Table 6 Univariate and multivariate analyses on OS of elderly patients

Gender (male vs. female)

0.976(0.574–1.661)

0.928

Smoking (yes vs. no)

0.960⁽0.610–1.513⁾

0.861

Drinking (yes vs. no)

1.024⁽0.635–1.652⁾

0.922

Tumor size, mm(≤ 5 vs. > 5)

1.610(0.993–2.611)

0.053

Differentiation (poorly VS. well and moderately)

0.532(0.321–0.881)

0.014

0.689(0.410–1.158)

0.160

SII(> 489.52 vs. ≤ 489.52)

1.612(1.012–2.567)

0.044

2.372(1.444–3.896)

0.001

Alb, g/L(≤ 39.85 vs. > 39.85)

0.132(0.048–0.361)

< 0.001

0.164(0.059–0.457)

0.001

CEA, ug/ml(≤ 2.17 ug/ml vs. > 2.17 ug/ml)

1.704(1.069–2.715)

0.025

1.530(0.930–2.517)

0.094

CA199, u/ml(≤ 21 u/mL vs. > 21 u/mL)

1.848(1.138–3.002)

0.013

1.457(0.877–2.421)

1.146

CA125, u/ml(≤ 14.6 u/ml vs. > 14.6 u/ml)

1.142(0.718–1.818)

0.574

WBC, 10⁹/L(≤ 6.525 vs. > 6.525)

0.940(0.574–1.539)

0.806

Type of surgery

< 0.001

0.002

 DG

1(reference)

1(reference)

 PG

1.893(0.875–4.098)

1.548(0.709–3.381)

 TG

4.004(1.937–8.279)

3.174(1.490–6.760)

TNM stage

0.020

0.090

 I

1(reference)

1(reference)

 II

0.902(0.397–2.049)

0.766(0.328–1.786)

 III

1.914(1.020–3.590)

1.539(0.798–2.967)