Tentori Katya, Pighin Stefania, Giovanazzi Giulia, Grignolio Andrea, Timberlake Benjamin, Ferro Antonio
Center for Mind/Brain Sciences (CIMeC), University of Trento, Rovereto, Italy.
Centre for Medical Sciences (CISMed), University of Trento, Trento, Italy.
Med Decis Making. 2022 Aug;42(6):837-841. doi: 10.1177/0272989X221101536. Epub 2022 Jun 6.
Although vaccination against SARS-CoV-2 is considered the central strategy against the pandemic, uptake lags behind target rates.
To explore whether this rate could be enhanced by a nudging strategy that exploits the status quo bias, we conducted a randomized controlled trial in northern Italy comparing vaccination acceptance among 2000 adults, ages 50 to 59 years, who were either invited to set an appointment (opt-in group) or assigned an individual appointment (opt-out group).
Results indicate a difference of 3.2 percentage points, which represents a 32% relative increase in the vaccination rate for the opt-out group compared with the opt-in group.
A significant portion of those who remain unvaccinated may not hold strong beliefs against vaccination but rather tend to inaction and may therefore be nudged toward vaccination with a reduction of action required.
Reluctant adults (50-59 years), who had not yet received vaccines against COVID-19, were sent letters announcing appointment availabilityIn an RCT, the status quo option in the notices influenced the rate of vaccine acceptanceNudging via pre-scheduled appointments encouraged vaccine uptake more than invitations to schedule didSwitching the default option yielded a 32% relative increase (13.1% vs. 9.9%) in vaccination.
尽管针对严重急性呼吸综合征冠状病毒2（SARS-CoV-2）的疫苗接种被视为应对疫情的核心策略，但接种率仍落后于目标水平。
为探究利用现状偏差的助推策略是否能提高这一接种率，我们在意大利北部开展了一项随机对照试验，比较了2000名年龄在50至59岁之间的成年人的疫苗接种接受情况，这些成年人要么被邀请自行预约（选择加入组），要么被安排个人预约（选择退出组）。
结果显示两组相差3.2个百分点，这表明选择退出组的疫苗接种率相比选择加入组有32%的相对增幅。
很大一部分未接种疫苗的人可能并非强烈反对接种，而是倾向于不作为，因此可以通过减少所需行动来推动他们接种疫苗。
尚未接种2019冠状病毒病疫苗的50至59岁的不情愿成年人收到了告知可预约的信件。在一项随机对照试验中，通知中的现状选项影响了疫苗接受率。通过预先安排预约进行助推比邀请预约更能促进疫苗接种。改变默认选项使疫苗接种率相对提高了32%（13.1%对9.9%）。
