Table 2.

Cross-sectional (ARIC Visit 3, 1993–1995) association of race-specific 25(OH)D tertiles with cognitive test scores.

	DWRT β (95% CI)	DSST β (95% CI)	WFT β (95% CI)
Whites (n=852)
25(OH)D ≥28.3 ng/ml	0.00 (reference)	0.00 (reference)	0.00 (reference)
25(OH)D 21.8–<28.3 ng/ml	−0.04 (−0.27, 0.20)	−0.20 (−1.78, 1.37)	−0.86 (−2.64, 0.93)
25(OH)D <21.8 ng/ml	−0.11 (−0.36, 0.13)	0.46 (−1.16, 2.09)	1.35 (−0.49, 3.20)
Blacks (n=800)
25(OH)D ≥19.3 ng/ml	0.00 (reference)	0.00 (reference)	0.00 (reference)
25(OH)D 14.0–<19.3 ng/ml	−0.02 (−0.31, 0.26)	−0.06 (−1.85, 1.73)	0.12 (−1.86, 2.10)
25(OH)D <14.0 ng/ml	−0.01 (−0.31, 0.28)	0.66 (−1.19, 2.51)	−0.18 (−2.23, 1.86)

Model is adjusted for demographics variables (age, sex) and behavioral/socioeconomic variables (education, income, physical activity, smoking, alcohol use, body mass index, waist circumference, and vitamin D supplementation).

Abbreviations: 25(OH)D, 25-hydroxyvitamin D; CI, confidence interval; DWRT, Delayed Word Recall Test; DSST, Digit Symbol Substitution Test; WFT, Word Fluency Test.