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Table 6 Relation between thymectomy of the studied patients and studied scores

From: Determinants of quality of life changes with plasmapheresis in patients with myasthenia gravis

  Thymectomy Test value P value Sig.
Total (81 patients) Negative
(29 patients)
Positive
(52 patients)
Initial QMG score Mean ± SD 23.34 ± 3.15 26.92 ± 3.78 −4.322a 0.001 HS
Range 18-30 19-34
QMG score after 1 month Mean ± SD 17.62 ± 2.65 18.29 ± 4.75 −0.697a 0.488 NS
Range 12-22 11-30
QMG change Median (IQR) −19.23 (−33.33-−11.11) −32.07 (−42.21-−21.13) −2.660b 0.008 HS
Range −55.56-0 −58.06-0
Test value 5.888 9.011    
P value 0.001 0.001
Initial QOL score Mean ± SD 44.17 ± 4.44 47.75 ± 4.65 −3.374a 0.001 HS
Range 36-53 39-57
QOL score after 1 month Mean ± SD 37.76 ± 5.05 38.69 ± 7.47 −0.600a 0.550 NS
Range 30-48 25-54
QOL change Median (IQR) −12.5 (−20.93-−8.33) −17.21 (−29.41-−10.42) −1.734b 0.083 NS
Range −35.29-4.44 −50-8.16
Test value 5.150 7.360    
P value 0.001 0.001
  1. NS non-significant, S significant, HS highly significant, QOL quality of life, QMG quantitative myasthenia gravis, SD standard deviation
  2. aIndependent t test
  3. bMann-Whitney test