Table 2.
Average scores on cognitive outcomes by sleep disturbance group.
| All Mean (SD) |
Normal Sleep Mean (SD) |
Sleep Disturbance Mean (SD) |
t(df) | p-Value | |
|---|---|---|---|---|---|
| GEC T-score, n = 100 | 53.89 (12.43) | 47.42 (9.48) | 56.8 (12.55) | −3.7 (98) | <0.001 |
| Neurocognitive Index (NCI) z-score, n = 79 | −0.05 (1.01) | 0.24 (0.91) | −0.20 (1.04) | 1.9 (77) | 0.06 |
| Numbers combined, n = 108 | 8.40 (2.73) | 8.78 (2.67) | 8.20 (2.76) | 1.1 (106) | 0.29 |
| Lists Immediate, n = 110 | 8.50 (2.70) | 8.67 (2.94) | 8.42 (2.59) | 0.5 (108) | 0.67 |
| Lists Delayed, n = 111 | 8.60 (3.29) | 8.76 (3.48) | 8.53 (3.22) | 0.3 (109) | 0.74 |
| DKEFS number letter switching, n = 85 | 7.21 (4.05) | 8.10 (3.32) | 6.75 (4.33) | 1.5 (83) | 0.11 |
| DKEFS category fluency, n = 88 | 9.69 (3.53) | 10.06 (3.90) | 9.49 (3.33) | 0.7 (86) | 0.49 |
| DKEFS letter fluency, n = 87 | 8.14 (2.81) | 7.90 (2.66) | 8.27 (2.91) | −0.6 (85) | 0.56 |
| Combined coding, n = 105 | 8.31 (3.09) | 8.97 (2.96) | 8.00 (3.13) | 1.5 (103) | 0.13 |
| Combined symbol search, n = 105 | 9.59 (3.39) | 10.06 (2.44) | 9.37 (3.75) | 1.0 (103) | 0.26 |
| Word reading, n = 111 | 97.97 (16.02) | 99.76 (17.38) | 97.09 (15.36) | 0.8 (110) | 0.43 |
Sleep disturbance groups were compared with independent t-tests using 2-sided p-value; t(df): t-statistic (degrees of freedom); GEC: Global Executive Composite; DKEFS: Delis Kaplan Executive Function System.