. Author manuscript; available in PMC: 2016 Oct 28.

Published in final edited form as: Circ Cardiovasc Imaging. 2016 Oct;9(10):e005131. doi: 10.1161/CIRCIMAGING.116.005131

Table 4.

Kappa Statistics for Interobserver and Scan-rescan agreement for 18F-Fluoride PET signal distribution.

a) Right Coronary Cusp
		Scan 1 (Reading 2)				Scan 2
		Absence	Presence			Absence	Presence
Scan 1 (1^st Reading)	Absence	2	0	Scan 1 (1^st Reading)	Absence	2	0
	Presence	0	13		Presence	1	12
Intra-observer agreement		1.00, 95% CI ( -, - )		Scan/Rescan agreement		0.76, 95% CI (0.32, 1.00)

b) Non Coronary Cusp
		Scan 1 (Reading 2)				Scan 2
		Absence	Presence			Absence	Presence
Scan 1 (1^st Reading)	Absence	1	1	Scan 1 (1^st Reading)	Absence	1	1
	Presence	0	13		Presence	0	13
Intra-observer agreement		0.63, 95% CI (0.00, 1.00)		Scan/Rescan agreement		0.63, 95% CI (0.00, 1.00)

c) Left Coronary Cusp
		Scan 1 (Reading 2)				Scan 2
		Absence	Presence			Absence	Presence
Scan 1 (1^st Reading)	Absence	2	1	Scan 1 (1^st Reading)	Absence	3	0
	Presence	1	11		Presence	1	11
Intra-observer agreement		0.58, 95% CI (0.07, 1.00)		Scan/Rescan agreement		0.81, 95% CI (0.47, 1.00)

The numbers of presence or absence of 18F-Fluoride for right (a), non (b) and left (c) coronary cusps are provided in the tables below. Kappa statistics and 95% confidence intervals for intra-observer [i.e. Scan 1 (1^st Reading) vs. Scan 1 (2^nd Reading)] and scan/rescan [i.e. Scan 1 (1^st Reading) vs. Scan 2] agreement are also shown.