Table 2.
Possible confounding variables for memory decliners and maintainers at initial recordings
| DECLINER (−) | MAINTAINER(+) | p ‐ values | |
|---|---|---|---|
| N | 20 | 14 | |
| Overnight memory change | −6.35 ± 5.61 | 2.43 ± 2.03, | < .001* |
| Immediate recall | 55.35 ± 16.66 | 48.14 ± 26.20 | .33 |
| IQ | 105.5 ± 6.21 | 109.29 ± 8.03 | .13 |
| Age | 9.50 ± 0.83 | 9.36 ± 0.74 | .61 |
| Puberty Score | 1.65 ± 0.88 | 1.43 ± 0.85 | .47 |
| Sleep architecture | BASELINE | EXPERIMENTAL | BASELINE | EXPERIMENTAL | BASE(‐)*BASE(+) | EXP(‐)*EXP(+) |
|---|---|---|---|---|---|---|
| TIB(min) | 573.90 ± 37.19 | 588.25 ± 40.20 | 599.89 ± 43.85 | 589.14 ± 36.73 | .07 | .95 |
| SOL to N2(min) | 19.25 ± 11.07 | 23.25 ± 20.39 | 20.61 ± 9.89 | 24.68 ± 7.41 | .72 | .80 |
| WASO(min) | 14.48 ± 16.64 | 6.70 ± 6.24 | 11.54 ± 9.93 | 12.18 ± 12.04 | .56 | .09 |
| TST(min) | 542.65 ± 39.16 | 563.55 ± 32.78 | 573.79 ± 44.64 | 560.00 ± 39.22 | .04* | .78 |
| EFF(%) | 94.59 ± 3.47 | 95.80 ± 3.04 | 95.76 ± 2.11 | 95.03 ± 2.12 | .27 | .42 |
| N1(%) | 3.09 ± 3.10 | 2.42 ± 1.85 | 2.69 ± 1.60 | 2.91 ± 1.85 | .66 | .45 |
| N2(%) | 45.20 ± 6.83 | 44.56 ± 9.03 | 43.85 ± 8.47 | 43.42 ± 9.03 | .61 | .69 |
| N3(%) | 25.65 ± 10.1 | 25.11 ± 10.72 | 27.5 ± 9.40 | 26.12 ± 10.72 | .59 | .76 |
| R(%) | 26.06 ± 7.03 | 27.91 ± 7.91 | 25.96 ± 4.8 | 27.55 ± 7.59 | .96 | .89 |
TIB, time in bed; SOL to N2, sleep onset latency; WASO, wake after sleep onset; TST, total sleep time; EFF, sleep efficiency.
Asterisks indicate a significant difference at the .05 level