McNeill A D, West R, Jarvis M J, Russell M A
J Behav Med. 1986 Dec;9(6):559-65. doi: 10.1007/BF00845285.
Expired-air carbon monoxide (CO) concentrations were measured in 125 pupils aged 11-17 years attending a girls' comprehensive school in the South of England who had smoked at least one cigarette on the day of testing. Both number of cigarettes smoked on the day of testing and time since the last cigarette were independently related to CO concentrations. Although there was a positive correlation between age and CO, this disappeared when number of cigarettes smoked on the day of testing and time since the last cigarette were taken into account. Previous reports of increasing CO concentrations with age taking account of cigarette consumption may be due to the use of usual daily cigarette consumption rather than number on the day of testing, which is more relevant given the short half-life of CO in the blood. In this sample, no evidence was found for an increase in smoke inhalation with increasing age.
对英国南部一所女子综合学校的125名11至17岁的学生进行了呼出气体一氧化碳（CO）浓度测量，这些学生在测试当天至少吸了一支烟。测试当天吸烟的数量和距最后一支烟的时间都与CO浓度独立相关。尽管年龄与CO之间存在正相关，但在考虑测试当天吸烟数量和距最后一支烟的时间后，这种相关性消失了。先前关于在考虑香烟消费情况下CO浓度随年龄增加的报道，可能是由于使用了通常的每日香烟消费量而非测试当天的吸烟数量，鉴于血液中CO的半衰期较短，测试当天的吸烟数量更具相关性。在这个样本中，没有发现随着年龄增长吸入烟雾增加的证据。
