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Table 3 Spearman’s Correlation coefficient and intraclass correlation coefficient between the rapid shallow breathing index measured by the 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

  r P value ICC 95% CI P value
Average RSBIvent at different time points      
 0–15 s 0.70  < 0.001 0.73 0.52–0.85  < 0.001
 0–30 s 0.72  < 0.001 0.74 0.53–0.85  < 0.001
 0–45 s 0.74  < 0.001 0.73 0.52–0.85  < 0.001
 0–60 s 0.76  < 0.001 0.79 0.61–0.88  < 0.001
  1. CI confidence interval, ICC intraclass correlation coefficient, r Spearman’s correlation coefficient, RSBIstandard rapid shallow breathing index measured by the Wright spirometer, RSBIvent rapid shallow breathing index displayed by the ventilator