The instrument consists of 20 statements.
Scoring of responses is based on 5-point Likert scale responses:
|
Responses
|
Points
|
|
not at all
|
0
|
|
mildly
|
1
|
|
moderately
|
2
|
|
severely
|
3
|
|
very severely
|
4
|
Scoring: based on 5-point Likert scale responses
total score =
= (MEAN(total points for all 20 questions)) * 2.5
breathlessness and restricted subscore =
= (MEAN(points for questions 1+2+3+4+5+15+16)) * 2.5
social disruption subscore =
= (MEAN(points for questions 11+12+13+14+17)) * 2.5
mood disturbance subscore =
= (MEAN(points for questions 6+7+8+9+10) * 2.5
health concerns subscore =
= (MEAN(points for questions 11+17+18+19+20) * 2.5
Interpretation:
• The scores and subscores range from 0 to 10, with 10 indicating severe compromise.
• The questionnaire is able to detect improvement in patients with asthma can separate between improved and stable patients.
• The social disruption subscale most strongly correlated with change in the markers of asthma severity.
Conversion of score to symptom descriptor (not in references):
|
Score
|
Symptoms
|
|
0
|
none
|
|
< 1.0
|
minimal
|
|
1.0 to 3.5
|
mild
|
|
3.6 to 6.0
|
moderate
|
|
6.1 to 9.0
|
severe
|
|
> 9.-
|
very severe
|
Limitations:
• The questionnaire may not be valid for children and adolescents with asthma.
