Prevalence
Clinical
features
Differential
Diagnosis
Investigations
Therapy
Prevention
Prognosis
|  | | | Clinical
features |
First attack of colitis
Ask about diarrhoea
- its duration c
- number of bowel movements per day at onset
c
Why?
Prolonged diarrhoea make
inflammatory bowel disease more likely
| Patient |
Target Disorder and
Reference Standard |
Diagnostic Test |
LR+
(95% CI)
|
Post-test Probability |
LR-
(95% CI)
|
Post-test Probability |
|
diagnosed with gastroenteritis c
(pre-test probability:
11%)
|
inflammatory bowel disease
(endoscopy, histology)
|
diarrhoea for > 14 days
|
8.6
(4.1 to 18)
|
52% |
0.62
(0.45 to 0.85)
|
7% |
Few bowel movements a day at onset make
inflammatory bowel disease more likely
| Patient |
Target Disorder and
Reference Standard |
Diagnostic Test |
LR+
(95% CI)
|
Post-test Probability |
|
colitis undergoing sigmoidoscopy c
(pre-test probability: 50%)
|
inflammatory bowel disease
(stool culture, histology, follow-up)
|
bowel movements < 4 per day at onset
|
15
(2.2 to
110)
|
94% |
|
|
|
4-6 per day at onset
|
3.9
(1.3 to
12)
|
79% |
|
|
|
7-9 per day at onset
|
0.37
(0.095 to
1.4)
|
27% |
|
|
|
10-12 per day at onset
|
0.26
(0.10 to
0.66)
|
20% |
|
|
|
>12 per day hr at onset
|
0.0
(0.0 to
0.15)
|
0% |
|
internal medicine