Table 6.

Pairwise correlation matrix, antimicrobial use indicators in broiler chicken flocks (n =831).

ROUTINE CIPARS AMU ANALYSIS
	Mean	Standard error of the mean	95% Confidence intervals
${\text{mg/PCU}}_{\text{Br}}^{(\text{CIPARS})}$	150	4	142–159
nDDDvetCA/1,000 broiler chicken-days at risk (CIPARS)	570	13	545–595
${\text{nDDDvetCA/PCU}}_{\text{Br}}^{(\text{CIPARS})}$	20	0.5	19–21
PAIRWISE CORRELATION MATRIX
	${\text{mg/PCU}}_{\text{Br}}^{(\text{CIPARS})}$	nDDDvetCA/1,000 broiler chicken-days at risk (CIPARS)	${\text{nDDDvetCA/PCU}}_{\text{Br}}^{(\text{CIPARS})}$
${\text{mg/PCU}}_{\text{Br}}^{(\text{CIPARS})}$	1
nDDDvetCA/1,000 broiler chicken-days at risk (CIPARS)	0.7039*	1
${\text{nDDDvetCA/PCU}}_{\text{Br}}^{(\text{CIPARS})}$	0.7503*	0.9667*	1
ALTERNATE AMU ANALYSIS
	Mean	Standard error of the mean	95% Confidence intervals
${\text{mg/kg}}_{\text{Br}}^{(\text{ALT})}$	73	2	70
nDDDvetCA/1,000 broiler chicken-days at risk (ALT)	284	6	271
${\text{nDDDvetCA/kg}}_{\text{Br}}^{(\text{ALT})}$	10	0.2	9
PAIRWISE CORRELATION MATRIX
	${\text{mg/kg}}_{\text{Br}}^{(\text{ALT})}$	nDDDvetCA/1,000 broiler chicken-days at risk (ALT)	${\text{nDDDvetCA/kg}}_{\text{Br}}^{(\text{ALT})}$
${\text{mg/kg}}_{\text{Br}}^{(\text{ALT})}$	1
nDDDvetCA/1,000 broiler chicken-days at risk (ALT)	0.6878*	1
${\text{nDDDvetCA/kg}}_{\text{Br}}^{(\text{ALT})}$	0.7000*	0.9638*	1

Analysis excluded flocks which were intentionally raised without antibiotics under designated programs for mainstream market such as “Raised without Antibiotics,” “Antibiotic-Free,” and organic.

CIPARS—Canadian Integrated Program for Antimicrobial Resistance Surveillance.

^(CIPARS)Based on routine formula used by CIPARS.

^(ALT)kg broiler chicken live pre-slaughter weights, alternate estimation methods.

nDDDvetCA—number of defined daily doses for animals using Canadian standards.

PCU—population correction unit (based on the European Surveillance for Veterinary Antimicrobial Consumption average weight at treatment for broiler chickens at 1 kg).

Br—broilers.

^*P < 0.0001, Pearson correlation coefficient.