. 2017 Apr 7;21:16-161. doi: 10.7812/TPP/16-161

Table 1.

Association of study variables, with helmet use and head injury^a

Variable	Boarding			Helmet use			Head injury
Variable	Skateboarding (n = 852)	Snowboarding (n = 890)	p value	Yes	No	p value	Yes	No	p value
Sex
Boys	775 (54.8)	640 (45.2)	< 0.001^b	646 (45.7)	769 (54.3)	< 0.001^b	609 (43.1)	802 (56.9)	< 0.001^b
Girls	77 (23.5)	250 (76.5)	< 0.001^b	189 (57.8)	138 (42.2)	< 0.001^b	95 (29.1)	232 (70.9)	< 0.001^b
Age, years
≤ 12	227 (53.7)	196 (46.3)	0.03^b	251 (59.3)	172 (40.7)	< 0.001^b	160 (37.9)	262 (62.1)	0.46
> 12	625 (47.4)	694 (52.6)	0.03^b	584 (44.3)	735 (55.7)	< 0.001^b	544 (41.3)	772 (58.7)	0.46
Race/ethnicity
Minorities	126 (77.3)	37 (22.7)	< 0.001^b	45 (27.6)	118 (72.4)	< 0.001^b	65 (40.2)	97 (59.8)	< 0.001^b
Whites	483 (38.4)	774 (61.6)	< 0.001^b	681 (54.2)	576 (45.8)	< 0.001^b	454 (36.2)	801 (63.8)	< 0.001^b
Hospital admission
Yes	129 (74.6)	44 (25.4)	< 0.001^b	50 (28.9)	123 (71.1)	< 0.001^b	112 (65.0)	60 (35.0)	< 0.001^b
No	723 (46.1)	846 (53.9)	< 0.001^b	785 (50.0)	784 (50.0)	< 0.001^b	592 (37.8)	974 (62.2)	< 0.001^b
Location
Sports/rec parks	165 (16.3)	850 (83.7)	< 0.001^b	645 (63.5)	370 (36.5)	< 0.001^b	345 (34.0)	669 (66.0)	< 0.001^b
Other	323 (94.4)	19 (5.6)	< 0.001^b	85 (24.9)	257 (75.1)	< 0.001^b	164 (48.4)	175 (51.6)	< 0.001^b
Boarding
Skateboarding				230 (27.0)	622 (73.0)	< 0.001^b	428 (50.4)	421 (49.6)	< 0.001^b
Snowboarding				605 (68.0)	285 (32.0)	< 0.001^b	276 (31.0)	613 (69.0)	< 0.001^b
Injury
Head	428 (60.8)	276 (39.2)	< 0.001^b	257 (36.5)	447 (63.5)	< 0.001^b
Other	421 (40.7)	613 (59.3)	< 0.001^b	578 (55.9)	456 (44.1)	< 0.001^b
Helmet use
Yes	230 (27.5)	605 (72.5)	< 0.001^b				257 (30.8)	578 (69.2)	< 0.001^b
No	622 (68.6)	285 (31.4)	< 0.001^b				447 (49.5)	456 (50.5)	< 0.001^b

Data are number (percentage) except for p values.

Statistically significant.

rec = recreational.