By R.E. Hester, R.M. Harrison
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Additional resources for AIR POLLUTION & HEALTH
Mohsenin, Arch. Environ. Health, 1988, 43, 242. M. W. Frampton, P. E. Morrow, C. , Am. Rev. Respir. , 1991, 143, 522. W. S. Linn, J. C. Solomon, S. C. , Arch Environ. Health, 1985, 40, 234. G. von Nieding, M. Wagner, H. , Int. Arch. , 1971, 27, 338. Asthmatic Subjects. The findings in asthmatic subjects are not too dissimilar from those found in normal subjects. However, there are a few studies— where some change in bronchial responsiveness did occur with exposures between around 250 and 500 ppb for durations ranging between 30 minutes and three hours.
J. G. Ayres, Eur. Respir. , 1998, 8, in press. 13 job:LAY01 21-9-1998 page:14 colour:1 black–text J. G. Ayres present evidence. However, the longer-term effects of nitrogen dioxide exposure, particularly when one bears in mind that oxides of nitrogen are major products of gas combustion in kitchens and levels are also elevated in rooms with a poorly serviced gas fire, may be more important in determining chronic health effects. There have been many studies going back a number of years showing that respiratory symptoms in population studies were more noticeable in homes with gas fired kitchens.
This method of analysis has been followed by many subsequent researchers who have also, with variable success, attempted to deal with confounders and co-exposures in panel studies. Most of these studies have, however, been undertaken in children, either specific groups of subjects with asthma or school summer camp studies where a variable number have asthma. A significant problem comes when recruiting subjects for such studies and having to define whether a child with respiratory symptoms should be regarded as having asthma or another diagnosis, such as episodic bronchitis.
AIR POLLUTION & HEALTH by R.E. Hester, R.M. Harrison