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

Table 6 Univariable and multivariable logistic regression analysis of all patients for morbidity

Variables	Univariable (n = 246)			Multivariable (n = 246)
Variables	OR	95% CI	p value	OR	95% CI	p value
Gender (male vs female)	0.60	0.32–1.11	0.101	0.79	0.36–1.72	0.548
Age (≥ 75 vs < 75)	1.17	0.64–2.14	0.607	1.573	0.67–3.69	0.298
FI score (Frail vs Non-frail)	7.05	3.53–14.06	< 0.001	7.677	3.19–18.48	< 0.001
ASA grade (III vs II)	3.05	1.67–5.57	< 0.001	2.592	1.19–5.64	0.016
Surgical approach (laparoscopic vs open)	1.24	0.65–2.39	0.518	0.905	0.37–2.23	0.827
Surgical complexity (major vs minor)	16.50	5.75–47.39	< 0.001	22.830	5.46–95.51	< 0.001
Operative time (≥ 180 min vs < 180 min)	4.11	2.22–7.58	< 0.001	0.997	0.42–2.38	0.994
Blood loss (≥ 50 ml vs < 50 ml)	5.29	2.76–10.12	< 0.001	1.121	0.41–3.09	0.825

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