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Table 4 The comparison of postoperative pulmonary function \( \left(\overline{\mathrm{x}}\pm \mathrm{s}\right) \)

From: Clinical observation of modified gastric tube in middle and lower thoracic esophageal carcinoma surgery

 Clinical parametersModified gastric tubeConventional gastric tubeχ2P
 VC%85.10 ± 6.6786.39 ± 6.880.7970.428
3 days before surgeryMVV%79.91 ± 6.4579.53 ± 6.400.2460.807
 FEV1%89.80 ± 10.9886.03 ± 12.764.3240.190
 VC%74.50 ± 7.5273.96 ± 7.800.2950.769
6 weeks after surgeryMVV%69.31 ± 7.4468.00 ± 6.990.7570.452
 FEV1%72.77 ± 5.4668.79 ± 11.251.8840.064