Evidence of Second Canal between Permanent Mandibular Central and Lateral Incisors in China; a Systematic Review on CBCT Studies

Table 1

Weighted means values for both inter- and intraexaminer reproducibility.

Studies	Types of examiner	Interexaminer reproducibility (Kappa)	Intraexaminer reproducibility (Kappa)	Number of calibrated teeth
Lin et al. [13]	Endodontist versus radiologist	0.91	0.92	200
Ying et al. [9]	Endodontist versus radiologist	0.96	—	424
Zhengyan et al. [14]	Investigator	—	0.82	200
Weighted mean value ± SD		0.93 ± 0.02	0.87 ± 0.05

SD: Standard Deviation.