Table 14.
Standardizing SDs Pertaining to Trials Combined Using SMD Method
| Study | Trial Level | IPD (Pooled SD) | ||
|---|---|---|---|---|
| PWV (m/s) (Vitamin D, Placebo) | Microvascular Function (Units) (Vitamin D, Placebo) | PWV (m/s) | Microvascular Function (Units) | |
| Gepner 201215 | 0.9, 1.1 | ··· | 1.0 | ··· |
| Larsen 201216 | 0.9, 1.4 | ··· | 1.2 | ··· |
| Marckmann 201217 | 2.6, 2.6 | ··· | 3.1 | ··· |
| Stricker 201219 | ··· | 16.4, 12.4 | ··· | 13.4 |
| Hewitt 201322 | 5.3, 4.8 | ··· | ··· | ··· |
| Witham 201323 | 1.4, 1.3 | ··· | 1.2 | ··· |
| Witham 201325 | 1.2, 1.6 | 1.1, 3.3 | 1.2 | 1.8 |
| Yiu 201326 | 3.4, 4.1 | ··· | ··· | ··· |
| Dreyer 201427 | 1.1, 0.8 | 727, 391 | 1.0 | 591 |
| Mose 201429 | 2.1, 2.4 | ··· | 2.3 | ··· |
| Ryu 201430 | 1.4, 1.8 | ··· | ··· | ··· |
| Garg 201532 | 1.3, 1.2 | ··· | 1.1 | ··· |
| Pilz 201533 | 1.6, 1.6 | ··· | 1.9 | ··· |
| Witham 201535 | 2.5, 1.6 | ··· | 0.9 | ··· |
| Bressendorff 201638 | 0.9, 0.4 | ··· | 1.1 | ··· |
| Forouhi 201640 | 2.1, 1.7 | ··· | 1.7 | ··· |
| Hin 201741 | 1.4, 1.4 | ··· | 3.7 | ··· |
IPD indicates individual participant data; PWV, pulse wave velocity; SMD, standardized mean difference.