Table 3.

Predictive factors in Cox Proportionate Hazards Models, including diagnosis of dementia, age, educational level, sex, family history of dementia, CT scan findings, and vascular risk factors, for the progression of dementia (worsening of severity according to CDR scale).

Variable	Hazards ratio	CI 95% lower–upper	P-value	r
Diagnosis of dementia	18.627	0.94–370.77	.055	2.925
Age	1.060	96–1.17	.254	0.058
Sex	0.510	0.13–1.96	.327	−0.673
Educational level	1.323	1.10–1.59	.002	0.280
Vascular risk factors			.329
Hypertension	38.32	1.37–1070.3	.032	3.646
Diabetes mellitus	0.000	0.00–2.3E +101	.992	−9.928
Hypertension + diabetes mellitus	28.30	0.74 – 1082.7	.072	3.343
Family history of dementia			.339
Present	0.473	0.09–2.62	.392	−0.748
Unknown	0.305	0.05–1.81	.191	−1.187
CT findings			.985
Mild diffuse atrophy AND/OR ↑  ventricles	547201.7	0.00–8.5E +111	.919	13.213
Atrophy + leukoaraiosis	728853.1	0.00–1.1E +117	.918	13.499
Focal abnormality	392780.9	0.00 –6.1E +116	.921	12.881

Diagnosis of dementia: 0 = VaD; 1= AD.