TABLE 2.

Longitudinal association between nut consumption and risk of cognitive impairment.

Nut consumption	Total	Cases	Model 1a		Model 2b		Model 3c
			RR (95% CI)	p-value	RR (95% CI)	p-value	RR (95% CI)	p-value
None or not weekly	7297	2783	1.00 (Ref)	–	1.00 (Ref)	–	1.00 (Ref)	–
<70 g/week	367	106	0.77 (0.65–0.91)	<0.01	0.85 (0.71–1.01)	0.06	0.86 (0.72–1.03)	0.10
≥70 g/week	1364	377	0.73 (0.66–0.80)	<0.01	0.81 (0.73–0.89)	<0.01	0.83 (0.75–0.91)	<0.01
P for trend			<0.01		<0.01		<0.01

RR, relative risk; CI, confidence interval; g/week, grams per week.

^aNo variable was adjusted in model 1.

^bAdjusted for age, gender, race, education level marital status, family income.

^cAdjusted for same covariates in model 2, plus body mass index, hypertension, diabetes, coronary heart disease, smoking, alcohol drinking, exercise, tea drinking, vegetables intake, fruits intake, red meat intake, fish intake, eggs intake, Patient Health Questionnaire-9 scale scores.

The bold values mean “P < 0.05”.