Table 3.

Total performance^* -obtained by meta-analysis- of broilers fed diets containing specifics antibiotic growth promoters (AGP+) or not (AGP−).

	Treatments
Variable	AGP+	AGP−	P	SER	R2
Avilamycin
Feed intake, g/D	91	93	0.108	15.786	87.51
	(n:200)	(n:199)
Weight gain, g/D	54	53	0.248	8.952	82.47
	(n:219)	(n:218)
Feed conversion, g/g	1.63	1.71	<0.001	0.118	82.17
	(n:206)	(n:205)
Flavomycin
Feed intake, g/D	90	91	0.743	24.082	78.41
	(n:102)	(n:93)
Weight gain, g/D	51	51	0.622	9.921	78.13
	(n:104)	(n:95)
Feed conversion, g/g	1.72	1.76	0.037	0.312	67.39
	(n:102)	(n:93)
Virginiamycin
Feed intake, g/D	83	85	0.566	14.406	88.45
	(n:65)	(n:64)
Weight gain, g/D	49	47	0.042	9.117	78.77
	(n:70)	(n:69)
Feed conversion, g/g	1.68	1.75	0.015	0.165	76.63
	(n:65)	(n:64)

P: Probability of treatment effect. The models included the study effect (P < 0.001).

RSE: Residual standard error.

R²: Coefficient of determination of the model.

%: Percentage change between AGP+ and AGP−.

n: Number of studies observations in each mean.

^*The model considered the effect of the study (P < 0.001) and the mean weight of animals as adjusted variable (P < 0.001).