Table 2.

Summary of Associations between low DARS and Postoperative Delirium Risk Using the three different cut point locations for low DARS, in four different multiple variable logistic regression models. Risk Factors modelled include age, anticholinergic burden (ACB) score, procedure duration, gender and ASA Physical Status Classification. Medications modelled include opioids (in morphine equivalents), midazolam, propofol, ketamine, phenylephrine, dexmedetomidine, and nitrous oxide use.

Model	Low DARS Effect Conservative Cut Point (26.18)		Low DARS Effect Optimimum Cut Point (28.755)		Low DARS Effect Liberal Cut Point (29.80)
	OR (95% CI)	p-value	OR (95% CI)	p-value	OR (95% CI)	p-value
1. DARS +Site	4.64 (1.92, 11.39)	0.001	4.30 (1.89, 10.01)	0.001	3.24 (1.46, 7.40)	0.004
2. DARS + Site + Risk Factors	3.74 (1.52, 9.32)	0.005	3.79 (1.63, 9.10)	0.003	3.16 (1.37, 7.55)	0.009
3. DARS + Site + Medications	4.57 (1.84, 11.58)	0.002	4.21 (1.80, 10.16)	0.002	3.44 (1.47, 8.34)	0.006
4. DARS + Site + Risk factors + Meds	3.75 (1.45, 9.87)	0.009	3.64 (1.49, 9.25)	0.007	3.12 (1.28, 7.96)	0.017