Table 2.
Study measure comparisons: healthy controls vs. psychiatry controls vs. epilepsy controls
| Measure | Mean value for psychiatry controls (n = 25) | Mean value for healthy controls (n = 17) | Mean value for epilepsy controls (n = 8) | t (p value) psychiatry vs. healthy controls epilepsy vs. healthy controls |
|---|---|---|---|---|
| Baseline HR and respiratory rate | ||||
| Baseline HR (bpm) | 87.16 | 77.24 | 86.50 | −2.412 (0.021) −1.870 (0.074) |
| Clinical baseline breathing rate (breaths per minute) | 18.00 range (8–24) | 19.71 range (8–31) | Missing data | 1.628 (0.116) – |
| Hyperventilation challenge PCO2 measures | ||||
| Baseline PCO2 (mmHg) | 41.20 | 41.06 | 41.13 | −0.130 (0.897) −0.042 (0.967) |
| ∆PCO2 (mmHg) | 13.88 | 15.47 | 17.00 | 1.397 (0.170) −0.944 (0.355) |
| Trough-PCO2 (mmHg) | 27.32 | 25.59 | 25.00 | −1.435 (0.159) 0.485 (0.632) |
| Time to trough PCO2 (min) | 5.16 | 5.53 | 4.88 | 1.469 (0.150) 1.674 (0.108) |
| Rate of PCO2 drop (mmHg/min) | 2.76 | 2.89 | 2.83 | 0.451 (0.654) −1.905 (p = .069) |
| Recovery measures | ||||
| Rate of PCO2 recovery (mmHg/min) | 4.00 | 5.56 | 3.63 | 1.482 (0.153) 1.302 (0.206) |
| Final PCO2 (mmHg) | 41.26 | 43.65 | 44.13 | −1.012 (0.318) −1.641 (0.114) |