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Table 1 Characteristics of pediatric emergency department patients, N (%)

From: Impact of the South Korean government’s medical school expansion announcement on pediatric emergency department visits

Variables/Category

Pre COVID-19

COVID-19 pandemic

Post COVID-19

After residents’ resignation

P

Feb 19– May 12, 2019

Feb 19– May 12, 2020

Feb 19– May 12, 2021

Feb 19– May 12, 2022

Feb 19– May 12, 2023

Feb 19– May 12, 2024

Total visit

 

2,956

1,003

1,470

1,378

3,164

1,603

 

Weekly visit,

mean ± SD †

 

246.3 ± 45.2 a

83.6 ± 12.5 c

122.5 ± 18.9 b

114.8 ± 17.9 b

263.7 ± 61.2 a

133.6 ± 22.4 b

< 0.001*

Age*

0-12months

293 (9.9%) a

130 (13.0%) b

162 (11.0%) ab

199 (14.4%) b

354 (11.2%) ab

231 (14.4%) b

< 0.001

1-3years

852 (28.8%) a

279 (27.8%) a

430 (29.3%) a

326 (23.7%) b

913 (28.9%) a

450 (28.1%) a

3-7years

942 (31.9%) b

298 (29.7%) a

392 (26.7%) b

376 (27.3%) b

1126 (35.6%) a

476 (29.7%) a

7-14years

869 (29.4%) a

296 (29.5%) a

486 (33.1%) a

477 (34.6%) a

771 (24.4%) b

446 (27.8%) ab

Female

 

1,323 (44.8%) a

408 (40.7%) b

627 (42.7%) ab

553 (40.1%) b

1319 (41.7%) b

685 (42.7%) ab

0.041

KTAS level*

Level 1

3 (0.1%)

4 (0.4%)

1 (0.1%)

1 (0.1%)

2 (0.1%)

2 (0.1%)

< 0.001

 

Level 2

73 (2.5%) a

31 (3.1%) ab

62 (4.2%)

68 (4.9%) b

132 (4.2%) b

81 (5.1%) b

 
 

Level 3

1,445 (48.9%) a

354 (35.3%) b

746 (50.7%)

728 (52.8%) a

1,992 (63.0%) c

1,077 (67.2%) c

 
 

Level 4

1,323 (44.8%) a

579 (57.7%) b

627 (42.7%)

556 (40.3%)

963 (30.4%) c

397 (24.8%) c

 
 

Level 5

112 (3.8%)

35 (3.5%)

34 (2.3%)

25 (1.8%)

75 (2.4%)

46 (2.9%)

 

PED Length of stay, median (IQR) §

 

124.0 (71.0-255.0) a

103.0 (54.0-239.5) b

125.0 (60.0-300.0)

130.0 (63.0-299.0) a

133.5 (61.0-231.0) a

106.0 (45.0-186.5) b

< 0.001

Arrival mode*

Self-referred

2,600 (88.0%) a

835 (83.3%) b

1,201 (81.7%)

1,153 (83.7%) b

2,687 (84.9%) b

1,308 (81.6%) b

< 0.001

Referred from clinic

278 (9.4%) a

114 (11.4%) ab

174 (11.8%)

166 (12.0%) b

371 (11.7%) b

271 (16.9%) c

Outpatient department

78 (2.6%) a

54 (5.4%) b

95 (6.5%)

59 (4.3%) ab

106 (3.4%) a

24 (1.5%) a

Disposition*

Discharge

2,624 (88.8%) a

856 (85.3%) ab

1,221 (83.1%)

1,140 (82.7%) b

2,758 (87.2%) a

1,381 (86.2%) ab

< 0.001

 

Hospitalization

      
 

Ward

327 (11.1%) a

138 (13.8%) ab

244 (16.6%)

232 (16.8%) b

399 (12.6%) a

219 (13.7%) ab

 

PICU

5 (0.2%)

8 (0.8%)

5 (0.3%)

6 (0.4%)

7 (0.2%)

3 (0.2%)

 

Mortality

0 (0.0%)

1 (0.1%)

0 (0.0%)

0 (0.0%)

0 (0.0%)

0 (0.0%)

  1. All values are frequencies (%) except where otherwise indicated.
  2. † One-way ANOVA with Tukey’s post-hoc test
  3. § Kruskal-Wallis test with Dunn’s post-hoc test
  4. Chi-square test with Bonferroni-adjusted standardized residuals
  5. Different superscript letters (a, b, c) indicate significant differences between groups (P < 0.05)
  6. PED, Pediatric Emergency Department; KTAS, Korean Triage and Acuity Scale; PICU, Pediatric Intensive Care Unit; IQR, Interquartile Range; SD, Standard Deviation