Comparison between tracheal ratio methods used by three observers at three occasions in English Bulldogs

Table 1 Inter-agreement kappa statistics for observers using the TD/TI method

Observer	Occasion 1				Occasion 2				Occasion 3
	κ	P_O	PA	NA	κ	P_O	PA	NA	κ	P_O	PA	NA
A vs. B	0.66/0.52	0.88/0.66	0.74/0.59	0.92/0.93	0.49/0.62	0.82/0.88	0.58/0.79	0.87/0.92	0.67/0.62	0.88/0.88	0.74/0.70	0.92/0.92
B vs. C	0.56/0.70	0.88/0.95	0.63/0.73	0.92/0.97	0.45/0.52	0.89/0.89	0.50/0.57	0.94/0.94	0.69/0.52	0.89/0.89	0.67/0.57	0.94/0.94
A vs. C	0.45/0.36	0.82/0.86	0.55/0.43	0.89/0.92	0.32/0.27	0.79/0.80	0.40/0.35	0.87/0.88	0.45/0.45	0.80/0.84	0.56/0.53	0.87/0.90

Inter-agreement for the TD/TI method (with ratio <0.127 as definition of tracheal hypoplasia) for the different measurement occasions. Kappa (κ), observed agreement (P_O), positive agreement (PA) and negative agreement (NA) values are presented for both right and left lateral recumbent radiographs (RLR/LLR). In total 56 RLR and 56 LLR radiographs.

ISSN: 1751-0147