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Table 4 Agreement of rapid shallow breathing index value measured by Wright spirometer and the average rapid shallow breathing index value displayed by the ventilator at different time points

From: Validation of rapid shallow breathing index displayed by the ventilator compared to the standard technique in patients with readiness for weaning

  Mean difference Upper limit Lower limit
RSBIstandard—RSBIvent 0–15 s − 20.7 44.3 − 85.8
RSBIstandard—RSBIvent 0–30 s − 20.3 44.6 − 85.2
RSBIstandard—RSBIvent 0–45 s − 19.0 47.7 − 85.8
RSBIstandard—RSBIvent 0–60 s − 17.1 42.4 − 76.6
  1. RSBIstandard rapid shallow breathing index measured by the Wright spirometer, RSBIvent rapid shallow breathing index displayed by the ventilator