Programmable valve (PV) has been shown as a solution to the high revision rate in pediatric hydrocephalus patients, but it remains controversial among adults. This study is to compare the overall revision rate, revision cause, and revision-free survival between PV and non-programmable valve (NPV) in adult patients with different hydrocephalus etiologies.
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Initial Shunt revision rate
Timeframe: since the time of index operation until the initial revision or 2022/07/31
Total Shunt revision rate
Timeframe: since the time of index operation until the initial revision or 2022/07/31
The cause of shunt revision
Timeframe: since the time of index operation until the initial revision or 2022/07/31
Type of the revision operation
Timeframe: since the time of index operation until the initial revision or 2022/07/31
Revision-free survival
Timeframe: since the time of index operation until the initial revision or 2022/07/31