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Table 3 The results of interrupted time-series analysis for ICU and HDU patients

From: Impact of the COVID-19 pandemic on critical care utilization in Japan: a nationwide inpatient database study

Variables

Before COVID-19 pandemic

During COVID-19 pandemic

Level change, %

(95% CIs)

Trend change, % per month

(95% CIs)

ICU

    

 ICU bed occupancy, %

51.5

47.5

− 4.29 (− 5.69, − 2.88)

0.31 (0.11, 0.51)

  Invasive mechanical ventilation, %

21.1

19.2

− 2.40 (− 2.80, − 2.01)

0.13 (0.07, 0.18)

  Extracorporeal membrane oxygenation, %

0.6

0.7

− 0.08 (− 0.13, − 0.04)

0.00 (0.00, 0.01)

  Without any organ support, %

24.1

22.3

− 1.58 (− 2.41, − 0.75)

0.17 (0.05, 0.29)

HDU

    

 HDU bed occupancy, %

46.9

44.8

− 8.12 (− 9.02, − 7.22)

1.23 (1.10, 1.36)

  Invasive mechanical ventilation, %

6.5

5.6

− 1.44 (− 1.64, − 1.24)

0.05 (0.02, 0.08)

  Extracorporeal membrane oxygenation, %

0.0

0.1

0.00 (− 0.01, 0.00)

0.00 (0.00, 0.00)

  Without any organ support, %

38.8

37.6

− 6.46 (− 7.22, − 5.70)

1.16 (1.05, 1.26)

  1. ICU intensive care unit; HDU high-dependency care unit; COVID-19 coronavirus disease 2019; CI confidence interval