Table 3.

Linear regression for left and right hippocampal volume with age in ex-CFL players, study controls and Cam-CAN controls, where “:” indicates an interaction between the two terms.

Variable	Left hippocampus			Right hippocampus
	β	95% CI	p	β	95% CI	p
InterceptCam-CAN controls	−0.046	−0.14 to 0.05	0.350	−0.077	−0.17 to 0.02	0.112
Cohortstudy controls	0.412	0.01 to 0.82	0.047	0.603	0.21 to 1.00	0.003
Cohortex-CFL players	0.119	−0.13 to 0.37	0.347	0.213	−0.03 to 0.46	0.084
AgeCam-CAN controls	−0.484	−0.58 to −0.39	<0.001	−0.479	−0.57 to −0.39	<0.001
Age: Cohortstudy controls	0.169	−0.35 to 0.69	0.528	0.078	−0.43 to 0.59	0.765
Age: Cohortex-CFL players	−0.351	−0.64 to −0.06	0.017	−0.431	−0.71 to −0.15	0.003

Ex-CFL = retired Canadian Football League players.