Table 4.

Association between red blood cell proportions of C22:6n-3 (DHA) and C18:3n-3 (ALA) in tertiles and ANT scores on impulsivity index

Fatty acida	Impulsivity index, ms
	Minimally adjustedb				Fully adjustedc
	N	Coef	(95% CI)	P value	N	Coef	(95% CI)	P value
C22:6n-3
1st tertile (3.12)	88	Ref			61	Ref
2nd tertile (3.89)	82	24.12	( – 25.45; 73.69)	0.339	65	17.82	( – 45.35; 80.98)	0.578
3rd tertile (4.75)	82	18.02	( – 31.86; 67.90)	0.477	72	27.11	( – 35.86; 90.07)	0.397
Tertiles in continuousd	252	9.15	( – 15.76; 34.06)	0.470	198	13.42	( – 17.93; 44.78)	0.399
C18:3n-3
1st tertile (0.06)	84	Ref			70	Ref
2nd tertile (0.09)	85	4.67	( – 46.65; 55.99)	0.858	73	14.12	( – 48.27; 76.51)	0.656
3rd tertile (0.14)	83	– 48.90	( – 104.43; 6.63)	0.084	59	– 66.22	( – 131.80;  – 0.65)	0.048
Tertiles in continuousd	252	– 24.86	( – 52.67; 2.94)	0.079	198	– 34.19	( – 67.16;  – 1.22)	0.042

ms milliseconds, CI confidence interval, Ref reference group, Coef. β coefficients estimated by linear regression models, N number of subjects with available data

Higher scores indicate worse attention performance (higher impulsivity)

^aMedian of each fatty acid within tertile category

^bAdjusted for: school center, age, and gender of the child

^cAdditionally adjusted for: body mass index of the child, alcohol consumption (have you ever consumed alcoholic beverages? yes/no), smoking habit (have you ever smoked a normal or electronic cigarette? yes/no), physical activity ≥ 3 times/week (yes/no), modified Mediterranean diet score (1–7 “low”/8–12 “high”), maternal educational level (university studies/lower education), paternal education level (university studies/lower education), maternal occupational social class (manual/non-manual) and paternal occupational social class (manual/non-manual)

^dThe p value is P for trend