Functional
Outcomes of Sleep Questionnaire (FOSQ)
DEVELOPER NAME
TE Weaver, PhD, FAAN, RN et al
is the developer of this scale which was published in 1997
objective of questionnaire
This is the first self-report measure designed to assess the impact
of disorders of excessive sleepiness (DOES) on multiple activities of everyday
living and the extent to which these
abilities are improved by effective treatment.
NUMBER OF ITEMS, DOMAINS AND CATEGORIES
This scale has 30 items and has five factor subscales i.e.
consisting of 30 questions related to the effects of fatigue on daily
activities. Five domains of day-to-day life that are examined are
·
activity
levels
·
vigilance
·
intimacy
and sexual relationships
·
general
productivity
·
Social
outcomes.
The questionnaire is indicated for both research and clinical
purposes (screening, assessing treatment outcomes, etc.).
SCALING
It is a
likert scale whose scaling of items is from zero to four.
LANGUAGES
This scale was originally developed in English
language which was later translated in many other languages such as Turkish,
Penansulvanian, Spanish, Swedish, French, Mexican, Norwegian version
PSCHOMATRIC ANALYSIS
Three samples were used in the development and psychometric
analyses of the FOSQ:
Sample 1 (n = 153)
consisted of individuals seeking medical attention for a sleep problem and
persons of similar age and gender having no sleep disorder;
samples 2 (n = 24) and 3
(n = 51) were composed of patients from two medical centers diagnosed with
obstructive sleep apnea (OSA).
Factor analysis of the FOSQ yielded five factors: activity
level, vigilance, intimacy and sexual relationships, general productivity, and
social outcome.
Internal reliability was excellent for both the subscales
(alpha = 0.86 to alpha = 0.91) and the total scale (alpha = 0.95).
Test-retest reliability of the FOSQ yielded coefficients
ranging from r = 0.81 to r = 0.90 for the five subscales and r = 0.90 for the
total measure
. The FOSQ successfully discriminated between normal subjects
and those seeking medical attention for a sleep problem
the FOSQ can be used to determine how disorders of excessive
sleepiness affect patients' abilities to conduct normal activities and the
extent to which these abilities are improved by effective treatment of DOES.
LIMITATIONS:
It’s a long
questionnaire, a shorter version; FOSQ 10 came after this which have same
reliability and internal consistency.
SCORING
INSTRUCTIONS OF FOSQ
SUBSCALES QUESTIONS ITEM #
General
productivity 8 questions 1-4, 8-11
Social
outcome 2
questions 12, 13
Activity
level 9
questions 5, 14-16, 22-26
Vigilance 7 questions 6, 7, 17-21
Intimate
relationships and sexual activity 4 questions 27-30
A
response score of 0 for an item should be coed as N/A or missing response.
Thus, potential range of scores for any item is 1-4. Calculate the mean of the answered
items with responses equal to or greater than 1 for each subscale. This is the
weighted mean item total or subscale score.
For
example if a subscale has six questions and one question
has missing response and one with N/A response. Then you would not include
those two questions why you added the responses and you would divide by four
instead of six when calculating the mean. This prevents a score biased due to
missing answers or skipped questions because an individual doesn’t engage in a
particular activity due to reasons other than disorders of excessive
sleepiness.
The
potential range of scores for each subscale is 1-4.
FOR
TOTAL SCORE
To
obtain total score, take all the subscale scores and calculate the mean of
these scores and then multiply that mean by five. Multiply by five regardless
of number of subscales scores used in computation of the mean.
For
example, if you a subscale score for all subscales, then you multiply the mean
of those scores by 5; f you have subscale scores for only 4 of the 5 subscales.
Then you would also multiply the mean by five.
