Table 3.

A univariate analysis of channel characteristics and the primary endpoint (slow conduction properties)

	Total (n = 109)	Slow conduction (n = 83)	Non-slow conduction (n = 26)	OR	P-value
Length per channel (mm)	57.91 ± 63.07 (4.16–338.10)	67.81 ± 68.45	26.31 ± 21.25	1.03 (1.01–1.06)	0.01
Mass per channel (g)	2.06 ± 2.67 (0.01–14.59)	2.41 ± 2.91	0.87 ± 0.86	2.46 (1.23–4.92)	0.01
Width per channel (mm)	5.02 ± 1.82 (0.01–9.34)	5.23 ± 1.51	4.38 ± 2.50	1.29 (0.90–1.67)	0.06
Protectedness per channel (mm)	21.44 ± 25.39 (0.01–143.51)	24.97 ± 27.72	10.19 ± 9.52	1.08 (1.01–1.2)	0.02
Layers affected by CMR channels
Exclusively endocardium	38 (34.9%)	25	13	0.35 (0.11–1.07)	0.06
Exclusively mesocardium	2 (1.8%)	2	0	NA	NA
Exclusively epicardium	18 (16.5%)	15	3	1.63 (0.40–6.72)	0.50
Exclusively endo/meso	20 (18.3%)	13	7	0.56 (0.18–1.78)	0.32
Exclusively meso/epi	7 (6.4%)	6	1	NA	NA
Transmural	24 (22.0%)	22	2	6.42 (1.11–37.28)	0.04
Number of layers per channel	3.17 ± 2.36 (1–9)	3.43 ± 2.50	2.31 ± 1.62	1.44 (1.01–1.95)	0.02
Number of AHA segments per channel	2.30 ± 1.37 (1–8)	2.48 ± 1.47	1.77 ± 0.82	2.09 (1.13–3.86)	0.02

CMR, cardiac magnetic resonance; OR, odds ratio.

Bold values denote statistical significance (p < 0.05).