Table 1. Occupational exposure of Birmingham International Airport (Birmingham, UK) workers and respiratory disorders.

Exposure group	Workers	Subjects n	Comments	Median time spent in aircraft taxiing area h·day−1	Crude prevalence of respiratory problems
					Runny nose	Cough with phlegm	Shortness of breath	Wheezing
High	Baggage handlers Airport hands Marshallers Operational engineers Fitters Engineering technicians	53	Considerable proportion of their working day in close proximity to in-service aircraft	8	58	36	25	13
Medium	Security staff Fire fighters Airfield operations managers	83	Some of their working time on the airport apron, some in reasonable proximity to aircraft and some within the terminal buildings	1	42	16	22	17
Low	Terminal and office workers	86		0	45	36	24	20

Data are presented as %, unless otherwise stated. Data from [20].