Table 1.

Historical characteristics and intra-procedural findings divided by sex (left) and by White versus not White (right). Age is displayed as median and (interquartile range).

Historical characteristics	Male n=170	Female n=112	p value	White n=157	Not White n=124	p value
Age (years)	16 (11–35)	17 (13–36)	0.34	17 (12–37)	16 (11–34)	0.59
Race			0.21	---	---	---
White	100 (59%)	57 (51%)		---	---	---
Black	5 (3%)	6 (5%)		---	---	---
Asian	17 (10%)	21 (19%)		---	---	---
Latino	28 (17%)	13 (12%)		---	---	---
Native-American	2 (1%)	1 (1%)		---	---	---
Other	17 (10%)	14 (13%)		---	---	---
Foreign-born*	23 (15%)	16 (16%)	0.95	4 (3%)	35 (31%)	<0.001
History of Syncope	16 (9%)	10 (9%)	0.89	11 (7%)	15 (12%)	0.16
History of cardiac arrest	2 (1%)	0 (0%)	0.25	2 (1%)	0 (0%)	0.20
History of atrial fibrillation	12 (7%)	3 (3%)	0.11	12 (8%)	3 (2%)	0.048
Intra-procedural characteristics
Dual node physiology	30 (18%)	15 (14%)	0.34	29 (19%)	16 (13%)	0.18
AVNRT elicited during the case	3 (2%)	3 (3%)	0.60	3 (2%)	3 (2%)	0.79
Any anterograde conducting accessory pathway	102 (60%)	75 (67%)	0.24	99 (63%)	78 (62%)	0.79
Any dangerous accessory pathway †	8 (5%)	3 (3%)	0.39	6 (4%)	5 (4%)	0.96

^*Birth outside of North America

^†A pathway was considered “dangerous” if anterograde conduction demonstrated an R-R interval during AF < 250 ms, the anterograde block cycle length was < 250 ms, or the anterograde refractory period (at any drive cycle length) was < 250 ms.