Centre for Epidemic Interventions Research, Norwegian Institute of Public Health, 0213 Oslo, Norway.
Health Services Division, Norwegian Institute of Public Health, 0213 Oslo, Norway.
Int J Environ Res Public Health. 2021 Aug 26;18(17):8971. doi: 10.3390/ijerph18178971.
Face masks are recommended as a means of reducing the spread of COVID-19, but there are practically no studies of interventions to increase face mask use. Over three weeks, nine grocery stores in the Stovner District of Oslo were randomly selected each day to have distribution of free face masks outside their entrance. Free face mask distribution increased the proportion of customers wearing a mask by 6.0 percentage points (adjusted, 95% CI 3.5-8.5). Mean mask usage was 91.7% in the control group and 97.1% in the treatment group (pooled SD 5.3%). Practically all those who wore masks had both nose and mouth covered. We conclude that free distribution of face masks increased their use. Similar trials can be conducted within a short period of time.
口罩被推荐作为减少 COVID-19 传播的一种手段，但实际上几乎没有关于增加口罩使用的干预措施的研究。在三周的时间里，奥斯陆斯托弗内尔区的 9 家杂货店每天都被随机选中，在入口处分发免费口罩。免费分发口罩使戴口罩的顾客比例增加了 6.0 个百分点（调整后，95%CI 为 3.5-8.5）。对照组的平均口罩使用率为 91.7%，治疗组为 97.1%（合并 SD 为 5.3%）。几乎所有戴口罩的人都同时遮住了鼻子和嘴。我们得出结论，免费分发口罩增加了口罩的使用。可以在短时间内进行类似的试验。
