Patient selection: functional bowel disorder
Parameters:
(1) amount of abdominal pain on a VAS scale from 0 to 100 mm (10 cm, extremely severe)
(2) meets criteria for chronic functional abdominal pain
(3) number of visits to physician for symptoms in past 6 months
|
Parameter
|
Finding
|
Points
|
|
amount of abdominal pain felt today
|
|
0 (none) to 100 (extreme)
|
|
chronic functional abdominal pain
|
absent
|
0
|
|
|
present
|
106
|
|
number of visits to a doctor for bowel symptoms during past 6 months
|
|
(number of visits) * 11
|
Severity of abdominal pain is marked on a 10 cm visual analogue scale with the left end indicating "no pain" and the right indicating "very severe" pain
Criteria for chronic functional abdominal pain - all of the following:
(1) recurrent or continuous abdominal pain for at least 6 months
(2) incomplete or no relationship of the pain with physiologic events (eating, defecation, or menses)
(3) some loss of daily functioning
(4) no evidence of organic disease to explain the pain
FBDSI =
= SUM(points for 3 parameters)
Interpretation:
• minimum score: 0
• maximum score: > 300 (dependent on number of physician visits)
• The higher the score the more severe the bowel disorder.
|
Index
|
Severity
|
|
<= 36
|
mild
|
|
37 – 110
|
moderate
|
|
>= 111
|
severe
|
where:
• The original interpretation uses <= 36 as mild severity. A score < 5 probably should be classed as minimal or negative.
• In a review in 2016 the cutoffs were < 36, 36 to 109 and > 110.
Performance:
• The index correlates with the physician's rating of severity.
• The index met several measures for validity (simple logic, convergent validity, association with disability).
• The index was tested at multiple institutions and showed transportability.
