Skip to main content

Table 5 Rates of failure and impact of PET-CT planning vs. non-PET-CT planning on failure

From: A retrospective, deformable registration analysis of the impact of PET-CT planning on patterns of failure in stereotactic body radiation therapy for recurrent head and neck cancer

  Overall Cohort (n = 96) Definitive SBRT Subgroup (n = 89)
  Total PET-CT Non-PET-CT p (X2)* Total PET-CT Non-PET-CT p (X2)*  
Number of patients: 96 45 51   89 45 44   
Failure vs. No Failure:
  % No Failure (n) 51% (49) 62% (28) 41% (21) 0.044 49% (44) 62% (28) 36% (16) 0.020  
  % Overall (Any) Failure (n) 49% (47) 38% (17) 59% (30) 0.044 51% (45) 38% (17) 64% (28) 0.020  
Type of Failure:
  % In-field (n) 7% (7) 11% (5) 4% (2) 0.247 8% (7) 11% (5) 5% (2) 0.434  
  % Overlap (n) 15% (14) 11% (5) 18% (9) 0.401 16% (14) 11% (5) 20% (9) 0.258  
  % Marginal (n) 22% (21) 13% (6) 29% (15) 0.083 22% (20) 13% (6) 32% (14) 0.045  
  % Regional/Distant (n) 16% (15) 13% (6) 18% (9) 0.588 16% (14) 13% (6) 18% (8) 0.573  
Combined Failure Categories:
  % In-field/Overlap/Marginal (n) 43% (41) 33% (15) 51% (26) 0.100 45% (40) 33% (15) 57% (25) 0.034  
  % Overlap/Marginal (n) 36% (35) 24% (11) 47% (24) 0.033 38% (34) 24% (11) 52% (23) 0.009  
  1. Abbreviations: SBRT = stereotactic body radiation therapy, *Chi-square comparison of PET-CT vs. non-PET-CT planning.