Table 3.

Delirium and Risk of Functional Decline

	Rate of Functional Decline*		Risk of Functional Decline†
	With delirium n/N (%)	Without delirium n/N (%)	Unadjusted Risk Ratio (95% CI)	Adjusted Risk Ratio‡ (95% CI)
1-month
1-month functional decline*	37/74 (50%)	28/105 (27%)	1.9 (1.3, 2.8)	1.8 (1.2, 2.6)
12-month
1-month functional decline*	16/78 (21%)	11/100 (11%)	1.9 (0.9, 3.8)	1.5 (0.6, 3.3)

CI – Confidence Interval

^*Functional decline is defined as a decline of ≥2 Instrumental Activities of Daily Living (IADL) points at the follow up assessment relative to the preoperative assessment

^†Risk of functional decline in those with delirium relative to those without delirium

^‡Adjusted analyses use Poisson regression to adjust for age, Charlson Comorbidity Index, Mini Mental State Examination, and baseline IADL scores