Table 2.

Association of genotype and DSST T-score, adjusted for factors that were associated with genotype severity

Covariates (X)Model adjusted for XVIF*
β (SE); P
Unadjusted −7.42 (2.48); .004 1.00 
Hemoglobin −7.10 (3.05); .02 1.50 
Ferritin −7.62 (2.67); .006 1.05 
DBP −7.97 (2.63); .003 1.07 
MAP −8.14 (2.68); .003 1.09 
Hydroxyurea use −7.54 (2.58); .004 1.07 
Stroke/SCI history −6.63 (2.42); .008 1.02 
Fully adjusted −8.70 (3.47); .01 7.76 
Covariates (X)Model adjusted for XVIF*
β (SE); P
Unadjusted −7.42 (2.48); .004 1.00 
Hemoglobin −7.10 (3.05); .02 1.50 
Ferritin −7.62 (2.67); .006 1.05 
DBP −7.97 (2.63); .003 1.07 
MAP −8.14 (2.68); .003 1.09 
Hydroxyurea use −7.54 (2.58); .004 1.07 
Stroke/SCI history −6.63 (2.42); .008 1.02 
Fully adjusted −8.70 (3.47); .01 7.76 

DSST T-scores are adjusted for age, race, sex, and education. The β and P values are for the variable “genotype” (severe vs moderate-severe), for the model of “genotype” predicting DSST score, adjusted for the covariate reported in the corresponding row of the table.

SE, standard error.

*

VIF indicates variance inflation factor of genotype in unadjusted and adjusted models.

Fully adjusted model includes genotype, hemoglobin, ferritin, DBP, MAP, hydroxyurea use, and stroke/SCI history as predictors.