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Table 2: Summary of patients^{^a}
Pre-LP Post-LP P Value
Pressure (cm H₂O) 21.7 ± 5.2 8.9 ± 2.0 <.001
PT intensity 4.4 ± 3.2 1.7 ± 2.5 .020
Ipsilateral flow rate (mL/min) 393 ± 100 406 ± 92 .296
Ipsilateral peak velocity (m/s) 0.98 ± 0.37 0.73 ± 0.25 .003
CSF withdrawn (mL) 14.9 ± 6.4 
Severity of stenosis 77.9 ± 28.0 
↵a Data are means unless otherwise indicated.

	Pre-LP	Post-LP	P Value
Pressure (cm H₂O)	21.7 ± 5.2	8.9 ± 2.0	<.001
PT intensity	4.4 ± 3.2	1.7 ± 2.5	.020
Ipsilateral flow rate (mL/min)	393 ± 100	406 ± 92	.296
Ipsilateral peak velocity (m/s)	0.98 ± 0.37	0.73 ± 0.25	.003
CSF withdrawn (mL)	14.9 ± 6.4
Severity of stenosis	77.9 ± 28.0