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Table 1 Associations of hospitalization for JDM in US children

From: Inpatient burden of juvenile dermatomyositis among children in the United States

Variable

Primary diagnosis of JDM

No

Yes

Freq

Row Percent

[95% CI]

Freq

Percent

[95% CI]

Crude OR

[95% CI]

P

Adjusted OR

[95% CI]

P

Age

 0–5

12,470,783

55.00 [54.35–55.64]

1077

25.18 [19.85–30.52]

Reference

Reference

 6–11

3,371,272

14.87 [14.65–15.09]

1686

39.42 [33.59–45.25]

5.79 [4.23–7.93]

<.0001

4.62 [4.18–5.10]

<.0001

 11–17

6,832,983

30.13 [29.47–30.80]

1514

35.39 [29.87–40.91]

2.565 [1.872–3.514]

<.0001

1.86 [1.67–2.06]

<.0001

Season

 Fall

5,305,485

25.01 [24.89–25.14]

958

25.29 [21.95–28.64]

1.21 [0.97–1.52]

0.0980

1.18 [1.06–1.33]

0.004

 Winter

6,135,926

28.93 [28.69–29.17]

916

24.18 [20.81–27.54]

Reference

Reference

 Spring

5,007,154

23.61 [23.51–23.71]

892

23.53 [20.49–26.57]

1.19 [0.97–1.46]

0.0931

1.13 [1.01–1.27]

0.0349

 Summer

4,761,755

22.45 [22.29–22.61]

1023

27.00 [23.73–30.27]

1.44 [1.15–1.80]

0.0015

1.53 [1.37–1.71]

<.0001

Gender

 Female

10,343,988

54.16 [54.03–54.30]

2753

64.74 [59.70–69.70]

2.170 [1.739–2.708]

<.0001

2.22 [2.05–2.42]

<.0001

 Male

12,222,939

45.84 [45.70–45.97]

1499

35.26 [30.21–40.30]

Reference

Reference

Race

 White

9,127,707

51.60 [49.63–53.57]

1712

51.83 [43.21–60.45]

Reference

Reference

 Black

2,970,647

16.79 [15.48–18.11]

529

16.02 [11.32–20.71]

0.949 [0.650–1.388]

0.7889

0.83 [0.73–0.94]

0.0026

 Hispanic

3,975,465

24.47 [20.45–24.50]

811

24.56 [17.39–31.72]

1.088 [0.731–1.619]

0.6781

1.01 [0.91–1.13]

0.8044

 Other

1,615,416

9.13 [8.24–10.03]

251

7.60 [3.71–11.48]

0.828 [0.462–1.485]

0.5271

0.60 [0.51–0.71]

<.0001

Insurance

 Medicaid

10,669,493

46.42 [45.17–47.66]

1530

35.47 [30.99–39.95]

0.658 [0.538–0.805]

<.0001

0.71 [0.65–0.78]

<.0001

 Private insurance

10,435,364

45.40 [44.06–46.74]

2273

52.71 [47.02–58.40]

Reference

Reference

 Self-pay

855,164

3.72 [3.28–4.16]

105

2.44 [0.21–4.66]

0.564 [0.226–1.408]

0.2197

0.57 [0.43–0.76]

<.0001

 No charge

43,330

0.19 [0.12–0.26]

9

0.20 [0.00–0.48]

0.903 [0.226–3.606]

0.8850

1.91 [0.97–3.76]

0.0595

 Non-Medicaid government program

888,190

3.86 [3.53–4.20]

396

9.18 [5.08–13.29]

2.047 [1.253–3.344]

0.0043

2.59 [2.26–2.97]

<.0001

Number of Chronic Conditions

 0–1

16,472,397

71.53 [70.36–72.70]

2479

57.42 [50.81–64.03]

Reference

Reference

 2 to 5

5,928,336

25.74 [24.77–26.72]

1682

38.96 [33.40–44.52]

1.885 [1.451–2.449]

<.0001

1.41 [1.30–1.54]

<.0001

 6+

627,835

2.73 [2.48–2.97]

156

3.62 [1.47–5.76]

1.653 [0.844–3.236]

0.1426

1.24 [1.00–1.52]

0.046

Hospital Location

 Metropolitan >1million

7,153,680

37.36 [33.68–41.04]

19,300

51.32 [40.24–62.41]

Reference

Reference

 Fringe/Metro < 1 million

9,216,267

48.13 [44.80–51.47]

1624

43.19 [32.59–53.79]

0.653 [0.431–0.989]

0.0443

0.70 [0.64–0.77]

<.0001

 Micropolitan

1,736,350

9.07 [8.20–9.94]

139

3.69 [1.48–5.91]

0.296 [0.154–0.572]

0.0003

0.27 [0.21–0.35]

<.0001

 Not metropolitan or micropolitan

1,041,038

5.44 [4.92–5.95]

67

1.79 [0.73–2.86]

0.240 [0.127–0.454]

<.0001

0.25 [0.18–0.34]

<.0001

Region

 Northeast

4,281,720

18.59 [15.96–21.23]

814

18.87 [7.69–30.04]

Reference

Reference

 Midwest

4,853,593

21.08 [17.99–24.16]

883

20.45 [10.90–29.99]

0.956 [0.463–1.976]

0.9035

0.82 [0.71–0.94]

0.0047

 South

8,992,204

39.05 [35.41–42.69]

1450

33.59 [21.57–45.61]

0.848 [0.421–1.708]

0.6441

0.83 [0.74–0.94]

0.0020

 West

4,901,051

21.28 [18.32–24.25]

1170

27.10 [15.36–38.84]

1.255 [0.599–2.632]

0.5470

1.23 [1.11–1.36]

<.0001

  1. Missing data was encountered in 74,174 (1.7%) for age, 400,342(10.5%) for season, 96,625 (2.3%) for sex, 1,120,507 (26.2%) for race, 8898, (0.2%) for insurance, 0 (0.0%) for number of chronic conditions, 830,247 (19.7%) for hospital location, and 0 (0.0%) for region
  2. There was no significant differences of missing values for season (p = 0.37), race/ethnicity (p = 0.76), or hospital location (p = 0.14) between hospitalizations with a primary, secondary, or no diagnosis of JDM. 95% CI 95% confidence interval; OR odds ratio