Table 2. Hazard Ratios for Index Hospitalization Comparing Mild Cognitive Impairment (MCI) Status to Normals at Baseline.

The reference group is those with normal cognition.

Model	HR	95% CI	P
Unadjusted	1.25	1.09 – 1.42	<0.01
+ demographics, clinic site, Ginkgo biloba assignment	1.22	1.07 – 1.40	<0.01
Above + comorbidities	1.19	1.04 – 1.37	0.01
Above + number of prescription medications	1.18	1.03 – 1.35	0.02
Above + plus living with proxy	1.17	1.02 – 1.34	0.02
Above, in participants living with proxy*	1.39	1.17 – 1.66	n/a
Above, in participants not living with proxy*	0.94	0.76 – 1.16	n/a

Legend: Demographics include age, sex, race, level of education. Comorbidities: hypertension, diabetes, cancer, congestive heart failure, myocardial infarction, angina, kidney disease, liver disease, stroke, emphysema. "Living with proxy" refers to whether a participant lives with the listed proxy.

^*The interaction of MCI at baseline and living with proxy was significant (chi-square 8.274, p=0.004), therefore the final model is presented stratified by whether the participant lives with proxy.