Table 3.

Summary of statistic results in our meta-analysis and subgroup analysis.

	Subgroup	SMD	95% CI	P-value	Heterogeneity
Hcy	AD	0.689	[0.569, 0.809]	0.000	85.2%
	VAD	1.228	[0.818, 1.639]	0.000	90.9%
	Caucasian	0.872	[0.727, 1.016]	0.000	89%
	Asian	0.546	[0.368, 0.723]	0.000	69.1%
	Age 60–70	0.519	[0.288, 0.75]	0.000	50.4%
	Age 70–80	0.826	[0.695, 0.959]	0.000	86.7%
	Age 80–90	0.961	[0.438, 1.485]	0.000	94.2%
	AD vs. VAD Male Female	−0.278 1.24 0.71	[−0.466, −0.09] [0.91–1.58] [0.53–0.88]	0.004 0.000 0.000	65.7% 90.7% 87.9%
Folate	AD	−0.503	[−0.644, −0.362]	0.000	85.5%
	VAD	−0.796	[−1.2, −0.393]	0.000	82.6%
	Caucasian	−0.676	[−0.856, −0.497]	0.000	87.8%
	Asian	−0.256	[−0.377, −0.314]	0.000	46.2%
	Age 60–70	−0.262	[−0.486, −0.037]	0.022	85.8%
	Age 70–80	−0.574	[−0.731, −0.418]	0.000	85.4%
	Age 80–90	−0.69	[−1.190, −0.193]	0.000	90.5%
	AD vs. VAD Male Female	0.032 −0.64 −0.57	[−0.132, 0.196] [−0.97, −0.3] [−0.74, −0.39]	0.703 0.000 0.000	20.2% 84.1% 85.4%

SMD, standard mean differences; 95 %CI, confidence interval.