Table 2. Comparison of erythrocyte membrane phosphatidylethanolamine lipid levels at baseline in patients with mood disorder, psychosis, anxity disorder or other psychiatric disorders after 7 years.

	Mood vs no mood (n=26 vs n=43)		Psychosis vs no psychosis (n=20 vs n=49)		Anxiety vs no anxiety (n=19 vs n=50)		Other vs no other (n=11 vs n=58)
	Effect size (Cohen’sd)	P-value	Effect size (Cohen’sd)	P-value	Effect size (Cohen’sd)	P-value	Effect size (Cohen’sd)	P-value
LC ω -6 Fatty Acids
Linolenic acid (18:2n-6)a	−0.553	0.035	0.139	0.543	0.003	0.990	−0.178	0.610
γ-Linolenic acid (18:3n-6)	0.582	0.023	−0.172	0.509	0.260	0.346	0.161	0.603
Dihomo-γ-linolenic acid (20:3n-6)	0.299	0.229	−0.114	0.683	−0.127	0.645	0.264	0.458
Arachidonic acid (20:4n-6)	−0.191	0.447	−0.316	0.213	−0.211	0.410	−0.275	0.371
Docosadienoic acid (22:2n-6)	0.612	0.017	−0.213	0.420	0.015	0.954	−0.188	0.579
Adrenic acid (22:4n-6)	0.243	0.327	−0.242	0.344	−0.148	0.592	−0.014	0.965
LC ω -3 Fatty Acids
a-Linolenic acid (18:3n-3)a	−0.073	0.775	0.106	0.696	−0.307	0.272	0.157	0.650
Eicosapentaenoic acid (20:5n-3)a	−0.729	0.003	−0.134	0.612	−0.467	0.077	−0.233	0.497
Docosapentaenoic acid (22:5n-3)	−0.443	0.076	0.018	0.942	−0.134	0.616	−0.058	0.877
Docosahexaenoic acid (22:6n-3)	−0.618	0.010	−0.092	0.749	−0.486	0.090	−0.625	0.087
Sums and Ratios
Sum of LC ω-6 fatty acidsb	−0.199	0.413	−0.237	0.349	−0.149	0.565	−0.235	0.541
Sum of LC ω-3 fatty acidsb	−0.699	0.004	−0.069	0.911	−0.436	0.111	−0.472	0.197
LC ω -6 to LC ω-3 fatty acids ratio	0.610	0.012	0.008	0.975	0.278	0.335	0.283	0.435

^aLog transformed.

^bSum comprises long-chain fatty acids ⩾20 carbon atoms.