Table 3.

Predictors of Delirium in Derivation Cohort. Results of multivariate modeling with bootstrap resampling.

Variable	Bootstrapping Selection*	Included in Prediction Rule
Mini Mental State Examination	87	Yes
Prior Stroke /TIA†	70	Yes
Abnormal Albumin‡	58	Yes
Geriatric Depression Scale	52	Yes
Body Mass Index	35	No
Age	32	No
Alcohol use	31	No
Female Sex	15	No

^*Bootstrapping selection is the number of times in 100 replications a variable was retained in the final backwards stepwise selected model at an alpha level of 0.05. Bootstrap replications were drawn from augmented data set derived using multiple imputation.

^†TIA-transient Ischemic attack

^‡Abnormal albumin (≤3.5 or ≥4.5g/dL)