3.

Univariable and multivariable linear regression analyses on risk factors for weight loss (%) 12 months after gastrectomy

Variables	Univariable		Multivariable
	B* (95% CI)	P	B* (95% CI)	P
BMI, body mass index; ASA, American Society of Anaesthesiologists; JTF, jejunostomy tube feeding; B, linear regression coefficient; 95% CI, 95% confidence interval; *, negative values represent a relative weight loss, whereas positive value represent a relative weight gain; #, defined as a complication with Clavien-Dindo classification >2.
Female gender	0.10 (–6.63, 6.83)	0.977	0.48 (–7.27, 8.23)	0.900
Age >65 year	2.87 (–3.86, 9.61)	0.392	2.87 (–6.15, 11.90)	0.516
Preoperative BMI ≥25 kg/m2	–7.70 (–13.9, –1.47)	0.017	–9.09 (–16.70, –1.44)	0.022
ASA classification >II	1.08 (–10.6, 12.80)	0.851	–3.65 (–18.90, 11.70)	0.627
Minimally invasive surgery	2.67 (–4.78, 10.10)	0.471	2.73 (–5.92, 11.40)	0.520
Neoadjuvant therapy	5.31 (–2.66, 13.30)	0.184	3.45 (–6.07, 13.00)	0.461
JTF >14 d	–4.74 (–11.5, 2.00)	0.161	–4.46 (–13.00, 4.08)	0.291
Major complications#	–1.71 (–8.49, 5.08)	0.612	2.88 (–5.81, 11.60)	0.500
Tumor stage >II	2.06 (–4.52, 8.65)	0.528	4.34 (–3.35, 12.00)	0.255