背景：共享单车用户的头盔使用率很低。我们试图描述头盔的使用模式，头盔使用的障碍，以及多伦多共享单车用户的自行车安全措施。
方法：对公共自行车共享计划（PBSP）用户在PBSP站点的半随机分布进行了标准化调查。通过保持每个调查期间一个头盔佩戴者（HW）：两个非头盔佩戴者（NHW）的比例，我们控制了位置，day,时间,和天气。
结果：调查于545年完成（180HW，365NHW）在48/80PBSP位置的唯一用户，从2012年11月到2013年8月。更多的女性戴头盔（F：41.1％，M:30.9%,p=0.0423)。NHW的年龄略小于HW（NHW平均年龄34.4岁vsHW37.3，p=0.0018）。这些群体的就业状况没有差异，教育,或收入。NHW的头盔拥有率较低(NHW：62.4%，HW：99.4%，p<0.0001),个人自行车所有权也是如此(NHW：65.8%，vs硬件：78.3%，p=0.0026）。NHW不太可能总是在个人自行车上戴头盔（NHW：22.2%，HW：66.7%，p<0.0001),并且不太可能在PBSP上始终或大部分时间戴头盔（NHW：5.8％vsHW：92.3％，p<0.0001)。两组,但更多的HWs,计划在离开房屋时使用PBSP（HW：97.2％vsNHW：85.2％，p<0.0001),主要是为了上班(HW：88.3%，NHW：84.1%，p=0.19）。NHW更有可能报告说他们会更多地戴头盔(NHW：61.4%vsHW：13.9%，p<0.0001),和/或周期较少（NHW：22.5％vsHW：4.4％），如果必须使用头盔。
结论：接受调查的PBSP用户似乎在头盔使用方面做出了深思熟虑的决定。NHW倾向于男性，稍微年轻一点,并且不太可能在他们的私人自行车上使用头盔。由于在PBSP上不戴头盔的多伦多骑自行车的人通常不会在个人自行车上戴头盔，增加头盔使用的干预措施应同时针对个人和共享自行车用户。立法使用头盔和提供租赁头盔可以改善共享自行车用户的头盔使用情况，但我们的研究结果表明，通过立法减少自行车运动的风险。
BACKGROUND: Helmet use among bike-share users is low. We sought to characterize helmet-use patterns, barriers to helmet use, and cycling safety practices among bike-share users in Toronto.
METHODS: A standardized survey of public bike-share program (PBSP) users at semi-random distribution of PBSP stations was undertaken. By maintaining a ratio of one helmet-wearer (HW): two non-helmet-wearers (NHW) per survey period, we controlled for location, day, time, and weather.
RESULTS: Surveys were completed on 545 (180 HW, 365 NHW) unique users at 48/80 PBSP locations, from November 2012 to August 2013. More females wore helmets (F: 41.1%, M: 30.9%, p=0.0423). NHWs were slightly younger than HWs (NHW mean age 34.4 years vs HW 37.3, p=0.0018). The groups did not differ by employment status, education, or income. Helmet ownership was lower among NHWs (NHW: 62.4% vs HW: 99.4%, p<0.0001), as was personal bike ownership (NHW: 65.8%, vs HW: 78.3%, p=0.0026). NHWs were less likely to always wear a helmet on personal bikes (NHW: 22.2% vs HW: 66.7%, p<0.0001), and less likely to wear a helmet always or most of the time on PBSP (NHW: 5.8% vs HW: 92.3%, p<0.0001). Both groups, but more HWs, had planned to use PBSP when leaving their houses (HW: 97.2% vs NHW: 85.2%, p<0.0001), primarily to get to work (HW: 88.3% vs NHW: 84.1%, p=0.19). NHWs were more likely to report that they would wear a helmet more (NHW: 61.4% vs HW: 13.9%, p<0.0001), and/or cycle less (NHW: 22.5% vs HW: 4.4%) if helmet use was mandatory.
CONCLUSIONS: PBSP users surveyed appear to make deliberate decisions regarding helmet use. NHWs tended to be male, slightly younger, and less likely to use helmets on their personal bikes. As Toronto cyclists who do not wear helmets on PBSP generally do not wear helmets on their personal bikes, interventions to increase helmet use should target both personal and bike-share users. Legislating helmet use and provision of rental helmets could improve helmet use among bike-share users, but our results suggest some risk of reduced cycling with legislation.
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