Table 1 Baseline characteristics of subjects with and without inflammatory bowel disease

Age (years), mean (SD)

31.5

21.5

31.5

21.5

< .0001

Sex, male, n (%)

26,654

49.1

26,654

49.1

< .0001

Monthly insurance premium (U.S. dollars), n (%)

< .0001

 0–500

26,745

49.3

26,745

49.3

 501–800

14,745

27.2

14,745

27.2

 ≥ 801

12,803

23.6

12,803

23.6

Coexisting diseases, n (%)

 Hypertension

6148

11.3

4643

8.6

0.1718

 Diabetes mellitus

2726

5.0

2057

3.8

0.1624

 Coronary artery disease

2330

4.3

1515

2.8

0.2459

 Chronic obstructive pulmonary disease

2398

4.4

1471

2.7

0.2792

 Chronic liver disease

3513

6.5

2482

4.6

0.2026

 Chronic kidney disease

239

0.4

218

0.4

0.0509

 Cerebrovascular disease

1118

2.1

949

1.8

0.0921

 Major depressive disorder

436

0.8

251

0.5

0.3063

 Anxiety disorder

4498

8.3

2567

4.7

0.3302

 Thyroid disease

680

1.3

368

0.7

0.3417

 Sleeping disorder

4679

8.6

2625

4.8

0.3410

 Cancer

1026

1.9

730

1.3

0.1907

Charlson comorbidity index score

0.0348

 0

49,761

91.7

50,450

92.9

 1

3492

6.4

2847

5.2

 2

850

1.6

784

1.4

 ≥ 3

190

0.4

212

0.4

Use of systemic corticosteroids, n (%)

9344

17.2

6949

12.8

0.1919

Number of hospitalizations, n (%)

0.0864

 0

47,354

87.2

48,940

90.1

 1

5019

9.2

3986

7.3

 2

1233

2.3

821

1.5

 ≥ 3

687

1.3

546

1.0

Number of emergency room visits, n (%)

0.1569

 0

39,119

72.1

42,680

78.6

 1

9560

17.6

7810

14.4

 2

3013

5.6

2197

4.1

 ≥ 3

2601

4.8

1606

3.0