so-tDCS/sham interval count and sleep architecture
| so-tDCS | Sham | ||||
|---|---|---|---|---|---|
| Distribution of stimulation counts during the nap (n) | |||||
| 5 blocks | 12 | 10 | |||
| 4 blocks | 2 | 3 | |||
| 3 blocks | 2 | 3 | |||
| Mean (SD) | MD | Mean (SD) | MD | p | |
|---|---|---|---|---|---|
| Sleep time excluding movement periods and so-tDCS/sham (min) | 48.8 (13.2) | 49.5 | 51.6 (11.6) | 56.00 | 0.569a |
| Proportion of total sleep time (including so-tDCS/sham) spent in different sleep stages (%) | |||||
| WASO | 14.7 (11.9) | 11.3 | 20.36 (1) | 15.1 | 0.218 |
| NREM stage 1 | 15.1 (5.7) | 11.8 | 16.6 (5.1) | 14.1 | 0.959 |
| NREM stage 2 | 27.9 (6.7) | 28.9 | 24.4 (7.8) | 22.8 | 0.258 |
| NREM stage 3 | 2.7 (1.1) | 0.3 | 2.7 (1.7) | 0.0 | 0.504a |
| NREM stage 4 | 1.1 (1.1) | 0.0 | 0.2 (0.1) | 0.0 | 1.000a |
| REM | 2.3 (1.3) | 0.0 | 3.1 (1.3) | 0.0 | 0.600a |
| Proportion of time during stimulation-free intervals spent in different sleep stages (%) | |||||
| WASO | 7.44 (10.5) | 0.0 | 14.7 (15.0) | 11.7 | 0.062a |
| NREM stage 1 | 7.5 (11.6) | 3.3 | 15.8 (19.9) | 11.7 | 0.091a |
| NREM stage 2 | 70.3 (21.0) | 69.5 | 51.5 (18.4) | 53.3 | 0.021 |
| NREM stage 3 | 12.8 (11.9) | 10.0 | 10.4 (14.2) | 4.9 | 0.451a |
| NREM stage 4 | 2.8 (9.5) | 0.0 | 3.1 (9.5) | 0.0 | 1.000a |
| REM | 0.0 (0.0) | 0.0 | 2.3 (6.3) | 0.0 | 0.180a |
Sleep time is the elapsed time from sleep onset to the end of nap. Comparisons are based on paired-samples t test unless indicated otherwise. *p < 0.05.
WASO, Wake after sleep onset; MD, median.
↵aWilcoxon signed-rank test due to skewed distributions.