TABLE 3.

Association between fried and unfried potato consumption and mortality

		Basic-adjusted model1		Fully adjusted model2
	Incidence (number of deaths/1000 person-years) (95% CI)	HR (95% CI)	P	HR (95% CI)	P
Unfried potatoes
≤1 time/mo	9 (2, 17)	1 (reference)		1 (reference)
2–3 times/mo	12 (6, 17)	1.15 (0.75, 1.75)	0.53	1.24 (0.81, 1.91)	0.33
1 time/wk	13 (5, 20)	1.16 (0.74, 1.82)	0.53	1.18 (0.73, 1.90)	0.50
2 times/wk	21 (10, 33)	1.44 (0.94, 2.20)	0.09	1.50 (0.94, 2.39)	0.09
≥3 times/wk	12 (4, 19)	0.82 (0.49, 1.37)	0.44	0.89 (0.51, 1.55)	0.67
Fried potatoes
≤1 time/mo	10 (6, 14)	1 (reference)		1 (reference)
2–3 times/mo	12 (7, 18)	1.38 (0.98, 1.90)	0.07	1.37 (0.99, 1.91)	0.06
1 time/wk	9 (5, 13)	1.12 (0.73, 1.72)	0.61	1.10 (0.70, 1.71)	0.68
2 times/wk	18 (6, 31)	1.90 (1.10, 3.27)	0.02	1.95 (1.11, 3.41)	0.02
≥3 times/wk	32 (7, 57)	2.56 (1.35, 4.83)	0.004	2.26 (1.15, 4.47)	0.02

¹The basic-adjusted model included as covariates age (continuous) and sex.

²The fully adjusted model included as covariates age (continuous), sex, race/ethnicity (white vs. other), BMI (continuous), education (degree vs. others), smoking habits (current and previous vs. others), yearly income (categorized as ≥$50,000, <$50,000, or missing data), Physical Activity Scale for Elderly score (continuous), Charlson comorbidity index (continuous), daily energy intake (continuous), alcohol consumption (weekly), adherence to a Mediterranean diet, and Center for Epidemiologic Studies–Depression scale (continuous). In the analyses of unfried potatoes, the consumption of fried potatoes was added as a covariate in the fully adjusted model and vice versa.