Table 3.
The influence of relevant factors on Hcy in PD patients in the meta-analysis.
| Factors | Sample size | No. of studies | SMD [95% CI] | P value | Test of heterogeneity | Egger’s test for publication bias | |||
|---|---|---|---|---|---|---|---|---|---|
| case | control | I 2 | P value | t | p value | ||||
| Hhcy | 38 (Yes) | 69 (No) | 3 | 10.82 [8.92, 12.71] | <0.001 | 0 | 0.90 | 1.57 | 0.1172 |
| H and Y | 96 (4 ~ 5) | 156 (2 ~ 3) | 1 | 0.45 [0.19,0.70] | <0.001 | / | / | / | / |
| 96 (4 ~ 5) | 61 (1 ~ 2) | 1 | 0.46 [0.15,0.78] | <0.001 | / | / | / | / | |
| 315 (2 ~ 3) | 61 (1 ~ 2) | 4 | 0.34 [−0.04,0.72] | 0.08 | 71 | 0.02 | 1.36 | 0.1742 | |
| Levodopa therapy | 162 (Yes) | 58 (No) | 3 | 0.72 [0.08, 1.36] | 0.03 | 71 | 0.03 | 0.52 | 0.6015 |
| CI or dementia | 221 (Yes) | 438 (No) | 5 | 0.54 [0.38, 0.71] | <0.001 | 7 | 0.37 | −0.98 | 0.3272 |
| Age | 103 (70~) | 129 (60 ~ 70) | 3 | 0.58 [0.30, 0.85] | <0.001 | 0 | 0.82 | 0.52 | 0.6015 |
| 24 (70~) | 30 (~60) | 2 | 0.84 [0.28, 1.41] | 0.004 | 35 | 0.22 | / | / | |
| 45 (60 ~ 70) | 14 (~60) | 1 | 0.78 [0.16, 1.39] | 0.01 | / | / | / | / | |
H and Y, Hoehn and Yahr Stage; CI, cognitive impairment.