Pulmonary Complications of HIV Infection Study (PACS)

This study has been completed.
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)
ClinicalTrials.gov Identifier:
First received: May 25, 2000
Last updated: June 23, 2005
Last verified: March 2005

To evaluate the types, incidence, course, and outcome of pulmonary disorders in newly diagnosed cases of Acquired Immune Deficiency Syndrome (AIDS), newly diagnosed cases of AIDS-related complex (ARC) and newly diagnosed asymptomatic human immunodeficiency virus (HIV) infection.

Acquired Immunodeficiency Syndrome
HIV Infections
Lung Diseases
Pneumocystis Carinii Infections
AIDS-related Complex

Study Type: Observational

Resource links provided by NLM:

Further study details as provided by National Heart, Lung, and Blood Institute (NHLBI):

Study Start Date: September 1987
Estimated Study Completion Date: May 1997
Detailed Description:


Pulmonary infections as a group are the most commonly recognized life threatening disorders in patients with the AIDS. Although Pneumocystis carinii was the predominant pulmonary pathogen found in these patients, other organisms were clearly of importance as well, not with early years of the HIV epidemic only in patients with AIDS and ARC but in individuals with asymptomatic HIV infection.

In the mid-1980s, physicians who examined many AIDS patients had the impression that a shift was occurring in the types and incidence of pulmonary complications associated with HIV infection. For example, there appeared to be an increased incidence of serious infections caused by pyogenic bacteria and pulmonary and extrapulmonary infection with M. tuberculosis had been noted with increased frequency. Furthermore, lymphoid interstitial pneumonitis (LIP), which is diagnostic of AIDS in children under 13 years old who are HIV antibody positive, was diagnosed with increased frequency in adults. Nonspecific interstitial pneumonitis also appeared to be on the rise. Legionella pneumonia, in contrast to its increased incidence during 1981-83, was now seldom encountered. However, apart from the increased incidence of tuberculosis, a reportable disease, these other shifts in the incidence of pulmonary complications had not been verified.

Because diagnostic strategies in the development of new treatment regimens and new approaches for clinical research were dependent upon knowledge of the incidence and natural history of pulmonary complications associated with HIV infection, the collection of such information was important.

The Request for Proposals for this initiative was released in January 1987. Awards were made in September 1987. The study was funded jointly by the NHLBI and the NIAID. The study was extended by the cooperative agreement mechanism in FY 1993.


The cohort consisted of 3 groups: Group A HIV seropositive, no symptoms attributable to HIV and CD4+ Cells >= 400 per microliter; Group B HIV seropositive chemical manifestations of HIV in past 6 months or CD4+ Cells < 400 per microliter; and Group C HIV seronegative controls. The pulmonary status of individuals in each of the categories was evaluated by such methods as chest radiography, pulmonary function tests, nuclear medicine studies, and histological and/or microbiological evaluation. The prospective cohort study described the incidence and course of lung diseases at all stages of HIV infection. Six clinical centers from different geographic areas in the United States began enrolling participants in 1988, and the resulting cohort comprised 1,369 members. HIV seropositive participants were randomized to "intensive" (pulmonary disease screening and follow-up at three-month intervals) or "routine" (six-month follow-up intervals with annual screening) follow-up to assess the impact of these strategies on patient outcomes. The contract-supported phase of the study was jointly funded by the NHLBI and the NIAID.

In 1992, the NHLBI decided to extend follow-up for another five years. The contractors applied for research grants which were approved by the National Heart, Lung, and Blood Advisory Council in May 1992 and awarded in October, 1992. In the renewal, particular attention was given to identifying patterns of complications among demographic subgroups that had not been extensively studied, such as women and Blacks, and to defining differences between HIV transmission groups. The study ended in May, 1997.


Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   No

No eligibility criteria

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00005273

Sponsors and Collaborators
Investigator: Jeffrey Glassroth Medical College of Pennsylvania
Investigator: Jeffrey Glassroth Northwestern University
Investigator: Philip Hopewell University of California
Investigator: Paul Kvale Henry Ford Hospital
Investigator: W. Poole RTI International
Investigator: Lee Reichman New Jersey U of Medicine and Dentistry
Investigator: Lee Reichman University of Medicine and Dentistry of New Jersey
Investigator: Mark Rosen Beth Israel Medical Center
Investigator: Mark Rosen Mount Sinai School of Medicine
Investigator: Jeanne Wallace University of California
  More Information


ClinicalTrials.gov Identifier: NCT00005273     History of Changes
Other Study ID Numbers: 1300
Study First Received: May 25, 2000
Last Updated: June 23, 2005
Health Authority: United States: Federal Government

Additional relevant MeSH terms:
AIDS-Related Complex
Acquired Immunodeficiency Syndrome
HIV Infections
Immunologic Deficiency Syndromes
Pneumocystis Infections
Immune System Diseases
Lentivirus Infections
RNA Virus Infections
Retroviridae Infections
Sexually Transmitted Diseases
Sexually Transmitted Diseases, Viral
Slow Virus Diseases
Virus Diseases

ClinicalTrials.gov processed this record on March 31, 2015