Send to:

Choose Destination
See comment in PubMed Commons below
J Occup Environ Med. 2007 Mar;49(3):310-7.

Evolution of lower respiratory symptoms in New York police officers after 9/11: a prospective longitudinal study.

Author information

  • 1Department of Medicine, Penn State University College of Medicine, Hershey, PA 17033, USA.



We studied the evolution of lower respiratory symptoms at 1 month (initial) and 19 months (follow-up) after the collapse of the World Trade Center on September 11, 2001 (9/11).


A total of 1588 New York police officers completed initial self-administered questionnaires. The level of 9/11 exposure and pre-9/11 health was available in 1373. Of those, 471 (426 with no pre-9/11 chronic respiratory disease) completed a follow-up telephone survey.


Prevalence of cough was 43.5% at both initial and follow-up assessments, but increased were the prevalence of phlegm (14.4% to 30.7%, P<0.001), shortness of breath (18.9% to 43.6%, P<0.001), and wheeze (13.1% to 25.9%, P<0.001). Rates of delayed-onset (present on follow-up assessment only) cough, phlegm, shortness of breath, and wheeze were 21%, 21.9%, 31.7%, and 17.3%, respectively.


Most of the lower respiratory symptoms increased between 1 month and 19 months after 9/11.

[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Lippincott Williams & Wilkins
    Loading ...
    Write to the Help Desk