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Table 2 Short-term outcomes before and after PSM

From: Comparison of surgical and oncologic outcomes in very elderly patients (≥ 80 years old) and elderly (65–79 years old) colorectal cancer patients: a propensity score matching

Characteristics

Before PSM

After PSM

Very Elderly (331)

Elderly (1753)

P value

Very Elderly (331)

Elderly (331)

P value

Operation time (min)

215.2 ± 69.2

222.7 ± 82.1

0.118

215.2 ± 69.2

211.4 ± 75.8

0.507

Blood loss (mL)

108.9 ± 131.2

102.1 ± 134.7

0.399

108.9 ± 131.2

101.3 ± 148.9

0.484

Retrieved lymph nodes

14.3 ± 8.4

14.3 ± 7.0

0.935

14.3 ± 8.4

14.8 ± 6.9

0.415

Hospital stay (day)

13.4 ± 10.9

11.9 ± 10.6

0.015*

13.4 ± 10.9

11.5 ± 6.7

0.007**

Overall complications

118 (35.6%)

438 (25.0%)

 < 0.01**

118 (35.6%)

97 (29.3%)

0.081

Major complications

15 (4.5%)

51 (2.9%)

0.122

15 (4.5%)

11 (3.3%)

0.424

  1. T2DM, type 2 diabetes mellitus; PSM, propensity score matching
  2. Variables are expressed as the mean ± SD, n (%), *P-value < 0.05, ** P-value < 0.01