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Table 1 The reliability for the measurement of various cephalometric variables

From: Effects of twin-block appliance on the anatomy of pharyngeal airway passage (PAP) in class II malocclusion subjects

Parameter Method error Mode of variance Reliability
SNA (°) 0.52 3.66 0.92
Maxillary length (mm) 0.68 19.84 0.98
Effective maxillary length (mm) 0.46 21.15 0.99
SNB (°) 0.45 2.77 0.93
Mandibular length (mm) 0.49 19.44 0.99
Effective mandibular length (mm) 0.84 37.04 0.98
FMA(°) 0.35 14.23 0.99
Depth of the nasopharynx [DNP] (mm) 0.54 19.40 0.99
Height of the nasopharynx [HNP] (mm) 0.61 3.61 0.90
Depth of the oropharynx [DOP] (mm) 0.57 9.06 0.96
Depth of the hypopharynx [DHP] (mm) 0.54 12.41 0.98
Soft palate length [SPL] (mm) 1.00 11.26 0.91
Soft palate thickness [SPT] (mm) 0.38 1.51 0.90
Soft palate inclination [SPI] (°) 1.67 32.01 0.91
PPWT 1 at nasopharyngeal space 1 (mm) 0.69 9.82 0.95
PPWT 2 at nasopharyngeal space 2 (mm) 0.65 7.36 0.94
PPWT 3 at oropharyngeal space 1 (mm) 0.60 1.57 0.77
PPWT 4 at oropharyngeal space 2 (mm) 0.53 6.36 0.96
PPWT 5 at hypopharyngeal space 1 (mm) 0.29 0.77 0.89
PPWT 6 at hypopharyngeal space 2 (mm) 0.30 1.15 0.92