Table 2.

Linear regression models incorporating donation group and age by decade

Model	CD4+ T cells		CD8+ T cells
	Estimate (cells per microliter)	P	Estimate (cells per microliter)	P
Donation model
Constant	812		478
3-19 group	−256	.004	−176	.005
20-24 group	−472	<.001	−308	<.001
Age model
Constant	801		511
50-59 y	−315	.003	−311	<.001
60-69 y	−369	<.001	−328	<.001
≥70 y	−507	<.001	−363	<.001
Multivariable model
Constant	890		560
3-19 group	−162	.050	−92	.062
20-24 group	−305	.001	−155	.004
50-59 y	−232	.021	−270	<.001
60-69 y	−251	.005	−267	<.001
≥70 y	−370	<.001	−293	<.001