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Table 1 Determinants of the presence of mcr-1 in Dutch retail chicken meat samples, 2015

From: High prevalence of the mcr-1 gene in retail chicken meat in the Netherlands in 2015

Determinant Samples
n = 214
mcr-1 PCR positive
n (%)
OR (95% CI) Adjusted OR (95%CI)
Labelling as free-range
 Yes 70 10 (14.3) reference reference
 No 144 43 (29.8) 2.6 (1.2-5.5) 3.0 (1.3-6.6)
Supermarket chain
 A 53 1 (1.9) reference reference
 B 53 10 (18.9) 12.1 (1.5-98.3) 12.5 (1.5-101.8)
 C 54 21 (38.9) 33.1 (4.2-257.8) 34.6 (4.4-272.0)
 D 54 21 (38.9) 33.1 (4.2-257.8) 37.5 (4.8-295.3)
Country of origina
 NL 67 21 (30.3) 2.9 (1.3-6.5)  
 GER 44 19 (43.2) 4.8 (2.0-11.4)  
 DEN 9 1 (11.1) 0.8 (0.1-6.9)  
 NL/GER 80 11 (13.8) reference  
 NL/GER/BE 12 0 (0.0) not applicable  
 Unknown 2 1 (50.0) 6.3 (0.4-107.8)  
  1. a NL The Netherlands, GER Germany, DEN Denmark, BE Belgium