Called the BOSTN screening tool and it is composed of five separate patient characteristics, each of which is allotted 1 point if present:

Body mass index of 30 kg/m2 or greater;

Observed apnea;

Snoring that is loud;

Tiredness in the daytime; and

Neck circumference of 16.5 inches or greater in females and 17.5 inches or greater in males.

Patients who score 2 points or more are classified as high risk for OSA.