The
potential range of scores for the total score is 5-20
Functional Outcomes of Sleep Questionnaire (FOSQ)
Some people have difficulty
performing everyday activities when they feel tired or sleepy. The
purpose of this questionnaire is to find out if you generally have difficulty
carrying out certain activities because you are too sleepy or tired. In
this questionnaire, when the words "sleepy" or "tired" are
used, it means the feeling that you can't keep your eyes open, your head is
droopy, that you want to "nod off", or that you feel the urge to take
a nap. These words do not refer to the tired or fatigued
feeling you may have after you have exercised.
Directions: Please put a check in the box for
your answer to each question. Select only one answer for each question.
Please try to be as accurate as possible.
|
(0)I don't do this activity for other reasons
|
(4)No difficulty
|
(3)a little difficulty
|
(2)moderate difficulty
|
(1)extreme difficulty
|
1. Do you have difficulty concentrating
on the things you do because you are sleepy or tired?
2. Do you generally have difficulty
remembering things, because you are sleepy or tired
3. Do you have difficulty finishing a
meal because you become sleepy or tired?
4. Do you have difficulty working on a
hobby (for example, sewing, collecting, gardening) because you are sleepy or
tired?
5. Do you have difficulty doing work
around the house (for example, cleaning house, doing laundry, taking out the
trash, repair work) because you are sleepy or tired?
6. Do you have difficulty operating a
motor vehicle for short distances (less
than 100 miles) because you become sleepy or tired?
7. Do you have difficulty operating a
motor vehicle for long distances
(greater than 100 miles) because you become sleepy or tired?
8. Do you have difficulty getting things
done because you are too sleepy or tired to drive or take public
transportation?
9. Do you have difficulty
taking care of financial affairs and doing paperwork (for example, writing
checks, paying bills, keeping financial records, filling out tax forms, etc.) because
you are sleepy or tired?
10. Do you have difficulty performing
employed or volunteer work because you are sleepy or tired?
11. Do you have difficulty maintaining a
telephone conversation, because you become sleepy or tired?
12. Do you have difficulty visiting with
your family or friends in your home because you
become sleepy or tired?
13. Do you have difficulty visiting with
your family or friends in their home because you
become sleepy or tired?
14. Do you have difficulty doing things
for your family or friends because you are too sleepy or tired?
|
(4)No
|
(3)Yes, a
little
|
(2)Yes,
moderately
|
(1)Yes,
extremely
|
15. Has your relationship with family,
friends or work colleagues been affected because you are sleepy or tired?
16.In what way has your relationship
been affected?
|
(0)
I don't do this activity for other reasons
|
(4)
No difficulty
|
(3)
little difficulty
|
(2)
moderate difficulty
|
(1)
extreme difficulty
|
16. Do you have difficulty exercising or
participating in a sporting activity because you are too sleepy or tired?
17. Do you have difficulty watching a
movie or videotape because you become sleepy or tired?
18. Do you have difficulty enjoying the
theater or a lecture because you become sleepy or tired?
19. Do you have difficulty enjoying a
concert because you become sleepy or tired?
20. Do you have difficulty watching TV
because you are sleepy or tired?
21. Do you have
difficulty participating in religious services, meetings or a group or club,
because you are sleepy or tired?
22. Do you have
difficulty being as active as you want to be in the evening because you are sleepy or tired?
23. Do you have
difficulty being as active as you want to be in the morning because you are sleepy or tired?
24. Do you have
difficulty being as active as you want to be in theafternoon because you are sleepy or tired?
25. Do you have
difficulty keeping pace with others your own age because you are sleepy or
tired?
|
(1)Very low
|
(2)Low
|
(3)Medium
|
(4)High
|
26. How would you rate
your general level of activity?
|
(0)I don't do this for other reasons
|
(4)No difficulty
|
(3)a little difficulty
|
(2)moderate difficulty
|
(1)extreme difficulty
|
27. Has your intimate or
sexual relationship been affected because you are sleepy or tired?
|
(0)I don't engage in sexual activity for other
reasons
|
(4)No
|
(3a little
|
(2)moderately
|
(1)Yes, extreme
|
28. Has your desire for intimacy or sex
been affected because you are sleepy or tired?
