Table 5.

Descriptive statistics for the traits in each study and the overall dataset

Trait	Studya	N	Mean	SD
Protein efficiency	Bee et al. [26]	48	0.34	0.04
	Bee et al. [27]	48	0.39	0.04
	Present study	681	0.40	0.03
	Overallb	1071	0.39	0.04
Phosphorus efficiency	Bee et al. [26]	48	0.37	0.04
	Bee et al. [27]	48	0.40	0.03
	Present study	681	0.42	0.03
	Overallb	1071	0.43	0.05
FCR	Bee et al. [26]	48	2.54	0.15
	Bee et al. [27]	48	2.59	0.11
	Present study	681	2.76	0.14
	Overallb	1071	2.67	0.23
ADG	Bee et al. [26]	48	0.95	0.06
	Bee et al. [27]	48	0.94	0.07
	Present study	681	0.84	0.11
	Overallb	1071	0.85	0.11
ADFI	Bee et al. [26]	48	2.40	0.19
	Bee et al. [27]	48	2.44	0.18
	Present study	681	2.32	0.26
	Overallb	1071	2.26	0.31

^aDescriptive statistics for the data of Kasper et al. [28] is reported in the study of Kasper et al. [7]

^bDescriptive statistics for “Overall” also includes the data from Kasper et al. [7]

N—sample size