Table 8.
Average Pearson correlation between episodic memory performance and select sleep parameters with the 95% confidence interval
| Sleep Parameter | r | LL | UL | k | j | p |
|---|---|---|---|---|---|---|
| Wake After Sleep Onset | 0.11 | −0.03 | 0.24 | 8 | 25 | .11 |
| Sleep Onset Latency | 0.16 | 0.01 | 0.30 | 7 | 19 | .03 |
| Sleep Duration | 0.11 | 0.00 | 0.22 | 16 | 45 | .06 |
| Stage 1 | 0.20 | 0.07 | 0.32 | 10 | 28 | .002 |
| Stage 2 | 0.15 | 0.04 | 0.26 | 16 | 45 | .009 |
| Slow Wave Sleep | 0.16 | 0.07 | 0.26 | 20 | 82 | <.001 |
| REM sleep | 0.02 | −0.07 | 0.12 | 16 | 108 | .623 |
| NREM sleep | 0.20 | 0.08 | 0.31 | 11 | 42 | <.001 |
| Spindle Density | 0.18 | 0.08 | 0.28 | 14 | 83 | <.001 |
NOTE: All sleep stage estimates refer to the percentage or duration for the given sleep stage. LL = lower confidence interval; UL = upper confidence interval; k = the number of studies; j = the number of effect sizes; REM = rapid eye movement sleep; NREM = non-rapid eye movement sleep.