Kozlowski L T
Am J Public Health. 1986 Nov;76(11):1337-8. doi: 10.2105/ajph.76.11.1337.
The relation between packs containing 25 or 20 cigarettes each and self-reports of daily cigarette intake was examined in surveys of smoking habits from the United States and Canada. More Canadian than US smokers report smoking 25 cigarettes per day (19.3 per cent vs 2.1 per cent). As market share of packs of 25 increases across six regions in North America, reports of smoking 25 cigarettes per day increase. Even if smoke exposure remains constant, smoking statistics are likely to be influenced by pack size.
在美国和加拿大的吸烟习惯调查中，研究了每包分别装有25支或20支香烟的包装与每日吸烟量自我报告之间的关系。报告每天吸25支烟的加拿大吸烟者多于美国吸烟者（19.3%对2.1%）。随着北美六个地区每包25支香烟的市场份额增加，每天吸25支烟的报告也增加。即使接触的烟雾量保持不变，吸烟统计数据也可能受到包装规格的影响。
