Table 5. Causes of headaches secondary to systemic disorders among non-hospitalized and hospitalized patients.

	Non-hospitalized	Hospitalized
Sinusitis	8 (4.8)	5 (7.8)
Systemic infection	6 (3.6)	5 (7.8)
Drug abuse	4 (2.4)	0 (0)
Arterial hypertension	2 (1.2)	0 (0)
SHDP	0 (0)	2 (3.1)
Postural hypotension	2 (1.2)	0 (0)
Hypoglycemia	1 (0.6)	0 (0)
Total	23 (17.6)	12 (18.8)

SHDP = Specific hypertensive disease of pregnancy; % given in parenthesis.