Results—The German Q18 was easy to handle and quick to perform. Workers exposed to solvents reported significantly
more complaints than controls (2.9 v 2.5).
All patients with a psycho-organic syndrome had five or more complaints. This was true for only 32% of patients with lung
disease. These comparisons showed that chronic exposure to solvents was associated with subjective complaints related
particularly to cognitive functions. In the sample of the general population, age, education level, smoking habits, and time
of performance showed no significant influence on the Q18 result. Women had significantly more complaints than men
(3.2 v 2.3). People who reported drinking alcohol occasionally or moderately had significantly fewer complaints than teetotalers.