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Updated on: 29 Oct 2023, 03:16
Originally posted by Sajjad1994 on 14 Mar 2021, 22:00.
Last edited by BottomJee on 29 Oct 2023, 03:16, edited 2 times in total.
Last edited by BottomJee on 29 Oct 2023, 03:16, edited 2 times in total.
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The multiple sleep latency test (MSLT) is the most widely used objective assessment procedure for excessive daytime sleepiness. It consists of a series of five nap opportunities given every two hours in a sleep laboratory. The patient lies in a darkened, sound-attenuated room for up to 20 minutes and is instructed to fall asleep. The average latency to sleep onset over all nap opportunities provides an index of sleep propensity.
As a general guideline, only mean sleep latencies shorter than 8 minutes on an MSLT are considered abnormal, and latencies shorter than 5 minutes are taken to indicate severe excessive daytime sleepiness. A patient with a mean sleep latency of 2 minutes or less on an MSLT is unlikely to be exaggerating a complaint of excessive daytime sleepiness, to suffer from fatigue rather than sleepiness, or to be free of any sleep disorder.
As a general guideline, only mean sleep latencies shorter than 8 minutes on an MSLT are considered abnormal, and latencies shorter than 5 minutes are taken to indicate severe excessive daytime sleepiness. A patient with a mean sleep latency of 2 minutes or less on an MSLT is unlikely to be exaggerating a complaint of excessive daytime sleepiness, to suffer from fatigue rather than sleepiness, or to be free of any sleep disorder.
Ramesh may suffer from some type of sleep disorder.
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
60% (03:14) correct
40%
(03:15)
wrong
based on 1891
sessions
History
Date
Time
Result
Not Attempted Yet
1. Which of the following can be reasonably inferred from the data provided?
| John’s MSLT results fall within normal guidelines. | |
| Angel has exaggerated her claim of daytime sleepiness. | |
| Ramesh may suffer from some type of sleep disorder. | |
| John does not suffer from a sleep disorder. | |
| Sara suffers from fatigue, not excessive daytime sleepiness. |
ShowHide Answer
Official Answer
Ramesh may suffer from some type of sleep disorder.
There was a major noise disturbance in the sleep center on 6/17/17.: No
None of the patients who had a sleep test after 6/17 suffered from anxiety during the test.: No
All of the patients less than 50 years of age had atypical sleep the night before the test.: Yes
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
23% (01:44) correct
77%
(01:45)
wrong
based on 2109
sessions
History
Date
Time
Result
Not Attempted Yet
2. Based on the information presented, some of the patients have MSLT data that could be misleading and others do not. For the following statements, select Yes if the scenario provided would change that status for any of the five patients. Otherwise select No.
| Yes | No | |
| There was a major noise disturbance in the sleep center on 6/17/17. | ||
| None of the patients who had a sleep test after 6/17 suffered from anxiety during the test. | ||
| All of the patients less than 50 years of age had atypical sleep the night before the test. |
ShowHide Answer
Official Answer
There was a major noise disturbance in the sleep center on 6/17/17.: No
None of the patients who had a sleep test after 6/17 suffered from anxiety during the test.: No
All of the patients less than 50 years of age had atypical sleep the night before the test.: Yes
60% of the participants had a mean sleep latency of less than 8 minutes.: True
Only one of the five patients had results that indicate severe excessive daytime sleepiness.: False
It is possible that Sara suffers from fatigue rather than excessive daytime sleepiness.: True
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
22% (01:47) correct
78%
(01:44)
wrong
based on 2102
sessions
History
Date
Time
Result
Not Attempted Yet
3. For the following statements, select True if the statement is inferable from the data provided. Otherwise select False.
| True | False | |
| 60% of the participants had a mean sleep latency of less than 8 minutes. | ||
| Only one of the five patients had results that indicate severe excessive daytime sleepiness. | ||
| It is possible that Sara suffers from fatigue rather than excessive daytime sleepiness. |
ShowHide Answer
Official Answer
60% of the participants had a mean sleep latency of less than 8 minutes.: True
Only one of the five patients had results that indicate severe excessive daytime sleepiness.: False
It is possible that Sara suffers from fatigue rather than excessive daytime sleepiness.: True
Attachment:
1.jpg [ 60.26 KiB | Viewed 14345 times ]
25 Jul 2022, 00:47
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Solutions:
Question 1
Results for Sara, Angel, and John can be misleading (taking medication, underage)
So, any conclusions for them will not be reliable. Only option C is correct because Ramesh's data is reliable and he is clearly near the 2-minute average mark at which disorders are very likely.
