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

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

			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

CI: confidence interval; RR: Relative Risk; RRR: Relative Risk Reduction; ARR: Absolute Risk Reduction; NNT: Number Needed to Treat

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