Table 3. Multiple Regression Analysis for Days from Surgery to Discharge (n = 20,642).

Variables	Partial Regression Coefficient (B)	Standardized Coefficient (β)	95% Confidence Intervals		p-value
			Lower	Upper
Age (continuous variable)	−0.034	−0.026	−0.052	−0.016	0.0002
Men	−0.519	−0.033	−0.732	−0.306	<0.0001
Charlson Comorbidity Index
0 (reference)
1–2	1.526	0.050	0.939	2.114	<0.0001
≥3	2.913	0.095	2.312	3.514	<0.0001
Number of Drugs Used
1–2 (reference)
3–4	2.231	0.039	1.446	3.016	<0.0001
Days from Surgery to First Day of Delirium
0–1 (reference)
2–3	2.943	0.090	2.490	3.397	<0.0001
4–6	7.744	0.175	7.123	8.363	<0.0001
Consultation-Liaison Psychiatry
None (reference)
Early (0–2 days)	−1.136	−0.019	−1.942	−0.330	0.0057
Late (3–5 days)	0.205	0.002	−1.447	1.856	0.9069