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Table 2 Short-term outcomes before and after PSM

From: The short-term and oncologic outcomes of younger VS older colorectal cancer patients undergoing primary surgery: a propensity score matching analysis

Characteristics Before PSM After PSM
Younger (403) Older (4196) P value Younger (401) Older (401) P value
Operation time (min) 236.8 ± 83.5 227.6 ± 83.5 0.038* 237.0 ± 83.6 227.9 ± 84.0 0.126
Blood loss (mL) 109.4 ± 127.3 106.9 ± 152.3 0.756 109.6 ± 127.6 105.5 ± 123.4 0.643
Retrieved lymph nodes 16.9 ± 8.8 14.6 ± 7.5 <0.001* 16.9 ± 8.8 15.0 ± 7.2 0.001*
Hospital stay (day) 11.3 ± 7.6 11.5 ± 8.8 0.682 11.3 ± 7.6 11.5 ± 8.2 0.731
Overall complications 77 (19.1%) 940 (22.4%) 0.128 76 (19.0%) 93 (23.2%) 0.141
Major complications 7 (1.7%) 104 (2.5%) 0.354 7 (1.7%) 14 (3.5%) 0.122
  1. Note: Variables are expressed as the mean ± SD, n (%), *P-value <0.05
  2. Abbreviations: PSM propensity score matching