29. Has your ability to become sexually
aroused been affected because you are sleepy or tired?
30. Has your ability to have an orgasm
been affected because you are sleepy or tired?
FOSQ-10 (2009)
DEVELOPER NAME
objective of questionnaire
It is a shorter version of the original instrument (FOSQ).
The main objective to develop shorter version that it may be more easily
implemented in clinical.
NUMBER OF ITEMS, DOMAINS AND CATEGORIES
Of the 30 original FOSQ items, 10 questions representing each
of the 5 subscales were selected if they had a normal distribution of responses
and the largest pre- to post-treatment effect size
SCALING
FOSQ-10 consists of 10 questions rated on a scale
of 1 to 4 (1=extreme difficulty and 4=no difficulty). A total score and 5
subscale (vigilance, general productivity, social outcome, intimacy, and
activity level) scores are calculated from the responses. Worst subscale score
is 1 (maximum difficulty) and the best score is 4 (no difficulty).
PSCHOMATRIC ANALYSIS
FOSQ 10 has similar validity and reliability as
the FOSQ a with an internal consistency of α = 0.87.
With similar psychometric performances, the FOSQ-10
provides a simple means to assess functional status both in clinical arena and
large scale health assessments with minimizing information loss. Prior to treatment, the Total score of the FOSQ-10 was
robustly associated with the FOSQ-30
although
the short form has fewer questions obtaining less information, the strong
correlation indicates that similar conclusions can be drawn when using the
short form as would be the case if the longer form were employed.
Applying
the criteria suggested by Nunnally and Bernstein, the internal consistency of
the short form surpasses the threshold of 0.70 for application of the measure
in both research and clinical practice.
The range of pre-treatment and post-treatment
scores obtained for the Total score of the short form indicates that, like the
original instrument, it has the ability to detect a wide range of functional
limitations.
The two
versions of the FOSQ were able to reach the same statistical conclusion
regarding differences between normal controls and patients with OSA.
SCORING
INSTRUCTIONS OF FOSQ
Worst subscale score is 1 (maximum difficulty)
and the best score is 4 (no difficulty).
FOSQ-10
Q1.
Do you have difficulty concentrating on the things you do because you are
sleepy or tired?
1.
Yes, extreme 2.
Yes, moderate 3. Yes, a little 4. No
Q2.
Do you generally have difficulty remembering things because you are sleepy or
tired?
1.
Yes, extreme 2.
Yes, moderate 3. Yes, a little 4. No
Q3.
Do you have difficulty operating a motor vehicle for short distances (less than
100 miles) because you become sleepy?
1.
Yes, extreme 2. Yes,
moderate 3. Yes, a little 4. No
Q4.
Do you have difficulty operating a motor vehicle for long distances (greater
than 100 miles) because you become sleepy?
1.
Yes, extreme 2. Yes,
moderate 3. Yes, a little 4. No
Q5.
Do you have difficulty visiting your family or friends in their home because
you become sleepy or tired?
1.
Yes, extreme 2. Yes,
moderate 3. Yes, a little 4. No
Q6.
Has your relationship with family, friends or work colleagues been affected
because you are sleepy or tired?
1.
Yes, extreme 2.
Yes, moderate 3. Yes, a little 4. No
Q7.
Do you have difficulty watching a movie or video because you become sleepy or
tired?
1.
Yes, extreme 2.
Yes, moderate 3. Yes, a little 4. No
Q8.
Do you have difficulty being as active as you want to be in the evening because
you are sleepy or tired?
1.
Yes, extreme 2.
Yes, moderate 3. Yes, a little 4. No
Q9.
Do you have difficulty being as active as you want to be in the morning because
you are sleepy or tired?
1.
Yes, extreme 2.
Yes, moderate 3. Yes, a little 4. No
Q10.
Has your mood been affected because you are sleepy or tired?
1.
Yes, extreme 2. Yes,
moderate 3. Yes, a little 4. No
