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. Author manuscript; available in PMC: 2014 May 28.
Published in final edited form as: JAMA Surg. 2014 Feb;149(2):177–184. doi: 10.1001/jamasurg.2013.3660

Table 1.

Patient and Hospital Characteristics of Elective Colectomiesa

No. (%)

Characteristic Total
(N = 244 129
[100%])
Robot-Assisted
Colectomy
(n = 1584
[0.6%])
Laparoscopic
Colectomy
(n = 116 261
[47.6%])
Open
Colectomy
(n = 126 284
[51.7%])
P Valueb
Patient characteristics
Resection type
  Right hemicolectomy 90838 (37.2) 536 (33.9) 47532 (40.9) 42769 (33.9) <.001c
  Sigmoidectomy 90 171 (36.9) 874 (55.2) 45 965 (39.5) 43 332 (34.3)
  Others 63 120 (25.9) 174 (10.9) 22 765 (19.6) 40 181 (31.8)
  Age, median (IQR), y 64 (21) 61.5 (18) 62 (20) 65 (21) <.001c
Race/ethnicity
  White 20 1089 (82.4) 1219 (76.9) 96 878 (83.3) 10 2992 (81.6) .002c
  Black 21 175 (8.7) 86 (5.5) 9053 (7.8) 12 036 (9.5)
  Hispanic 12 659 (5.2) 185 (11.7) 6176 (5.3) 6484 (4.9)
  Others 9206 (3.8) 93 (5.9) 4154 (3.6) 5051 (3.9)
Sex
  Male 110822 (45.4) 640 (40.4) 54609 (47.0) 55573 (44.0) <.001c
  Female 133 307 (54.6) 944 (59.6) 61 652 (53.0) 70 710 (56.0)
Charlson Comorbidity Index score
  0 95 644 (39.2) 767 (48.4) 52 883 (45.5) 41 993 (33.3) <.001c
  1–2 80 857 (33.1) 533 (33.6) 39 099 (33.7) 41 224 (32.6)
  ≥3 67 628 (27.7) 284 (17.9) 24 279 (20.9) 43 066 (34.1)
Surgical indication
  Colon cancer 81 423 (33.4) 456 (28.8) 37 203 (32.0) 43 764 (34.7) <.001c
  Diverticular disease 77 900 (31.9) 642 (40.5) 42 590 (36.6) 34 669 (27.5)
  Others 84 805 (34.7) 487 (30.7) 35 967 (31.3) 47 851 (37.8)
Primary payer
  Private 115 325 (47.2) 918 (58.0) 61 387 (52.8) 53 020 (42.0) <.001c
  Medicare 113 614 (46.5) 603 (38.1) 49 055 (42.2) 63 956 (50.6)
  Medicaid/others 15190 (6.2) 63 (4.0) 5819 (5.0) 9308 (7.4)
Median household income, $
  <38 999 54 659 (22.4) 214 (13.5) 21 496 (18.5) 32 949 (26.1) <.001c
  39 000–47 999 63 516 (26.0) 352 (22.2) 27 508 (23.7) 35 656 (28.2)
  48 000–62 999 62 081 (25.4) 494 (31.2) 31 107 (26.8) 30 480 (24.1)
  >63 000 63 874 (26.2) 524 (33.1) 36 151 (31.1) 27 198 (21.5)
Hospital characteristics
  Size
    Small 27 303 (11.2) 157 (9.9) 11 723 (10.1) 15 423 (12.2) .14
    Medium 58 638 (24.0) 379 (23.9) 29 305 (25.2) 28 954 (22.9)
    Large 158 188 (64.8) 1048 (66.1) 75 233 (64.7) 81 907 (64.9)
  Type
    Nonteaching 123 706 (50.7) 418 (26.4) 57 543 (49.5) 65 745 (52.1) .001c
    Teaching 120 424 (49.3) 1166 (73.6) 58 718 (50.5) 60 539 (47.9)
  Location
    Rural 26 882 (11.0) <11 (0.3) 8652 (7.4) 18 226 (14.4) <.001c
    Urban 217 248 (89.0) 1580 (99.7) 107 610 (92.6) 108 058 (85.6)
  Volume tertile
    Small 81 671 (33.5) 297 (18.8) 33 186 (28.5) 48 188 (38.2) <.001c
    Middle 80 955 (33.2) 612 (38.6) 39 275 (33.8) 41 068 (32.5)
    Large 81 503 (33.3) 675 (42.6) 43 801 (37.7) 37 028 (29.3)

Abbreviation: IQR, interquartile range.

a

Weighted counts using Nationwide Inpatient Sample complex survey weights; numbers may not sum to group totals or percentages may not add to 100 owing to the need for rounding. Numbers are rounded to nearest integral number and percentages are based on rounded numbers.

b

The P values address comparison across all 3 procedures.

c

Statistically significant, with P < .05.