. Author manuscript; available in PMC: 2015 Nov 6.

Published in final edited form as: J Alzheimers Dis. 2015 Sep 9;48(2):483–493. doi: 10.3233/JAD-150421

Table 2.

Cox Proportional Hazards Model for MCI or Dementia

	Hazard Ratio (95% Confidence Interval)	p-value
Class 1	1.69 (1.28–2.22)	<0.001
Class 2	3.09 (2.16–4.4)	<0.001
Class 3	1.81 (1.41–2.31)	<0.001
Class 4	Reference Class
Age (yrs)	1.06 (1.05–1.07)	<0.001
Female	0.83 (0.73–0.95)	0.007
Education (yrs)	0.99 (0.99–1)	0.048
White	1.01 (0.84–1.22)	0.889
MMSE	0.99 (0.99–0.99)	<0.001
Antidepressant use	1.47 (1.23–1.75)	<0.001

Abbreviations: MMSE – Mini Mental Status Exam