Understanding your sleep study results

Your diagnostic sleep study report

Your doctor ordered an overnight sleep study (also called a polysomnogram or PSG) either in a sleep center or your home, to determine if you have sleep apnea. After you complete the sleep study, your doctor will give you the results and discuss what to do next.

You may be given a copy of your sleep study report. If so, the report may be filled with terms you haven't seen before. Below is an example of what is typically included in a diagnostic sleep study report along with descriptions of what is being reported.

Diagnostic sleep study report

Name: Doe, John

Height: 73"

Test Date: 8/9/2012

DOB: 1/21/1973

Weight: 205 lbs

Age: 39 YRS

BMI: 27

Referring physician: Dr. Acula

Sex: Male

Test: #136

Mr. Doe is a 39 year-old male referred by Dr. Smith with symptoms of snoring and excessive daytime sleepiness. His bed partner reports that Mr. Doe has apnea episodes and wakes up gasping for breath several times during the night. The patient is 73 inches tall and 205 pounds with a BMI of 27.0. He is significant for a Mallampati class 3 oropharnyx.

The medical history is significant for hypertension. His current medications are Lisinopril and Prilosec. The patient's normal bedtime is 10:30 pm. A full in-lab Diagnostic Polysomnography was ordered to rule out the diagnosis of obstructive sleep apnea (OSA).

? Apnea/hypopnea index
18.8
? Total respiratory events
104
? Central apneas
12
? Central hypopneas
? Mixed apneas
1
? Obstructive apneas
91
? Obstructive hypopneas
0
? RERA count / RERA index
0 / 0.0/hr
? RDI
0.0
? Supine AHI
31.5
? Lateral AHI
35.4
 
? Prone AHI
0.0
? Oxygen saturations
Mean SpO2
96%
Lowest SpO2 during sleep
84%
? Limb movements
Leg movements
562 / 81.2
PLMS
453 / 65.4
PLMS Arousals
55 / 7.9
Sleep times
Lights out
10:07:44 PM
Lights on
5:25:02 AM
Total bed time (min)
437.3
Total sleep time (min)
357.0
 
? Sleep efficiency
81.6%
? Sleep latency (min)
11.6
? REM latency (min)
33.1
? WASO (min)
27.2
?

Respiratory events recorded in each category:

0
Snore:
11
Spontaneous:
10
Total:
21
Arousal Index
18.0
?
16
25
12
53
12.2
?
21
58
28
107
15.5
?
6
15
3
24
3.5
?
27
73
31
131
18.9
?
3.9
10.5
4.5
18.9
--

The report above is an example of a diagnostic sleep report, where you are tested to determine if you have a sleep disorder.

Other reports include:

  • a CPAP titration study report, which is the result of a separate study to fit you with a CPAP device and mask after you have been diagnosed with sleep apnea
  • a split-night sleep study report, in which a CPAP titration study on the same night as an in-lab sleep study. This is known as a split-night sleep study. The CPAP titration occurs in the second half of the night.