Table 3.

Trend Test of Association of Daily Dietary ETA Intakes with Psoriasis

	Model 1 OR (95% CI)	Model 2 OR (95% CI)	Model 3 OR (95% CI)
Quintiles of ETA
Q1 (0–0.07 g/d)	Reference	Reference	Reference
Q2 (0.07–0.11 g/d)	0.89 (0.66, 1.20)	0.90 (0.67, 1.21)	0.88 (0.65, 1.19)
Q3 (0.11–0.16 g/d)	0.85 (0.63, 1.15)	0.86 (0.63, 1.15)	0.83 (0.61, 1.12)
Q4 (0.16–0.23 g/d)	0.82 (0.61, 1.11)	0.82 (0.60, 1.11)	0.79 (0.58, 1.07)
Q5 (0.23–1.49 g/d)	0.71 (0.52, 0.97)	0.71 (0.51, 0.98)	0.68 (0.49, 0.94)
P for trend	0.032	0.037	0.016

Notes: Model 1: no covariates were adjusted. Model 2: gender, age, veteran, marital status, PIR were adjusted. Model 3: gender, age, veteran, marital status, PIR, BMI, drinking alcohol, smoking were adjusted.

Abbreviations: ETA, eicosatetraenoic acid (20:4 n-3).