Table 1.—

Demographic Characteristics of Patients by PTCS Classification

	Definite PTCS (n = 61)	Probable PTCS (n = 10)	Elevated OP without Papilledema (n = 31)	Normal OP (reference) (n = 25)	P-value
Age in years (median, IQR)	13.6(10.5–16.3)	11.5(8.4–13.9)	14.7 (10.6–16.2)	14.2(11.0–15.4)	.37
Female	41 (67.2%)	6 (60%)	19 (61.3%)	16 (64%)	.91
Race					.17
Asian	0	0	1	1
African American	15	0	7	3
Caucasian	39	10	23	20
Not Specified	7	0	0	1
Opening pressure in cm CSF (median, IQR)*	39 (35–49)	24 (21–26)*	35 (31–37)	23 (18–25)*	Overall P < .001; Definite PTCS vs Probable, Elevated OP, & Normal OP, P < .001; Elevated OP vs Normal OP P < .001
BMI Z-score (median, IQR)	1.6(0.8–2.1)	1.6 (0.7–1.8)	1.2(0.8–1.7)	0.5 (−0.1 – 1.2)	Overall P = .017; Definite PTCS vs Normal OP, P = .006; Elevated OP vs Normal OP, P = .004

P-values are from Fisher’s exact test to compare frequencies and Kruskal–Wallis or Mann–Whitney test to compare medians of continuous variables.

^*Three subjects in the Probable PTCS group and 5 in the Normal OP group had opening pressure between 25 and 28 cm but were classified as Normal OP because the subject was either sedated and/or obese.