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Table 3 Correlation between restrictive preoperative PFTs and postoperative pulmonary complications in patients with extremely severe scoliosis

From: The role of preoperative pulmonary function tests in the surgical treatment of extremely severe scoliosis

Preoperative PFTs Pulmonary complication χ 2 P
Yes No
FVC ratio     
 ≤65% 7 17 4.581 0.032
 >65% 2 34   
FEV1 ratio     
 ≤65% 6 15 3.173 0.075
 >65% 3 36   
PEF ratio     
 ≤65% 5 10 3.529 0.060
 >65% 4 41