Table 3. Statistics for amplitudes at Fz used in the meta-analysis.
| Study | N | Low load (μV) | High load (μV) | Mean Diff (low-high) | SD Diff | t | 95% CI | |
|---|---|---|---|---|---|---|---|---|
| LL | UL | |||||||
| Kramer et al. (1995) | 10 | -1.05 | 0.19 | -1.24 | 1.73a | -2.26a | -2.48a | -0.01a |
| Singhal et al.(2002) | 20 | -2.80 | -2.40 | -0.40 | 0.81 | -2.20 | -0.78 | -0.02 |
| Haroush et al. (2010) | 13 | -2.20 | -1.87 | -0.33 | 0.61 | -1.96 | -0.70 | 0.04 |
| Yucel et al. (2005, JoCN) | 13 | -2.67 | -1.06 | -1.61 | 2.69 | -2.16 | -3.23 | 0.01 |
| Yucel et al. (2005 NR) | 13 | -2.75 | -2.14 | -0.61 | 1.13 | -1.94 | -1.30 | 0.07 |
| Muller-Gass et al. (2007)a | 9 | - | - | 0.00 | 1.51 | 0.00 | -1.16 | 1.16 |
| Zhang et al. (2006) | 11 | -1.18 | -2.10 | 0.92 | 0.79a | 3.84a | 0.39a | 1.45a |
| Present study | 28 | -1.93 | -1.90 | -0.03 | 2.27 | -0.06 | -0.91 | 0.85 |
aValues were estimated.