Table 2.

The distribution of bleeding symptoms in two cohorts of patients^a with AHA.

Type of bleeding	Collins et al. 2007 [5] (%)	Morrison et al. 1993 [14] (%)
	N = 172	N = 65
Subcutaneous/skin	81	23
Muscle	45	32
Subcutaneous only	24
Gastrointestinal/intrabdominal	23	14
Genital urinary	9	18
Retroperitoneal/thoracic	9	5
Other	9	23
Post-operative		11
Joint	7	2
None	4
Intracranial hemorrhage	3
Fatal	9
No haemostatic treatment required	34

^aIn the study by Collins et al. [5] all bleeds at presentation were recorded. In the study by Morrison et al. [14] bleeds requiring treatment were recorded. The studies are therefore not directly comparable.