Table 2.

Association of cognition at the end of study with serum iron, tHcy, and Cys at baseline –Pearson correlation^*

Baseline variable (n = 92–97)	Semantic memory		Visuospatial episodic memory		Verbal episodic memory				Attention/processing speed
	LnGraded_Naming_2		LnPal_Totter_2		LnHVLT-TR_2		LnHVLT-DR_2		LnSDMT_2		LnMap_Search_2		LnTrail_Making_A_2
	β	p	β	p	β	p	β	p	β	p	β	p	β	p
	Placebo group
LnFe_1	–0.17	0.049	0.18	0.041	–0.15	0.072	–0.18	0.045
LnAl_1							–0.19	0.037	0.18	0.044	0.21	0.026	–0.20	0.027
LnHcy_1	–0.33	0.000	0.10	0.156	–0.36	0.000	–0.37	0.000	–0.31	0.000	–0.39	0.000	0.38	0.000
LnCys_1	–0.22	0.009	0.19	0.027					–0.23	0.009	–0.14	0.081	0.21	0.012
	B vitamin group
LnFe_1	0.07	0.241	0.06	0.280	–0.07	0.251	–0.06	0.298
LnAl_1							–0.06	0.282	0.02	0.426	–0.01	0.457	0.03	0.395
LnHcy_1	0.09	0.189	–0.04	0.333	0.03	0.366	0.07	0.236	–0.21	0.013	0.07	0.246	0.01	0.459
LnCys_1	0.09	0.189	–0.23	0.008					0.00	0.489	–0.02	0.415	–0.02	0.431

^*Ln, natural logarithm; _1, baseline; _2, end of study; one-sided T-test. Empty β and P cells indicate no correlation. Note: higher Pal_Totter_2 and Trail_Making_A_2 scores indicate worse cognitive performance.