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Table 6 Clinical relevance in measuring the impact of preoperative physiotherapy and the presence of atelectasis

From: Respiratory physiotherapy and incidence of pulmonary complications in off-pump coronary artery bypass graft surgery: an observational follow-up study

    Preoperative physiotherapy
    Yes No
Postoperative Atelectasis    17.3% 36.3%
   95% CI   
RR 0.48 0.31 – 0.73   
RRR 52% 24% – 70%   
ARR 0.19 0.08 – 0.29   
NNT 5 3 – 12   
  1. CI: confidence interval; RR: Relative Risk; RRR: Relative Risk Reduction; ARR: Absolute Risk Reduction; NNT: Number Needed to Treat