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Table 2 Interobserver variability of the organs at risk described by 3 different endpoints

From: 3D Variation in delineation of head and neck organs at risk

OAR ICC CI (min-max) 3D SD (mm)
    Global Region
     cranial caudal medial lateral anterior posterior
Spinal cord 0.32 0.64 (0.41-0.83) 1.5 2.1 2.4 0.9 - - -
Parotid gland left 0.65 0.69 (0.43-0.83) 2.6 3.3 2.8 2.8 1.2 2.0 1.9
Parotid gland right 0.86 0.71 (0.50-0.86) 2.0 2.8 2.4 2.4 0.9 1.5 1.5
Submandibular gland left 0.61 0.70 (0.46-0.85) 1.8 2.9 0.7 1.7 1.7 1.6 1.4
Submandibular gland right 0.60 0.71 (0.36-0.83) 1.5 2.7 0.8 1.4 1.1 1.4 1.3
Thyroid cartilage 0.83 0.66 (0.30-0.80) 0.9 1.0 0.9 1.0 0.8 - -
Glottic larynx 0.27 0.37 (0.11-0.81) 3.9 3.7 5.0 5.0 2.4 - 4.3
  1. OAR = organ at risk, ICC = intraclass correlation coefficient, CI = concordance index and SD = standard deviation