Table 2 Demographics and pathologic characteristics of patients undergoing left colectomy before and after propensity score matching
Unmatched left colectomy dataset | 2:1 Matched left colectomy dataset | |||||||
|---|---|---|---|---|---|---|---|---|
Laparoscopic | Robotic | SMD | p§ | Laparoscopic | Robotic | SMD | p‡ | |
Sample size | 16,078 | 3123 | 6246 | 3123 | ||||
Age, years | < 0.01* | 0.33 | ||||||
18–40 | 418 (2.6) | 101 (3.2) | 0.038 | 162 (2.6) | 101 (3.2) | 0.038 | ||
41–60 | 4375 (27.2) | 1022 (32.7) | 0.121 | 2001 (32.0) | 1022 (32.7) | 0.015 | ||
61–80 | 9005 (56.0) | 1663 (53.3) | 0.055 | 3392 (54.3) | 1663 (53.3) | 0.021 | ||
> 80 | 2280 (14.2) | 337 (10.8) | 0.103 | 691 (11.1) | 337 (10.8) | 0.009 | ||
Sex | 0.014* | 0.99 | ||||||
Female | 8059 (50.1) | 1490 (47.7) | 0.048 | 2980 (47.7) | 1490 (47.7) | 0.001 | ||
Male | 8019 (49.9) | 1633 (52.3) | 0.048 | 3266 (52.3) | 1633 (52.3) | 0.001 | ||
Race/ethnicity | < 0.01* | 0.15 | ||||||
White | 9860 (61.3) | 2385 (76.4) | 0.329 | 4868 (77.9) | 2385 (76.4) | 0.037 | ||
Black or AA | 1532 (9.5) | 382 (12.2) | 0.087 | 701 (11.2) | 382 (12.2) | 0.031 | ||
Asian | 1212 (7.5) | 170 (5.4) | 0.085 | 314 (5.0) | 170 (5.4) | 0.019 | ||
Other | 3474 (21.6) | 186 (6.0) | 0.466 | 363 (5.8) | 186 (6.0) | 0.006 | ||
Hispanic | 817 (5.1) | 174 (5.6) | 0.022 | 314 (5.0) | 174 (5.6) | 0.024 | ||
BMI | < 0.01* | 0.73 | ||||||
< 18 | 332 (2.1) | 42 (1.3) | 0.056 | 75 (1.2) | 42 (1.3) | 0.013 | ||
18–25 | 4452 (27.7) | 784 (25.1) | 0.059 | 1580 (25.3) | 784 (25.1) | 0.004 | ||
25–30 | 5602 (34.8) | 1022 (32.7) | 0.045 | 2075 (33.2) | 1022 (32.7) | 0.011 | ||
> 30 | 5692 (35.4) | 1275 (40.8) | 0.112 | 2516 (40.3) | 1275 (40.8) | 0.011 | ||
ASA classification | 0.021* | 0.02* | ||||||
Class 1 | 282 (1.8) | 42 (1.3) | 0.033 | 67 (1.1) | 42 (1.3) | 0.025 | ||
Class 2 | 5886 (36.6) | 1148 (36.8) | 0.003 | 2312 (37.0) | 1148 (36.8) | 0.005 | ||
Class 3 | 8939 (55.6) | 1781 (57.0) | 0.029 | 3624 (58.0) | 1781 (57.0) | 0.020 | ||
Class 4 | 971 (6.0) | 152 (4.9) | 0.052 | 243 (3.9) | 152 (4.9) | 0.048 | ||
Pathologic T stage | < 0.01* | 0.91 | ||||||
T1 | 1898 (11.8) | 418 (13.4) | 0.048 | 854 (13.7) | 418 (13.4) | 0.008 | ||
T2 | 2565 (16.0) | 524 (16.8) | 0.022 | 1052 (16.8) | 524 (16.8) | 0.002 | ||
T3 | 7723 (48.0) | 1417 (45.4) | 0.053 | 2859 (45.8) | 1417 (45.4) | 0.008 | ||
T4 | 1901 (11.8) | 329 (10.5) | 0.041 | 633 (10.1) | 329 (10.5) | 0.013 | ||
Other | 1991 (12.4) | 435 (13.9) | 0.046 | 848 (13.6) | 435 (13.9) | 0.010 | ||
Mechanical bowel prep | < 0.01* | 0.71 | ||||||
Yes | 10,295 (64.0) | 2277 (72.9) | 0.192 | 4572 (73.2) | 2277 (72.9) | 0.006 | ||
No | 5783 (36.0) | 847 (27.1) | 0.192 | 1674 (26.8) | 846 (27.1) | 0.006 | ||
Antibiotic bowel prep | < 0.01* | 0.91 | ||||||
Yes | 8121 (50.5) | 1940 (62.1) | 0.236 | 3886 (62.2) | 1940 (62.1) | 0.002 | ||
No | 7957 (49.5) | 1183 (37.9) | 0.236 | 2360 (37.8) | 1183 (37.9) | 0.002 | ||