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Table 3 Comparison between mean ADC before and during treatment

From: Diffusion-weighted magnetic resonance imaging (DWMRI) of head and neck squamous cell carcinoma: could it be an imaging biomarker for prediction of response to chemoradiation therapy

  ADCpre ADCmid P
Total (n = 29)    
Min.–Max. 0.7–1.4 0.9–1.9 < 0.001
Mean ± SD 1 ± 0.2 1.3 ± 0.2
Median (IQR) 1.0 (0.9–1) 1.3(1.1–1.4)
Local control (n = 15)    
Min.–Max. 0.7–1.2 0.9–1.9 0.001
Mean ± SD 0.9 ± 0.1 1.3 ± 0.3
Median (IQR) 0.9(0.8–1) 1.3(1–1.1)
Local failure (n = 14)    
Min.–Max. 0.8–1.4 1–1.6 0.002
Mean ± SD 1 ± 0.2 1.2 ± 0.2
Median (IQR) 1(1.1–1.4) 1.2(1.1–1.4)
  1. P P value for comparing between pretreatment and midtreatment mean ADC using Wilcoxon signed-ranks test
  2. Statistically significant at p ≤ 0.05