medical decision support medical decision support
Sign In

Primary Open Angle Glaucoma (POAG) Risk Model

Purpose: To evaluate the risk of developing primary open angle glaucoma (POAG) in a patient with ocular hypertension using the OHTS and EGPS model.

Description

Members of the Ocular Hypertension Treatment Study Group (OHTS) and the European Glaucoma Prevention Study Group developed a model for predicting the risk of a patient with ocular hypertension developing primary open angle glaucoma (POAG). The authors are from multiple institutions in North America and Europe.


Patient selection: presence of ocular hypertension

 

Parameters:

(1) age in years

(2) mean intraocular pressure (IOP) in mm Hg

(3) mean central corneal thickness (CCT) in microns (µm)

(4) mean vertical cup to disc ratio by contour

(5) mean pattern standard deviation (PSD) in decibels (dB)

 

Parameter

Finding

Points

age in years

< 45 years

0

 

45 to 54.99 years

1

 

55 to 64.99 years

2

 

65 to 74.99 years

3

 

>= 75 years

4

mean IOP in mm Hg

< 22 mm Hg

0

 

22 to 23.99 mm Hg

1

 

24 to 25.99 mm Hg

2

 

26 to 27.99 mm Hg

3

 

>= 28 mm Hg

4

mean CCT in microns

> 600 microns

0

 

576 to 600 microns

1

 

551 to 575 microns

2

 

526 to 550 microns

3

 

<= 525 microns

4

mean vertical cup to disc ratio

< 0.30

0

 

0.30 to 0.39

1

 

0.40 to 0.49

2

 

0.50 to 0.59

3

 

>= 0.60

4

mean PSD in dB

< 1.80

0

 

1.80 to 1.99

1

 

2.00 to 2.39

2

 

2.40 to 2.79

3

 

>= 2.80

4

 

total score =

= SUM(points for all 5 parameters)

 

Interpretation:

• minimum score: 0

• maximum score: 20

• The higher the score the greater the risk of developing primary open angle glaucoma in 5 years.

 

Total Score

5 Year Risk of POAG

0 to 6

< 4%

7 or 8

10%

9 or 10

15%

11 or 12

20%

>= 13

>= 33%

 


To read more or access our algorithms and calculators, please log in or register.

Specialty

Objective

ICD-10