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. Author manuscript; available in PMC: 2013 May 25.
Published in final edited form as: Clin Trials. 2012 Apr 30;10(1 0):S5–S36. doi: 10.1177/1740774512440342

Table A2.

Parameter estimates for CD4 trajectory before ART initiation under the reduced model

Square root CD4 Estimate 95% Confidence interval
Fixed effects
 Mean at SC (A) α 24.14 24.03 24.25
 Mean slope (B) β −1.35 −1.38 to −1.32
Random effects
 SD(A) σa 5.82 5.73 5.91
 SD(B) σb 1.23 1.20–1.26
 Corr(A,B) rab −0.38 −0.41 to −0.36
Measurement error
 SD(E) σe 2.78 2.76 2.79

CD4: CD4+ T lymphocyte; ART: antiretroviral treatment; SD: standard deviation.