Patient population evaluated:
(1) chronic bronchitis
(2) asthma
(3) emphysema
The instrument consists of 6 questions.
Responses ranged from 1 (never) to 4 or 5 (severe).
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Activity
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Examples
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vigorous activity
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running, walking up a steep hill, climbing more than 3 flights of stairs, carrying a moderate load on level ground
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moderate activity
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walking up a gradual hill, climbing less than 3 flights of stairs, carrying a light load on level ground
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light activity
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walking on level ground, shopping, washing or standing
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no activity
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at rest, sitting down, lying down
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chronic lung disease severity index =
= (points for shortness of breath frequency) + (points for causes of shortness of breath) + (points for wheezing frequency) + (points for causes of wheezing) + (points for cough frequency) + (points for sputum-phlegm production)
shortness of breath subscale =
= (points for shortness of breath frequency) + (points for causes of shortness of breath)
wheezing subscale =
= (points for wheezing frequency) + (points for causes of wheezing)
cough subscale =
= (points for cough frequency) + (points for sputum-phlegm production)
conversion of score to 0-100 scale =
= ((patient score) - (minimum score)) / ((maximum score) - (minimum score)) * 100
Interpretation:
• minimum index score: 6, maximum 27
• minimum subscale score: 2, maximum 9
• The higher the score, the worse the symptomatology.
