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. Author manuscript; available in PMC: 2009 Sep 25.
Published in final edited form as: Clin Chem. 2008 May 1;54(7):1210–1217. doi: 10.1373/clinchem.2007.102632

Table 3.

Multiple linear regression models for delayed recall score.a

Independent
variable		 R2 Coefficient
(SE)		 P R2 Coefficient
(SE)		 P R2 Coefficient
(SE)		 P
Total B12 <0.001 0.0003 (0.001) NS 0.316 −0.001 (0.001) NS 0.276 −0.001 (0.001) NS
HoloTC 0.003 0.005 (0.003) NS 0.315 0.0001 (0.002) NS 0.276 0.001 (0.002) NS
HoloTC/B12 0.003 7.97 (0.29) NS 0.316 1.24 (0.88) NS 0.276 0.921 (0.85) NS
a

Model 1, univariate analysis; model 2, model 1 plus age, sex, years of education, diabetes, stroke, homocysteine, and creatinine; model 3, model 2 plus CES-D score (< or ≥16). R2 values are for the entire model including the B12 status measure and all covariates. Coefficients (SE) and P values are for each B12 status measure within the model. Sample sizes are smaller in models 2 and 3 due to missing values among the covariates. NS, not significant (P > 0.05).