Before matching | After matching | |||||
---|---|---|---|---|---|---|
LAC (n = 303) N (%) or mean (SD) | OC (n = 126) N (%) or mean (SD) | p | LAC (n = 121) N (%) or mean (SD) | OC (n = 121) N (%) or mean (SD) | p | |
Age (year) | 55.00 (13.75) | 59.46 (14.41) | 0.003 | 56.95 (13.91) | 59.61 (14.61) | 0.148 |
Gender (male) | 188 (62.0) | 80 (63.5) | 0.778 | 76 (62.8) | 81 (66.9) | 0.501 |
BMI (Kg/m2) | 22.46 (3.68) | 21.70 (3.53) | 0.205 | 22.04 (2.98) | 21.62 (3.54) | 0.490 |
Previous abdominal surgery (+) | 35 (11.6) | 25 (19.8) | 0.024 | 15 (12.4) | 23 (19.0) | 0.158 |
Comorbidity | 0.003 | 0.201 | ||||
0 | 227 (74.9) | 76 (60.3) | 85 (70.2) | 74 (61.2) | ||
1 | 57 (18.8) | 31 (24.6) | 26 (21.5) | 29 (24.0) | ||
≥ 2 | 19 (6.3) | 19 (15.1) | 10 (8.3) | 18 (14.9) | ||
Neoadjuvant chemotherapy (+) | 5 (1.7) | 6 (4.8) | 0.089 | 1 (0.8) | 6 (5.0) | 0.120 |
Primary tumor size (cm) | 5.02 (2.17) | 5.50 (2.41) | 0.042 | 5.02 (2.09) | 5.49 (2.31) | 0.096 |
Histological differentiation | 0.081 | 0.571 | ||||
G1~ 2 | 230 (76.7) | 93 (72.1) | 94 (77.7) | 87 (71.9) | ||
G3 | 39 (13.0) | 27 (20.9) | 20 (16.5) | 26 (21.5) | ||
Gx | 31 (10.3) | 9 (7.0) | 7 (5.8) | 8 (6.6) | ||
Conversion to open surgery (+) | 15 (5.0) | – | 11 (9.1) | – | ||
Severe adhesion | 5 (33.3) | – | 5 (45.5) | – | ||
Bulky tumor | 8 (53.4) | – | 4 (36.4) | – | ||
Technical difficulties | 2 (13.3) | – | 2 (18.2) | – | ||
Primary tumor location | 0.635 | 0.235 | ||||
Caecum | 7 (2.3) | 5 (4.0) | 1 (0.8) | 5 (4.1) | ||
Ascending colon | 72 (23.8) | 31 (24.6) | 32 (26.4) | 30 (24.8) | ||
Transverse colon | 78 (25.7) | 37 (29.4) | 27 (22.3) | 35 (28.9) | ||
Descending colon | 34 (11.2) | 15 (11.9) | 14 (11.6) | 16 (13.2) | ||
Sigmoid colon | 112 (37.0) | 38 (30.2) | 47 (38.8) | 35 (28.9) | ||
Surgical procedure | 0.128 | 0.095 | ||||
Left colectomy | 65 (21.5) | 17 (13.5) | 28 (23.1) | 16 (13.2) | ||
Extended left colectomy | 1 (0.3) | 0 (0.0) | 1 (0.8) | 0 (0.0) | ||
Transverse colectomy | 9 (3.0) | 10 (7.9) | 2 (1.7) | 9 (7.4) | ||
Right colectomy | 112 (37.0) | 53 (42.1) | 43 (35.5) | 52 (43.0) | ||
Extended right colectomy | 18 (5.9) | 6 (4.8) | 6 (5.0) | 6 (5.0) | ||
Sigmoid colectomy | 92 (30.4) | 39 (31.0) | 39 (32.2) | 37 (30.6) | ||
Total colectomy | 6 (2.0) | 1 (0.8) | 2 (1.7) | 1 (0.8) | ||
Multivisceral resection (+) | 152 (50.2) | 85 (67.5) | 0.100 | 62 (51.2) | 65 (53.7) | 0.699 |
Clinic N stage | 0.108 | 0.095 | ||||
cN0 | 169 (55.8) | 70 (55.6) | 67 (55.4) | 66 (54.5) | ||
cN1 | 87 (28.7) | 45 (35.7) | 33 (27.3) | 44 (36.4) | ||
cN2 | 47 (15.5) | 11 (8.7) | 21 (17.4) | 11 (9.1) | ||
Pathologic T stage | 0.916 | 0.895 | ||||
pT4a | 194 (64.0) | 80 (63.5) | 75 (62.0) | 74 (61.2) | ||
pT4b | 109 (36.0) | 46 (36.5) | 46 (38.0) | 47 (38.8) | ||
Pathologic N stage | 0.961 | 0.995 | ||||
pN0 | 173 (57.1) | 73 (57.9) | 69 (57.0) | 69 (57.0) | ||
pN1a | 40 (13.2) | 18 (14.3) | 15 (12.4) | 17 (14.0) | ||
pN1b | 43 (14.2) | 19 (15.1) | 20 (16.5) | 19 (15.7) | ||
pN2a | 29 (9.6) | 10 (7.9) | 11 (9.1) | 10 (8.3) | ||
pN2b | 18 (5.9) | 6 (4.8) | 6 (5.0) | 6 (5.0) | ||
Pathologic TNM stage | 0.988 | 0.977 | ||||
IIB | 124 (40.9) | 51 (40.5) | 48 (39.7) | 47 (38.8) | ||
IIC | 49 (16.2) | 22 (17.5) | 21 (17.4) | 22 (18.2) | ||
IIIB | 45 (14.9) | 19 (15.1) | 19 (15.7) | 17 (14.0) | ||
IIIC | 85 (28.1) | 34 (27.0) | 33 (27.3) | 35 (28.9) |