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Table 3 Effect of covariates: betas (P-values) for significant covariates*

From: Predicting progression of Alzheimer's disease

  Covariates
Progression Measures Age Sex (1 = male, 0 = female) Education AMNART Delusions Hallucinations Extra-pyramidal Signs APOE Genotype
ADAS-Cog -0.962 (.067) NS 0.291 (.055) -0.229 (<.001) 2.914 (.001) NS NS NS
VSAT Time -1.493 (<.001) NS NS -2.339 (.001) NS NS NS NS
VSAT Errors -0.179 (<.001) NS NS -0.272 (<.001) NS NS NS NS
SCDR NS NS NS NS 1.386 (<.001) 1.245 (.003) NS NS
IADL NS -2.109 (<.001) NS NS 2.762 (<.001) 1.619 (.008) NS NS
PSMS 0.037 (.055) NS NS NS 1.509 (<.001) 1.945 (.009) NS NS
  1. *Betas calculated in models adjusted for baseline severity, duration, pre-progression rate × time, pre-progression × time squared (if applicable), and other covariates that achieved the selection criterion of P < 0.10. NS means the covariate did not achieve the criterion of P < .10, or did not retain this significance level when included in the full model.
  2. ADAS-Cog = Alzheimer's disease Assessment Scale-Cognitive Subscale; AMNART = American version of the New Adult Reading Test; CDR-SB = Clinical Dementia Rating Scale Sum of Boxes; IADL = Instrumental Activities of Daily Living scale; PSMS = Physical Self-Maintenance Scale; VSAT = Verbal Series Attention Test.