Table 1.

Baseline characteristics

Characteristic	n	%
Sex
Male	144	74
Female	50	26
Age (yr)
10-20	21	11
20-30	79	41
30-40	63	32
40-50	24	12
50-60	8	4.1
Experience (yr)
< 1	13	6.7
1-2	27	14
3-5	85	44
5-10	51	26
> 10	18	9.2
Lessons
0	29	15
1-3	44	23
3-10	84	43
> 10	37	19
Board type
Twintip	178	92
Directional	11	5.6
Race	1	0.5
Different	4	2.1
Protection
Quick-release	190	98
Impact vest	38	20
Helmet	8	4.1
Different	24	12