. Author manuscript; available in PMC: 2015 Nov 1.

Published in final edited form as: J Am Geriatr Soc. 2014 Oct 3;62(11):2125–2129. doi: 10.1111/jgs.13082

Table 2.

Odds ratios (95% confidence interval) of CI by quartiles of plasma vitamin D₃ (25(OH) D) levels of cognitively intact subjects

	Quartiles of plasma vitamin D₃ (25(OH)D), nmol/L

	1 (high)	2	3	4 (low)	P for linear trend	1 SD decrement of plasma vitamin D₃
Plasma vitamin D₃
Median, nmol/L	66.8	49.3	37.1	24.1
Range, nmol/L	57.0–208.7	43.0–57.0	31.6–43.0	5.7–31.6
Cognitively impaired	27	39	75	224
Cognitively intact	409	410	410	410
Unadjusted OR	1.00	1.44(0.87–2.40)	2.78(1.75–4.40)^‡	8.32(5.45–12.7)^‡	<0.001	2.79(2.36–3.30)^‡
Adjusted^a OR	1.00	1.21(0.55–2.66)	1.22(0.57–2.62)	2.15(1.05–4.41)^*	0.05	1.32(1.00–1.74)^*

Adjusted for age, gender, education, BMI, systolic and diastolic blood pressure, eGFR, plasma glucose, plasma triglyceride, total cholesterol, current smoking, current drinking, outdoor activities, ADL limitations, depression, and study sites.

p<0.05;

^†

p<0.01;

^‡

p<0.001