Patient Global Impression of Change
| Group 1 | Group 2* | |
| Average PGIC (SD, N) | Average PGIC (SD, N) | |
| Week 4* | 1.4 (1.1, 11) | 0.6 (1.3, 13) |
| Week 8 (EOT) | 2.2 (0.9, 10)† | 1.3 (1.0, 11) |
| Month 3 | 1.9 (0.9, 10)† | 1.0 (0.8, 10) |
| Month 12 | 1.8 (1.3, 8) | 1.2 (1.5, 4) |
*Group 2 crossed over at week 4 to receive 4 weeks of active stimulation.
†P<0.05 compared with group 2 at the end of the placebo period.
EOT, end of treatment; PGIC, Patient Global Impression of Change.