Table 2.
Main effect of condition for patients with CLBP and healthy controls (HC; A) oxyhemoglobin ([O2Hb]) and (B) deoxyhemoglobin ([HHb]).
| [O2Hb]All | [O2Hb]Responders | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| CLBP | HC | CLBP | HC | ||||||
| Region | Channels | q (FDR) | χ2 | q (FDR) | χ2 | q (FDR) | χ2 | q (FDR) | χ2 |
| A | |||||||||
| SMA | 1 | ||||||||
| 3 | |||||||||
| 4 | 0.0304 | 8.042 | |||||||
| 5 | 0.016 | 13.3 | 0.016 | 11.645 | |||||
| 6 | 0.02 | 11.1 | 0.03 | 8.444 | |||||
| S1 | 7 | 0.0627 | 6.136 | ||||||
| 8 | |||||||||
| 9 | 0.064 | 7.5 | 0.0304 | 7.875 | |||||
| 11 | 0.086 | 6.3 | 0.03 | 9.22 | |||||
| 12 | 0.048 | 8.4 | 0.000 | 15.460 | |||||
| 13 | |||||||||
| 14 | 0.08 | 6.7 | 0.03 | 8.667 | |||||
| 15 | 0.032 | 10.167 | 0.048 | 6.821 | |||||
| 16 | 0.03 | 8.522 | |||||||
| 17 | 0.032 | 10.5 | 0.02 | 10.8 | 0.000 | 15.216 | |||
| 18 | 0.032 | 12.167 | 0.016 | 12.1 | 0.03 | 9.418 | |||
| B | [HHb]All | [HHb]Responders | |||||||
| SMA | 1 | 0.064 | 11.1 | ||||||
| 3 | |||||||||
| 4 | |||||||||
| 5 | 0.096 | 10.383 | |||||||
| 6 | |||||||||
| S1 | 7 | ||||||||
| 8 | |||||||||
| 9 | |||||||||
| 11 | |||||||||
| 12 | |||||||||
| 13 | |||||||||
| 14 | |||||||||
| 15 | |||||||||
| 16 | |||||||||
| 17 | |||||||||
| 18 | |||||||||
Channels 1–6 belong to the bilateral supplementary motor area (SMA) while channels 7–18 belong to the bilateral primary somatosensory cortex (S1). The subscript “All” means that all, responding and non-responding channels, were included for analysis whereas in the “Responders” group only the responding channels were included. Shown are significant channels as well as tendencies, both corrected for multiple comparisons by applying false discovery rate (FDR) correction (q < 0.05).