Table 3. Spearman's rank correlations between sphingomyelin molecular species and various parameters.

	SM C14:0		SM C16:0		SM C18:0		SM C20:0		SM C22:0		SM C24:0
	r	P-value	r	P-value	r	P-value	r	P-value	r	P-value	r	P-value
BMI (kg m−2)	−0.013	0.952	0.177	0.419	0.493	0.017	0.410	0.052	0.417	0.048	0.406	0.055
BFM (kg)	0.204	0.351	0.092	0.677	0.573	0.004	0.423	0.045	0.485	0.019	0.449	0.032
PBF (%)	0.297	0.169	0.166	0.449	0.661	0.001	0.451	0.031	0.521	0.011	0.525	0.010
IRI (μU ml−1)	0.145	0.510	0.178	0.415	0.497	0.016	0.457	0.028	0.451	0.031	0.514	0.012
HOMA-R	0.171	0.435	0.221	0.310	0.525	0.010	0.461	0.027	0.482	0.020	0.552	0.006
AST (U l−1)	−0.126	0.567	0.222	0.309	0.377	0.076	0.427	0.042	0.453	0.030	0.589	0.003
ALT (U l−1)	−0.145	0.508	0.280	0.196	0.389	0.067	0.447	0.033	0.489	0.018	0.625	0.001
γGTP (IU l−1)	−0.089	0.688	0.309	0.152	0.382	0.072	0.491	0.017	0.528	0.010	0.613	0.002
ChE (U l−1)	0.049	0.825	0.154	0.484	0.497	0.016	0.452	0.030	0.435	0.038	0.575	0.004
T-chol (mg dl−1)	0.126	0.566	0.243	0.264	0.551	0.006	0.642	0.001	0.618	0.002	0.678	0.0004
HDL-C (mg dl−1)	−0.005	0.982	−0.191	0.383	−0.369	0.083	−0.320	0.137	−0.321	0.136	−0.357	0.094
LDL-C (mg dl−1)	−0.015	0.945	0.300	0.164	0.477	0.021	0.553	0.006	0.498	0.016	0.613	0.002
TG (mg dl−1)	0.371	0.082	−0.024	0.913	0.564	0.005	0.581	0.004	0.559	0.006	0.476	0.022
Atherogenic index	0.275	0.205	0.048	0.826	0.523	0.010	0.517	0.012	0.501	0.015	0.459	0.027

	SM C16:1		SM C18:1		SM C20:1		SM C22:1		SM C24:1		Total
	r	P-value	r	P-value	r	P-value	r	P-value	r	P-value	r	P-value
BMI (kg m−2)	0.091	0.678	0.066	0.764	−0.047	0.832	0.058	0.793	0.114	0.604	0.260	0.230
BFM (kg)	0.244	0.263	0.241	0.268	0.126	0.568	0.150	0.494	0.135	0.539	0.338	0.115
PBF (%)	0.305	0.157	0.343	0.109	0.226	0.299	0.245	0.260	0.220	0.313	0.427	0.042
IRI (μU ml−1)	0.284	0.189	0.219	0.315	0.128	0.562	0.136	0.535	0.210	0.337	0.360	0.092
HOMA-R	0.274	0.206	0.178	0.417	0.073	0.740	0.130	0.553	0.226	0.299	0.363	0.089
AST (U l−1)	−0.083	0.706	−0.100	0.651	−0.145	0.510	−0.032	0.886	0.133	0.546	0.147	0.503
ALT (U l−1)	−0.021	0.923	−0.091	0.680	−0.169	0.442	0.036	0.870	0.205	0.347	0.229	0.293
γGTP (IU l−1)	−0.091	0.680	−0.203	0.352	−0.265	0.222	−0.010	0.962	0.184	0.401	0.222	0.309
ChE (U l−1)	0.147	0.504	0.085	0.701	−0.009	0.968	0.045	0.839	0.142	0.519	0.260	0.231
T-chol (mg dl−1)	−0.007	0.973	0.013	0.952	0.026	0.906	0.068	0.757	0.109	0.620	0.265	0.222
HDL-C (mg dl−1)	−0.222	0.308	−0.163	0.458	−0.032	0.884	−0.101	0.647	−0.152	0.488	−0.243	0.264
LDL-C (mg dl−1)	−0.002	0.993	−0.033	0.881	−0.116	0.599	0.026	0.906	0.122	0.579	0.245	0.261
TG (mg dl−1)	0.311	0.149	0.330	0.124	0.263	0.225	0.153	0.485	0.086	0.698	0.317	0.141
Atherogenic index	0.293	0.174	0.287	0.185	0.185	0.399	0.149	0.497	0.111	0.615	0.311	0.148

Abbreviations: ALT, alanine aminotransferase; AST, aspartate aminotransferase; BFM, body fat mass; BMI, body mass index; ChE, cholinesterase; HDL-C, high-density lipoprotein cholesterol; HOMA-R, homeostasis model assessment of insulin resistance; IRI, immunoreactive insulin; LDL-C, low-density lipoprotein cholesterol; PBF, percentage body fat; T-chol, total cholesterol; TG, triglyceride; γGTP, γ-glutamytranspeptidase.

Bold indicates that the correlation is statistically significant. Atherogenic index was calculated by the logarithm to the base 10 of the ratio of serum triglyceride to HDL-C in mmoll⁻¹.