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Table 2 Relationship between tumor and surgical features and outcomes

From: Effectiveness of adjuvant chemotherapy for elderly patients with lymph node-positive colorectal cancer

  Age <75 years Age ≥75 years p
Histological grade (well/mod/poor) 54 (35.8 %)/83 (55.0 %)/14 (9.2 %) 19 (35.8 %)/28 (52.8 %)/6 (11.4 %) 0.99
Lymphatic invasion (no/yes) 6 (4.0 %)/145 (96.0 %) 6 (11.3 %)/47 (88.7 %) 0.02
Vessel invasion (no/yes) 20 (13.2 %)/131 (86.8 %) 7 (13.2 %)/46 (86.8 %) 0.99
Operation time (min) 480 (80–713) 241 (74–645) 0.35
Blood loss (g) 185 (10–1400) 129 (20–510) 0.07
Laparoscopic surgery (no/yes) 83 (55.0 %)/69 (45.0 %) 31 (58.5 %)/22 (41.5 %) 0.62
Composite resection (no/yes) 143 (94.7 %)/8 (5.3 %) 48 (90.6 %)/5 (9.4 %) 0.38
Postoperative chemotherapy (no/yes) 36 (23.8 %)/115 (76.2 %) 32 (60.4 %)/21 (39.6 %) <0.01
Postoperative complication (no/yes) 95 (62.9 %)/56 (37.1 %) 32 (60.4 %)/21 (39.6 %) 0.74
Hospital stay (days) 25.7 (14–31) 25.5 (16–40) 0.93