Table 2: Elements Common to Proposed Definitions for MCS since 1985.

Element

Ontario
(1985)

Cullen
(1987)

Ashford
& Miller
(1991)

AAEM
(1992)

NRC
(1992)

AOEC
(1992)

Nethercott
et al.
(1993)

IPCS
(1996)

Multiple environmental causes

X

X

X

X

 

X

X

X

Time (chronicity)

X

X

 

X

X

X

X

 
Multiorgan symptoms

X

X

 

X

X

X

 

X

Symptoms at very low levels

X

X

   

X

X

X

X

Symptoms affected by presence/
absence of exposure

X

 

X

 

X

 

X

 
Exclusion of  other etiologies  

X

   

X

X

 

X

Symptoms acquired  

X

     

X

 

X

Demonstrable  exposure  

X

           

Return to Table of Contents

Return to Committee Reports Page