. Author manuscript; available in PMC: 2020 Apr 1.

Published in final edited form as: Ocul Surf. 2018 Dec 12;17(2):318–326. doi: 10.1016/j.jtos.2018.12.006

Table 3.

Amount (pmol) of major sphingolipid classes versus meibum quality.

Sphingolipid Species	Good Quality (N=22)		Poor Quality (N=21)		P-Value
Sphingolipid Species	Median	IQR	Median	IQR
SPL	205.75	406.8	187	257.58	0.61
Cer	83.22	215.71	49.7	61.31	0.2
Hex-Cer	24.4	39.85	6.98	8.67	0.03
SM	58.05	211.05	134.73	184.85	0.23
Sph	6.05	4.26	2.22	5.71	0.13
S1P	1.03	1.14	0.15	0.33	0.04

SPL=total sphingolipid, Cer=ceramide, Hex-Cer=hexosyl ceramide, SM=sphingomyelin, Sph=sphingosine, S1P=sphingosine 1-phosphate, IQR=interquartile range