Table V.

Associations between the identification of a lesion at enrollment using ultrasonography and average daily gain^a

Outcomeb	LAE present mean ADG	LAE absent mean ADG	Average difference	95% CI of the difference	P-value
Arrival fever cases
ADG to last ultrasound	2.35	1.32	1.03	0.31 to 1.74	0.007
ADG to final rehandling	2.00	1.78	0.22	−0.17 to 0.61	0.257
Arrival controls
ADG to last ultrasound	2.49	1.48	1.01	−0.73 to 2.75	0.226
ADG to final rehandling	2.15	1.83	0.32	−0.27 to 0.90	0.256
Post-arrival fever cases
ADG to last ultrasoundc	2.18	2.06	0.12	−0.21 to 0.44	0.477
ADG to final rehandling	2.03	1.86	0.17	−0.02 to 0.35	0.084
Post-arrival no fever cases
ADG to last ultrasound	2.01	1.88	0.13	−0.57 to 0.83	0.713
ADG to final rehandlingd	2.05	1.81	0.24	−0.12 to 0.59	0.185
Post-arrival controls
ADG to last ultrasoundc	2.02	2.12	−0.10	−1.07 to 0.87	0.833
ADG to final rehandlingd	1.47	1.84	−0.37	−0.86 to 0.11	0.128

^aData were analyzed using mixed models for lesion at enrollment group effects and corrected for intra-pen clustering of observations.

^bADG is average daily gain (kg/animal/day) from enrollment to last ultrasound (average 34 d), or from enrollment to final rehandling (average 128 d).

^cModels include days on feed as a covariate.

^dModels include year as a covariate.

LAE — lesion at enrollment; CI — confidence interval.