Table 2.

SHFS and SHS participant sphingolipid concentrations (µM)

	SHFS (n = 597)				SHS controls (n = 189)				SHS cases (n = 78)
	Mean	SD	Range	90th/10th pct	Mean	SD	Range	90th/10th pct	Mean	SD	Range	90th/10th pct
Cer-16	0.20	0.07	0.06–0.58	2.2	0.32	0.08	0.13–0.64	1.9	0.33	0.09	0.16–0.6	2.2
Cer-20	0.07	0.03	0.01–0.29	2.8	0.11	0.04	0.04–0.38	2.5	0.11	0.04	0.06–0.27	2.2
Cer-22	0.81	0.33	0.23–3.16	2.5	0.76	0.22	0.34–1.84	1.9	0.74	0.22	0.29–1.43	2.1
Cer-24	5.62	2.06	1.75–18.96	2.4	5.15	1.36	2.33–9.94	1.9	5.06	1.41	2.23–9.93	1.9
SM-16	135.21	28.73	59.79–275.51	1.6	131.37	18.38	84.36–186.86	1.4	134.74	25.97	76.13–226.01	1.6
SM-20	20.33	5.00	8.76–44.53	1.9	15.70	3.17	9.17–23.97	1.8	15.15	3.49	6.65–28.98	1.7
SM-22	35.82	9.40	13.09–76.09	1.9	26.21	5.52	14.03–39.15	1.8	25.23	6.06	12.41–48.77	1.8
SM-24	19.36	5.45	7.35–44.67	2.0	14.06	3.36	7.3–23.76	1.8	13.42	3.42	6.46–24.12	1.9