Table 1:

Plasma concentrations of ceramides and sphingomyelins carrying different saturated fatty acids and correlations between the species

			Cer-16	Cer-20	Cer-22	Cer-24	SM-16	SM-20	SM-22
	Mean ± SD, μg/mL	Range	------------------------Spearman Correlations------------------------
Cer-16	0.27 ± 0.06	0.09 to 0.91	1
Cer-20	0.08 ± 0.03	0.01 to 0.25	0.52	1
Cer-22	0.62 ± 0.19	0.18 to 1.90	0.60	0.60	1
Cer-24	4.62 ± 1.32	1.31 to 11.28	0.62	0.60	0.82	1
SM-16	125.20±19.28	48.93 to 227.05	0.45	0.32	0.22	0.32	1
SM-20	17.71 ± 3.57	6.19 to 36.35	0.29	0.36	0.46	0.43	0.48	1
SM-22	26.61 ± 5.88	9.60 to 63.23	0.33	0.30	0.57	0.43	0.56	0.79	1
SM-24	14.27 ± 3.53	4.59 to 33.19	0.28	0.10	0.40	0.37	0.52	0.67	0.90

Abbreviations: Cer-16, Cer-20, Cer-22, Cer-24 = ceramide with palmitic, arachidic, behenic, lignoceric acid respectively. SM-16, SM-20, SM-22, SM-24 = sphingomyelin with palmitic, arachidic, behenic, lignoceric acid respectively.