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["Supplementary Table 2. Postoperative atelectasis incidence among the three groups."]
["Variable","Group R(n=30)","Group P(n=30)","Group C(n=30)","c2","P value"]
["Postoperative atelectasis, n (%)",{"$nulls":3},8.956,0.015]
["No","16 (53.3%)a","17 (56.7%)a","26(86.7%)"]
["Yes","14 (46.7%)a","13 (43.3%)a","4(13.3%)"]
["Abbreviations: n, number of patients. Values are expressed as n (%). ᵃP < 0.05 vs. Group C."]

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