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Table 3 Estimated differences in observed and predicted rates and counts of intensive care admissions, 2007–2010

From: The impact of influenza A(H1N1)pdm09 compared with seasonal influenza on intensive care admissions in New South Wales, Australia, 2007 to 2010: a time series analysis

 

Influenza season

 

2007 (15 weeks)

2008 (16 weeks)

2009 (19 weeks)

2010 (12 weeks)

 

Rate difference per 100,000 (95% CI)

Count difference (95% CI)

Rate difference per 100,000 (95% CI)

Count difference (95% CI)

Rate difference per 100,000 (95% CI)

Count difference (95% CI)

Rate difference per 100,000 (95% CI)

Count difference (95% CI)

ARDS

−0.05 (−0.19 to 0.10)

−3 (−13 to 7)

−0.08 (−0.22 to 0.068)

−5 (−15 to 5)

0.47 (0.29 to 0.65)

34 (21 to 46)

−0.02 (−0.15 to 0.12)

−1 (−11 to 9)

Respiratory failure

0.60 (0.068 to 0.94)

35 (5 to 65)

0.55 (0.12 to 0.96)

38 (8 to 68)

−0.21 (−0.74 to 0.32)

−15 (−53 to 23)

−0.27 (−0.68 to 0.13)

−20 (−49 to 9)

Mechanical ventilation

1.45 (0.75 to 2.14)

100 (52 to 148)

0.45 (−0.22 to 1.13)

32 (−15 to 79)

0.27 (−0.57 to 1.11)

19 (−41 to 79)

−0.069 (−0.71 to 0.57)

−5 (−51 to 41)

ECMO*

−0.05 (−0.06 to −0.03)

−3 (−4 to −2)

0.01 (−0.01 to 0.03)

0 (−1 to 2)

0.30 (0.28 to 0.32)

21 (20 to 23)

0.05 (0.03 to 0.06)

3 (2 to 4)

  1. ARDS=Acute respiratory distress syndrome; ECMO=Extracorporeal membrane oxygenation.
  2. *Because of small numbers of influenza diagnoses outside of influenza seasons, predicted values were based on a constant mean value outside of the influenza seasons. All other predicted values were based on the seasonally oscillating predicted values from the time series model.
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BMC Public Health

ISSN: 1471-2458

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