RT Journal Article
SR Electronic
T1 Temporal and seasonal variation in the occurrence of chemical incidents
JF Occupational and Environmental Medicine
JO Occup Environ Med
FD BMJ Publishing Group Ltd
SP 177
OP 179
DO 10.1136/oem.2002.002899
VO 61
IS 2
A1 B Olowokure
A1 P J Saunders
A1 J A Dyer
A1 A J Kibble
YR 2004
UL http://oem.bmj.com/content/61/2/177.abstract
AB Aims: To determine whether there were temporal or seasonal patterns in the occurrence of chemical incidents reported to the West Midlands Chemical Incident Surveillance System, UK. Methods: A retrospective analysis of reports maintained on a computerised database was carried out for information received from January 1997 to December 2001. Results: Annual numbers of events increased significantly from 77 (7.5%) in 1997 to 282 (27.4%) in 2001. Compared to the average of other seasons, proportionately more incidents occurred in the summer (29.3%). Compared with the average of other days, incidents were more likely to occur on Thursdays (17.1%) and least likely on Saturdays (8.9%). When grouped together on a six hourly basis incidents were most frequent between 12 00 and 17 59 (31.1%) and least frequent between 00 00 and 05 59 (21.2%). Conclusions: The surveillance system shows that chemical incidents do not occur randomly but have marked temporal and seasonal variation. These results have implications for service provision, training, and the development of preventive strategies.