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Subgroup analysis: stratification of the analysis according to different BDNF matrices used for BDNF measurements.
| Number of Studies | Number of Patients | Effect Size | Test for Subgroup Differences | |
|---|---|---|---|---|
| Serum | 6 | 195 cases 151 controls | MD: −0.93; 95% CI: −3.34, 1.48, p = 0.45, I2: 74%, p = 0.0001 | Chi2: 0.88, p = 0.35 |
| Plasma | 4 | 112 cases 85 controls | MD: 0.15; 95% CI: −0.09, 0.39, p = 0.23, I2: 58%, p = 0.07 |
MD: Mean Difference; CI: Confidence Interval; Chi2: chi-squared.
