TABLE 5.

Associations of vitamin B1 and vitamin B12 with dementia defined by MMSE ≤ 23 in each sex.

		Total n	Dementia n (%)	Crude		Adjusted*
				OR (95% Cl)	p	OR (95% Cl)	p
Men
Age (years)
	T1 (83–98)	24	14 (58.3)	1.56 (0.46–5.23)	0.475	0.24 (0.19–3.01)	0.268
	T2 (75–83)	22	13 (59.1)	1.60 (0.47–5.54)	0.454	0.72 (0.15–3.50)	0.684
	T3 (51–75)	19	9 (47.4)	1.00		1.00
Vitamin B1 (ng/mL)
	T1 (24.4–42.2)	21	14 (66.7)	1.38 (0.40–4.80)	0.608	1.37 (0.39–4.87)	0.623
	T2 (42.2–53.0)	22	9 (40.9)	0.50 (0.14–1.59)	0.230	0.53 (0.15–1.85)	0.318
	T3 (53.0–412.8)	22	13 (59.1)	1.00		1.00
Vitamin B12 (pg/mL)
	T1 (105–412.8)	21	12 (57.1)	0.92 (0.27–3.10)	0.897	0.92 (0.26–3.23)	0.894
	T2 (412.8–588.0)	22	11 (50.0)	0.69 (0.21–2.28)	0.545	0.64 (0.19–2.16)	0.468
	T3 (588.0–1455.0)	22	13 (59.1)	1.00		1.00
Women
Age (years)
	T1 (83–93)	46	27 (58.7)	2.95 (1.22–7.15)	0.017	1.32 (0.21–8.33)	0.767
	T2 (77–83)	41	19 (46.3)	1.79 (0.73–4.42)	0.205	1.24 (0.33–4.69)	0.747
	T3 (50–77)	40	13 (32.5)	1.00		1.00
Vitamin B1 (ng/mL)
	T1 (4.6–39.7)	42	28 (66.7)	3.73 (1.52–9.16)	0.004	2.59 (1.00–6.70)	0.049
	T2 (39.7–47.5)	42	16 (38.1)	1.15 (0.47–2.78)	0.759	0.81 (0.31–2.08)	0.655
	T3 (47.5–282.0)	43	15 (34.9)	1.00		1.00
Vitamin B12 (pg/mL)
	T1 (105.0–401.2)	42	24 (57.1)	2.97 (1.22–7.28)	0.017	2.28 (0.89–5.85)	0.088
	T2 (401.2–591.4)	43	22 (51.2)	2.34 (0.96–5.67)	0.061	2.31 (0.91–5.89)	0.079
	T3 (591.4–3733.0)	42	13 (31.0)	1.00		1.00

MMSE, Mini-Mental State Examination; T1, tertile 1; T2, tertile 2; T3, tertile 3. *Age, vitamin B1, and vitamin B12 were included as explanatory variables in a logistic regression model.