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Table 7 Healthcare resource use during baseline and post-acute phasesa stratified by disposition during acute COVID-19

From: Substantial health and economic burden of COVID-19 during the year after acute illness among US adults at high risk of severe COVID-19

Visit or Procedure

No Hospitalization (n = 15,457)

Hospitalization Without ICU Admission (n = 2916)

ICU Admission (n = 1185)

Baseline Phase

Post-Acute Phase

Change From Baseline to Post-Acute Phase, Δ (% Change)

Baseline Phase

Post-Acute Phase

Change From Baseline to Post-Acute Phase, Δ (% Change)

Baseline Phase

Post-Acute Phase

Change From Baseline to Post-Acute Phase, Δ (% Change)

Outpatient lab tests

 Tests, n

28,074

37,092

9018 (32.1)

5694

7323

1629 (28.6)

2461

3301

840 (34.1)

 Patients, n

9941

10,762

821 (8.3)

1778

1975

197 (11.1)

734

828

94 (12.8)

 Mean ± SD

1.8 ± 2.5

2.4 ± 3.2

0.6

2.0 ± 3.0

2.5 ± 3.6

0.6

2.1 ± 3.3

2.8 ± 3.6

0.7

 Median (Q1; Q3)

1 (0; 3)

1 (0; 3)

0

1 (0; 3)

1 (0; 3.5)

0

1 (0; 3)

2 (0; 4)

1

Outpatient visits (specialist or nonspecialist)

 Visits, n

357,264

424,453

67,189 (18.8)

95,986

132,282

36,296 (37.8)

35,055

56,466

21,411 (61.1)

 Patients, n

15,362

15,183

–179 (–1.2)

2882

2878

–4 (–0.1)

1169

1162

–7 (–0.6)

 Mean ± SD

23.1 ± 25.3

27.5 ± 30.5

4.3

32.9 ± 39.0

45.4 ± 49.8

12.4

29.6 ± 40.2

47.7 ± 50.6

18.1

 Median (Q1; Q3)

16 (8; 29)

18 (9; 35)

2

21 (11; 41)

30 (14; 57)

9

17 (9; 34)

33 (17; 61)

16

Emergency department visits

 Visits, n

7753

6196

–1557 (–20.1)

2615

2191

–424 (–16.2)

800

818

18 (2.3)

 Patients, n

4368

3427

–941 (–21.5)

1168

968

–200 (–17.1)

407

361

–46 (–11.3)

 Mean ± SD

0.5 ± 1.4

0.4 ± 1.5

–0.1

0.9 ± 2.3

0.8 ± 2.0

–0.1

0.7 ± 1.5

0.7 ± 4.2

 < 0.1

 Median (Q1; Q3)

0 (0; 1)

0 (0; 0)

0

0 (0; 1)

0 (0; 1)

0

0 (0; 1)

0 (0; 1)

0

Prescription classes

 Prescriptions, n

83,348

82,917

–431 (–0.5)

18,783

20,082

1299 (6.9)

7870

8619

749 (9.5)

 Patients, n

13,958

13,821

–137 (–1.0)

2564

2608

44 (1.7)

1087

1091

4 (0.4)

 Mean ± SD

5.4 ± 3.8

5.4 ± 3.9

–0.0

6.4 ± 4.4

6.9 ± 4.5

0.4

6.6 ± 4.3

7.3 ± 4.5

0.6

 Median (Q1; Q3)

5 (3; 8)

5 (2; 8)

0

6 (3; 9)

7 (4; 10)

1

6 (4; 9)

7 (4; 10)

1

Inpatient visits

 Visits, n

1998

2372

374 (18.7)

1334

1940

606 (45.4)

310

989

679 (219.0)

 Patients, n

1528

1526

–2 (–0.1)

808

886

78 (9.7)

187

465

278 (148.7)

 Mean ± SD

0.1 ± 0.5

0.2 ± 0.6

0.0

0.5 ± 1.0

0.7 ± 1.5

0.2

0.3 ± 0.8

0.8 ± 1.5

0.6

 Median (Q1; Q3)

0 (0; 0)

0 (0; 0)

0

0 (0; 1)

0 (0; 1)

0

0 (0; 0)

0 (0; 1)

0

Inpatient lab tests

 Tests, n

466

684

218 (46.8)

332

504

172 (51.8)

53

557

504 (950.9)

 Patients, n

221

240

19 (8.6)

124

170

46 (37.1)

34

111

77 (226.5)

 Mean ± SD

0.0 ± 0.3

0.0 ± 0.6

0.0

0.1 ± 1.0

0.2 ± 1.2

0.1

0.0 ± 0.3

0.5 ± 3.1

0.4

 Median (Q1; Q3)

0 (0; 0)

0 (0; 0)

0

0 (0; 0)

0 (0; 0)

0

0 (0; 0)

0 (0; 0)

0

Length of hospital stay

 Days, n

10,536

17,390

6854 (65.1)

6639

19,480

12,841 (193.4)

1766

13,440

11,674 (661.0)

 Patients, n

1528

1526

–2 (–0.1)

808

886

78 (9.7)

187

465

278 (148.7)

 Mean ± SD

6.9 ± 8.7

11.4 ± 16.0

4.5 (65.3)

8.2 ± 12.2

22.0 ± 28.2

13.8 (167.6)

9.4 ± 10.4

28.9 ± 36.0

19.5 (206.1)

 Median (Q1; Q3)

4 (3; 7)

5 (3; 12)

1

5 (3; 9)

11 (5; 26)

6

5 (3; 11)

17 (6; 38)

12

Length of ICU stay

 Days, n

470

505

35 (7.4)

365

354

–11 (–3.0)

102

209

107 (104.9)

 Patients, n

377

384

7 (1.9)

284

243

–41 (–14.4)

81

116

35 (43.2)

 Mean ± SD

0.3 ± 0.7

0.3 ± 0.7

0.02 (7.6)

0.5 ± 0.8

0.4 ± 0.9

–0.1 (–11.6)

0.5 ± 0.8

0.4 ± 1.4

–0.1 (–17.6)

 Median (Q1; Q3)

0 (0; 0)

0 (0; 1)

0

0 (0; 1)

0 (0; 1)

0

0 (0; 1)

0 (0; 0)

0

Patients with invasive mechanical ventilation use, n (%)

62 (0.4)

78 (0.5)

16 (25.8)

87 (3.0)

64 (2.2)

–23 (–26.4)

16 (1.4)

68 (5.7)

52 (325.0)

Patients with noninvasive mechanical ventilation use, n (%)

61 (0.4)

61 (0.4)

0 (0.0)

72 (2.5)

50 (1.7)

–22 (–30.6)

14 (1.2)

62 (5.2)

48 (342.9)

Patients with supplemental oxygen use, n (%)

91 (0.6)

107 (0.7)

16 (17.6)

84 (2.9)

148 (5.1)

64 (76.2)

24 (2.0)

103 (8.7)

79 (329.2)

Patients with readmission within 30 days, n (%)

165 (1.1)

348 (2.3)

183 (110.9)

130 (4.5)

477 (16.4)

347 (266.9)

32 (2.7)

319 (26.9)

287 (896.9)

  1. For visits, tests, and prescriptions, means were calculated as the total value divided by the total number of patients within the cohort. For length of hospital stay and ICU stay, means were calculated as the total number of days divided by the number of patients in the cohort with any inpatient hospital stay
  2. ICU intensive care unit, Q1 quartile 1, Q3 quartile 3
  3. aThe baseline period was the 12 months before the index date, and the post-acute phase spanned from 1 to 13 months after the index date