Frailty index is useful for predicting postoperative morbidity in older patients undergoing gastrointestinal surgery: a prospective cohort study

Table 7 Univariable and multivariable logistic regression analysis of patients with major operations for morbidity

Variables	Univariable (n = 140)			Multivariable (n = 140)
Variables	OR	95% CI	p value	OR	95% CI	p value
Gender (male vs female)	0.88	0.44–1.78	0.729	0.86	0.38–1.99	0.730
Age (≥ 75 vs < 75)	2.66	1.23–5.75	0.013	2.03	0.82–5.05	0.129
FI score (Frail VS Non-frail)	9.29	3.64–23.72	< 0.001	8.67	3.23–23.25	< 0.001
ASA grade (III VS II)	3.05	1.50–6.21	0.002	2.27	0.98–5.25	0.055
Surgical approach (laparoscopic vs open)	0.71	0.34–1.45	0.341	0.93	0.37–2.34	0.817
Operative time (≥ 180 min vs < 180 min)	1.56	0.78–3.12	0.213	1.11	0.45–2.72	0.825
Blood loss (≥ 50 ml vs < 50 ml)	1.59	0.74–3.43	0.239	0.94	0.32–2.72	0.907

OR odds ratio, CI confidence interval, FI frailty index, ASA American Society of Anesthesiologists

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