Frailty index and its association with the onset of postoperative delirium in older adults undergoing elective surgery

Table 4 Logistic regression for the association between frailty and POD (n = 701)

	Model 1^a		Model 2^b
	OR [95% CI]	c-statistic	OR [95% CI]	c-statistic
Frailty (categorical) (FI ≥ 0.2)	1.66 [1.06, 2.59]	0.596	2.14 [1.33, 3.44]	0.705
Frailty Index continuous (increase of 0.1)	1.32 [1.12, 1.57]	0.613	1.57 [1.30, 1.90]	0.722

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