NEW YORK - Researchers tracking Sept. 11 responders who became ill after working at the World Trade Center site found many had lung problems years later in a study the authors said proves persistent illness in people exposed to toxic dust caused by the twin towers’ collapse.
The study by the Mount Sinai Medical Center’s medical monitoring program examined more than 3,000 responders between 2004 and 2007, repeating exams conducted between the middle of 2002 and 2004.
Slightly more than 24 percent of the patients had abnormal lung function, the study found. In the earlier examinations, about 28 percent of the patients had similar results.
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