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Table 1 Demographic features of patients.

From: Cerebrospinal fluid markers before and after shunting in patients with secondary and idiopathic normal pressure hydrocephalus

 

Secondary NPH (n = 17) Mean (SD), frequency

Idiopathic NPH (n = 18) Mean (SD), frequency

Age (years)

65 (10); range 49–79

68 (15.7); range 19–86

Males/Females

12/5

11/7

Duration of symptoms (months)

16 (19); range 2–60

40 (37); range 11–164

Etiology

  

   Subarachnoid hemorrhage

9 (53%)

 

   Cerebrovascular disorder

4 (23%)

 

   Trauma

2 (12%)

 

   Other*

2 (12%)

 

Cerebrovascular risk factors

  

   Hypertension

4 (23%)

5 (28%)

   Cardiovascular disorder

3 (18%)

5 (28%)

   Diabetes

1 (6%)

2 (11%)

  1. Cerebrovascular disorder etiology was considered when there was a temporal relationship between an ischemic or hemorrhagic incident other than subarachnoid hemorrhage and development of NPH symptoms. * Meningioma (n = 1) and Recklinghausen's disease (n = 1). These are the same patients as reported in a previous paper [18].