ID

23987

Description

The GAP index and staging system is a multidimensional prognostic staging system using commonly measured clinical and physiologic variables to predict mortality in patients with idiopathic pulmonary fibrosis (IPF). Reference: Ley, B., Ryerson, C. J., Vittinghoff, E., Ryu, J. H., Tomassetti, S., Lee, J. S., ... & King, T. E. (2012). A multidimensional index and staging system for idiopathic pulmonary fibrosis. Annals of internal medicine, 156(10), 684-691.

Keywords

Versions (3)
  1. 7/20/17 7/20/17 -
  2. 1/25/18 1/25/18 -
  3. 9/27/21 9/27/21 -
Copyright Holder

Brett Ley

Uploaded on

July 20, 2017

DOI

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License

Creative Commons BY-NC 3.0
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GAP index and staging system

English

GAP index and staging system

1 forms  
GAP index and staging system
Description

GAP index and staging system

Gender
Description

Gender

Data type

integer

Age
Description

Age

Data type

integer

Lung physiology: FVC (% predicted)
Description

Forced vital capacity

Data type

integer

Measurement units
  • %
Lung physiology: DLCO (% predicted)
Description

Patients should be scored in the “Cannot perform” category for DLCO if their symptoms or lung function prohibited performance of the DLCO maneuver. If DLCO is unavailable because it was not ordered or not completed because of nonrespiratory limitations, then the model cannot be applied.

Data type

integer

Measurement units
  • %
Total points
Description

Stage: I / II / III. Points: 0-3 / 4-5 / 6-8. 1-y Mortality: 5.6 / 16.2 / 39.2 2-y Mortality: 10.9 / 29.9 / 62.1. 3-y Mortality: 16.3 / 42.1 / 76.8.

Data type

integer

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Similar models

GAP index and staging system

1 forms
Name
Type
Description | Question | Decode (Coded Value)
Data type
Alias
Item Group
GAP index and staging system
Item
Gender
integer
Gender
Code List
Gender
CL Item
Female (0)
CL Item
Male (1)
Item
Age
integer
Age
Code List
Age
CL Item
≤60 (0)
CL Item
61-65 (1)
CL Item
>65 (2)
Item
Lung physiology: FVC (% predicted)
integer
Forced vital capacity
Code List
Lung physiology: FVC (% predicted)
CL Item
>75 (0)
CL Item
50-75 (1)
CL Item
<50 (2)
Item
Lung physiology: DLCO (% predicted)
integer
Diffusing capacity of the lung for carbon monoxide
Code List
Lung physiology: DLCO (% predicted)
CL Item
>55 (0)
CL Item
36-55 (1)
CL Item
≤35 (2)
CL Item
Cannot perform (3)
GAP total points
Item
Total points
integer
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