Table 3. Agreement between highest bubble grades from the O’Dive and 2D cardiac imaging; weighted Kappa: 0.30 (SE 0.045) .

Highest grades O’Dive	Highest grades 2D cardiac imaging					Total
	0	1	2	3	4
0	8	13	11	12	2	46
1	4	9	5	16	5	29
2	2	1	5	16	9	28
3	0	0	3	16	9	28
4	0	0	0	3	9	12
Total	14	23	24	63	28	152