Prevalence
Causes
Clinical
features
Investigations
Therapy
Prognosis
|  | | | Clinical
features |
Look for:
- conjunctival pallor a
- facial pallor
b
- palmar pallor
b
-
The more that are present, the greater the chance of
anaemia
.
b
Why?
Conjunctival pallor, facial or palmar pallor make
anaemia
more likely.
| Patient |
Target Disorder and
Reference Standard |
Diagnostic Test |
LR+
(95% CI)
|
Post-test Probability |
LR-
(95% CI)
|
Post-test Probability |
suspected
anaemia
b
(pre-test probability: 19%)
|
anaemia
(haemocrit
<0.41 men or <0.31 women)
|
conjunctival pallor
|
3.1
(1.4 to
6.8)
|
42% |
0.65
(0.50 to
0.84)
|
13% |
|
|
|
facial pallor
|
3.6
(1.3 to
9.8)
|
46% |
0.72
(0.59 to
0.89)
|
14% |
|
|
|
palmar pallor
|
2.2
(1.2 to
4.0)
|
34% |
0.62
(0.46 to
0.85)
|
13% |
|
|
|
any present
|
2.3
(1.4 to
3.8)
|
35% |
0.48
(0.32 to
0.72)
|
10% |
|
|
|
2 present
|
3.0
(1.4 to
6.6)
|
41% |
0.67
(0.52 to
0.86)
|
14% |
|
|
|
all present
|
5.5
(1.3 to
23)
|
56% |
0.77
(0.66 to
0.91)
|
15% |
|
internal medicine