Table 8.

The bivariate proportional OR model performed to assess the association between the thyroid nodule presence/absence and the responses of each item included in PREDIMED questionnaire.

Questions of PREDIMED questionnaire	OR	*p-value	95% CI	R2	χ2
Use of extra virgin olive oil as main culinary lipid	0.42	<0.001	0.29–0.59	0.031	25.08
Extra virgin olive oil >4 tablespoons	0.70	0.013	0.53–0.93	0.008	6.19
Vegetables ≥2 servings/day	0.32	<0.001	0.24–0.42	0.077	63.46
Fruits ≥3 servings/day	0.14	<0.001	0.10–0.19	0.193	169.92
Red/processed meats <1/day	0.16	<0.001	0.11–0.22	0.173	150.83
Butter, cream, margarine <1/day	1.51	0.004	0.14–2.00	0.010	8.38
Soda drinks <1/day	0.91	0.513	0.69–1.20	0.001	0.43
Wine glasses ≥7/week	0.48	<0.001	0.35–0.65	0.029	23.13
Legumes ≥3/week	0.46	<0.001	0.34–0.61	0.037	29.67
Fish/seafood ≥3/week	0.06	<0.001	0.04–0.08	0.334	322.25
Commercial sweets and confectionery ≤ 2/week	0.56	<0.001	0.42–0.75	0.020	15.83
Tree nuts ≥3/week	0.49	<0.001	0.36–0.67	0.026	20.54
Poultry more than red meats	0.67	0.008	0.50–0.90	0.009	7.04
Use of sofrito sauce ≥2/week	0.76	0.054	0.58–1.00	0.005	3.72

PREDIMED, Prevención con Dieta Mediterránea; OR, odds ratio; CI, confidence interval. *A significant difference (p < 0.05).