No IBD

(n = 845,051)

CD

(n = 2416)

p-value

UC

(n = 1845)

p-value

Age (mean, SE)

41.44

0.08

41.46

0.72

0.967

44.99

0.81

<0.001

Sex

0.380

0.672

Male

446,401

53.31%

1235

51.30%

1000

54.43%

Female

390,956

46.69%

1173

48.70%

837

45.57%

Race

<0.001

<0.001

White

493,815

64.38%

1686

77.79%

1,424

83.39%

Black

57,904

7.55%

185

8.52%

113

6.62%

Hispanic

150,255

19.59%

184

8.47%

114

6.67%

Other

65,104

8.49%

113

5.22%

57

3.33%

Insurance

<0.001

<0.001

Medicare

102,771

12.20%

337

14.01%

284

15.40%

Medicaid

103,107

12.24%

232

9.63%

140

7.59%

Private

459,099

54.49%

1545

64.19%

1,259

68.24%

Other

177,632

21.08%

293

12.17%

162

8.77%

Income Quartile

0.491

<0.001

1

190,784

23.12%

511

21.52%

278

15.58%

2

196,955

23.87%

549

23.14%

393

21.97%

3

217,250

26.33%

608

25.60%

486

27.18%

4

220,093

26.68%

706

29.73%

630

35.27%

Elixhauser Comorbidity

<0.001

<0.001

<3

765,867

90.63%

2,082

86.15%

1,529

82.88%

≥3

79,184

9.37%

335

13.85%

316

17.12%

Hospital Bed Size

0.692

0.362

Small

116,963

13.92%

361

14.96%

239

13.00%

Medium

222,620

26.50%

658

27.29%

437

23.82%

Large

500,389

59.57%

1,393

57.76%

1,160

63.18%

Hospital Type

0.360

0.323

Rural

94,489

11.25%

308

12.78%

179

9.74%

Urban Non-Teaching

402,265

47.89%

1,187

49.22%

841

45.81%

Urban Teaching

343,218

40.86%

917

38.00%

816

44.45%

Hospital Region

0.019

0.007

Northeast

186,259

22.04%

544

22.52%

514

27.88%

Midwest

145,426

17.21%

534

22.10%

369

19.99%

South

287,006

33.96%

799

33.07%

539

29.23%

West

226,361

26.79%

539

22.30%

423

22.90%

Appendicitis Type

0.001

0.422

Perforated

231,732

27.42%

821

33.97%

472

25.59%

Non-Perforated

613,320

72.58%

1596

66.03%

1,373

74.41%

Surgery Type¹

<0.001

0.486

Open

183,078

21.66%

744

30.80%

427

23.15%

Laparoscopic

661,974

78.34%

1672

69.20%

1,418

76.85%