Table 2:

Prevalence of imaging signs and concordance with low P_CSF^a

	Overall Prevalence		Concordant Sign and PCSF		Discordant Sign and PCSF
					Sign Absent, PCSF ≤6		Sign Present, PCSF >6
	%	No./Total	%	No./Total	%	No./Total	%	No./Total
Dural enhancement	83	77/93	39	36/93	5	5/93	56	52/93
Brain sagging	61	60/99	55	54/99	9	9/99	36	36/99
Venous distension sign	75	75/99	42	42/99	8	8/99	49	49/99
Leak on myelogram	55	54/99	55	54/99	12	12/99	33	33/99

^aConcordance is defined as the presence of the imaging sign when P_CSF is low (≤6 cm H₂O) or absence of the sign when P_CSF is not low.