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Table 4 Vac-1 group: proportions of VAHL reports in time periods segmented using CHAID algorithm (Pv < 0.01)

From: Hypermetabolic lymphadenopathy following administration of BNT162b2 mRNA Covid-19 vaccine: incidence assessed by [18F]FDG PET-CT and relevance to study interpretation

  0–5 days (n = 54) 6–12 days (n = 106) 13+ days (n = 150) Pv
No HLN 50 (92.6%) 56 (52.8%) 113 (75.3%) <0.01 a,b,c
Grade 1 VAHL 2 (3.7%) 25 (23.6%) 13 (8.7%) <0.01 a,c
Grade 2 VAHL 2 (3.7%) 20 (18.9%) 18 (12.0%) 0.02 a
Grade 3 VAHL 0 (0.0%) 3 (2.8%) 4 (2.7%) 0.47
Grade 4 VAHL 0 (0.0%) 2 (1.9%) 2 (1.3%) 0.61
  1. Categorical variables are reported as frequency and percentage
  2. aa significant difference was found between 0 and 5 days and 6–12 days groups
  3. ba significant difference was found between 0 and 5 days and 13+ days groups
  4. ca significant difference was found between 6 and 12 days and 13+ days groups
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