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Table 4 Pairwise comparisons of local control of different size tumors

From: Clinical Analysis of stereotactic body radiation therapy using extracranial gamma knife for patients with mainly bulky inoperable early stage non-small cell lung carcinoma

  Tumor size ≤3 cm 3~5 cm 5~7 cm >7 cm
Method   Chi-Square Sig Chi-Square Sig Chi-Square Sig Chi-Square Sig
Log Rank (Mantel-Cox) ≤3 cm    .002 .961 4.638 .031 .895 .344
  3~5 cm .002 .961    10.977 .001 4.541 .033
  5~7 cm 4.638 .031 10.977 .001    .108 .742
  >7 cm .895 .344 4.541 .033 .108 .742