Table 3

Results of the Cox proportional hazards multivariate model for prediction of dementia (81 patients included in the analysis). The hazard risk ratio for each variable estimates its relative risk associated with a score below or above the median (in parenthesis) independently of all other variables in the model

VariableCoefficientRelative risk95% CIp Value
Completion (<10)1.58314.90.98–24.120.03
Age at onset (>60 years)1.41684.11.11–15.310.02
Stroop C (<21)1.33433.80.74–20.000.08
Letter fluency (<9)0.98042.70.81–9.090.09