. 2020 Nov 19;100(2):1205–1212. doi: 10.1016/j.psj.2020.11.013

Table 4.

Mean and SD for jejunum and ileum length and density from 7 to 50 d of age (N = 12 for each line).

Trait	Age (d)	D⁺ mean (±SD)	D⁻ mean (±SD)	D+/D− ratio (%)	Line effect
Jejunum density (g.cm⁻¹)	0	ND	ND	ND	ND
	7	0.11 ± 0.02	0.13 ± 0.03	−15.4	0.0093
	14	0.15 ± 0.02	0.21 ± 0.03	−28.6	<0.0001
	23	0.25 ± 0.05	0.29 ± 0.03	−13.8	0.0091
	35	0.32 ± 0.05	0.43 ± 0.08	−25.6	0.0020
	50	0.41 ± 0.10	0.49 ± 0.11	−16.3	0.050
Ileum density (g.cm⁻¹)	0	ND	ND	ND	ND
	7	0.07 ± 0.01	0.09 ± 0.02	−22.2	0.0051
	14	0.12 ± 0.02	0.14 ± 0.02	−14.3	0.020
	23	0.18 ± 0.03	0.21 ± 0.04	−14.3	0.024
	35	0.24 ± 0.04	0.29 ± 0.07	−17.2	0.049
	50	0.32 ± 0.06	0.37 ± 0.09	−13.5	0.13

Abbreviation: ND, not determined.