07 (−0.66, 0.81)	0.840	−0.03 (−0.63, 0.58)	0.934
AMC	0.38 (−0.30, 1.05)	0.270	−0.49 (−1.03, 0.06)	0.078
Gentamicin	0.48 (−0.15, 1.11)	0.129	−0.25 (−0.77, 0.27)	0.339

MIC, Minimal Inhibitory Concentration; INMP, Instituto Nacional Materno Perinatal; HNGAI, Hospital Nacional Guillermo Almenara Irigoyen; HN2M, Hospital Nacional Dos de Mayo; PFGE, pulsed field gel electrophoresis; PIP/TZB, piperacillin/tazobactam; TMP/SMX, trimethoprim/sulfamethoxazole; AMC, amoxicillin/clavulanate; ß, linear regression coefficient; 95% CI, 95% confidence interval; †, p value <0.10; ‡, p value <0.05