Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started
My Medicine

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

COPD Health Center

Font Size

Emphysema: Stages and Prognosis

Doctors describe the severity and progression of emphysema with staging systems. Although everyone with emphysema is unique, emphysema staging can help with prognosis. However, no emphysema staging system can accurately predict what will happen to any individual person with emphysema.

Pulmonary Function Affects Emphysema Prognosis

Emphysema staging requires pulmonary function testing (PFTs). Doctors use PFTs to follow the lung capacity in people with emphysema. During PFTs, a person with emphysema breathes and blows air through a tube while airflow is measured. A person's emphysema prognosis is in large part determined by PFTs.

The lung damage in emphysema creates small air pockets in the lungs, where air becomes trapped. The trapped air makes it difficult for people with emphysema to blow out forcefully. The more air that is trapped, the worse lung function becomes. Over time, this makes it harder to breathe with emphysema, and pulmonary function test results decline.

The GOLD Emphysema Staging System

One major emphysema staging system is called GOLD. It was created by an expert group called the Global Initiative for Chronic Obstructive Lung Disease.

The major factor in GOLD emphysema staging is the amount of air a person with emphysema can forcefully exhale in one second. This is called the forced expiratory volume, or FEV1.

GOLD emphysema staging is as follows:

Stage I, Mild emphysema: FEV1 greater than or equal to 80% of normal

Stage II, Moderate emphysema: FEV1 less than 80%, but greater than or equal to 50% of normal

Stage III, Severe emphysema: FEV1 less than 50%, but greater than or equal to 30% of normal

Stage IV, Very severe emphysema: FEV1 less than 30% of normal, OR less than 50% of normal with low blood oxygen levels

GOLD emphysema staging is well established and widely used. However, GOLD emphysema staging does not include other areas of functioning that are important, such as how people living with emphysema feel.

The BODE Emphysema Staging System

Emphysema affects more than the ability to blow air through a tube. The BODE index, another emphysema staging system, measures emphysema's impact on multiple areas in life:

  • Body mass index (B), or weight adjusted for height
  • Airflow limitation (O for obstruction), measured by pulmonary function tests.
  • Breathlessness (D for dyspnea), assessed by a questionnaire.
  • Exercise capacity (E), measured by how far a person with emphysema can walk in six minutes.

The BODE index does a slightly better job at determining emphysema prognosis than GOLD criteria.

Today on WebMD

man talking to his doctor
Check your COPD risk.
woman using inhaler
What is the top cause of this condition?
chest x-ray
7 early warning signs.
Senior couple stretching
10 exercises for people With COPD.
Bronchitis Overview
Senior woman blowing dandelion
Living With Copd
human lung graphic
Energy Boosting Foods
red heart and ekg
Living With Copd
Senior couple stretching