Question 2
1. [no] There was a major noise disturbance in the sleep center on 6/17/17.
- Sara was tested on that date and she already had misleading data. So, her status of whether she has misleading data does not change (she had misleading data before, and now after the noise she still has misleading data, even if the actual data changes further)
2. [no] None of the patients who had a sleep test after 6/17 suffered from anxiety during the test.
- Steve anyway does not suffer from anxiety. For Angel and John, data was not reliable before either due to other reasons. So, status does not change.
3. [yes] All of the patients less than 50 years of age had atypical sleep the night before the test.
- This will change Ramesh and Steve's data from "not misleading" to "misleading".
Question 3
1. misleading data - can't say
2. Ramesh has non-misleading data - and avg ~ 2mins -- yes
3. misleading data - can't say
Question 1
Results for Sara, Angel, and John can be misleading (taking medication, underage)
So, any conclusions for them will not be reliable. Only option C is correct because Ramesh's data is reliable and he is clearly near the 2-minute average mark at which disorders are very likely.
Question 2
1. [no] There was a major noise disturbance in the sleep center on 6/17/17.
- Sara was tested on that date and she already had misleading data. So, her status of whether she has misleading data does not change (she had misleading data before, and now after the noise she still has misleading data, even if the actual data changes further)
2. [no] None of the patients who had a sleep test after 6/17 suffered from anxiety during the test.
- Steve anyway does not suffer from anxiety. For Angel and John, data was not reliable before either due to other reasons. So, status does not change.
3. [yes] All of the patients less than 50 years of age had atypical sleep the night before the test.
- This will change Ramesh and Steve's data from "not misleading" to "misleading".
Question 3
1. misleading data - can't say
2. Ramesh has non-misleading data - and avg ~ 2mins -- yes
3. misleading data - can't say
23 Mar 2025, 14:11
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Rohit_842
Sorry, I did not find 6 anywhere.
You can solve this question a few ways:
- Quick and dirty (and probably good enough)
- Detailed and long (and you can still make a mistake)
I would recommend Quick and Dirty.
I did not do the other 2 questions so it is possible that some of this calculations would have been already done but if you approach this question as a PS, You will be doing a lot of calculations to calculate mean/average for 5 people with 5 parameters. That's annoying esp with minute and second conversions, so I did quick and dirty. However to do the quick and dirty, you have to have read and understood all of the 3 conditions/questions.
- Ramesh
- Nap times: 1:45, 3:10, 1:24, 2:05, 1:30
- Approx Average 2 or so minis (actual is 1.98 if you care)
- Conclusion: below 5 minutes
- Sara
- Nap times 5:34, 4:34, 5:45, 3:45, 5:05
- Approx Average: hard to determine. This sucks because we have to figure out the exact number to rule below or above 5 mins), so 334 + 274 + 345 + 225 + 305 = 296.6 mins, just under 5 mins.
- Conclusion: below 5 minutes but very close.
- Angel
- Nap times: 10:32, 8:34, 7:45, 9:22, 11:23
- Approx Average is likely 10 mins and definitely way above 8.
- Conclusion: above 8 minutes
- John (Kid - may be affected by the note)
- Nap times: 8:34, 9:23, 5:56, 9:34, 10:23
- Approx Average over 8 mins in my view without doing a recalculation.
- Conclusion: this is above 8 minutes
- Steve
- Nap times: 6:23, 7:45, 8:34, 7:56, 8:10
- Approx Average: has to be below 8 mins because we have 40 secs from 8:34, 7:56, and 8:10 to distribute to 6:23 and 7:45, so below 8.
- Conclusion: between 8 and 5 minutes
- 60 % of the participants had a mean sleep latency of less than 8 minutes.
Three of the five (Ramesh, Sara, Steve) have means under 8 minutes, which is 60 %. TRUE - Only one of the five patients had results that indicate severe excessive daytime sleepiness.
Actually 2 patients (Ramesh and Sara) average under 5 minutes, which qualifies as severe, not one. FALSE. - It is possible that Sara suffers from fatigue rather than excessive daytime sleepiness. - Trickiest Question.
The guidelines say someone who falls asleep in under 2 minutes is unlikely to be merely fatigued or exaggerating. Sara’s mean is greater than 2 minutes, so we are not told that we can rule out fatigue. We are also told that using a stimulant may lead to misleading results. TRUE.
