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Table 6 Comparison of 6MWD, muscle strength, and HADS before and after surgery

From: Changes in exercise capacity, muscle strength, and health-related quality of life in esophageal cancer patients undergoing esophagectomy

  Before After surgery P value Changes
6MWD, m (n = 32) 494 ± 76 409 ± 108 0.001 > * −85 ± 88
Desaturation during 6MWTa N = 5 N = 5 1  
Hand grip strength, kgf (n = 33)
 Right 30.6 ± 9.1 28.7 ± 8.6 0.01* −1.9 ± 3.9
 Left 28.8 ± 8.6 27.5 ± 7.7 0.01* −1.3 ± 2.8
Isometric knee extensor muscle strength, kgf (n = 31)
 Right 26.0 ± 8.5 24.7 ± 8.2 0.08 −1.3 ± 3.8
 Left 25.2 ± 9.4 22.9 ± 7.8 0.02* −2.3 ± 4.9
 HADS anxiety (n = 23) 5.4 ± 2.9 5.1 ± 4.0 0.76 −0.3 ± 4.0
  Scores ≥ 8 N = 4 N = 8 0.31  
 HADS depression (n = 23) 5.7 ± 3.7 5.4 ± 3.8 0.54 −0.3 ± 2.3
  Scores ≥ 8 N = 6 N = 7 1  
 CAT (n = 24) 10.4 ± 5.6 15.9 ± 7.3 0.02* 5.5 ± 7.5
  1. Values are mean ± SD and compared by paired t-test or Fisher’s exact test. aDesaturation was defined as a fall in SpO2 ≥ 4 % or SpO2 < 90 % during the 6MWT. *P <0.05