Table 3.
CERAD-WL Immediate and Delayed Recall Performance by Sleep Duration (B, 95% CI)
| Linear trend† (≤7h) | Sleep Duration, Hours per Day | Linear trend† (≥7 h) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| F stat | p-value | 2-4 | 5 | 6 | 7 | 8 | 9 | ≥10 | F stat | p-value | |||
| df | B (95% CI) | B (95% CI) | B (95% CI) | B (95% CI) | B (95% CI) | B (95% CI) | df | ||||||
| CERAD Word Learning Immediate Recall | |||||||||||||
| Unadjusted | 2.08 | 1, 15 | 0.1696 | −1.03 (−2.60, 0.54) | −1.36 (−2.59, −0.13)* | −0.84 (−1.71, 0.03) | Ref. | −1.04 (−1.82, −0.27)* | −1.51 (−3.21, 0.19) | −2.57 (−3.79, −1.36)* | 22.90 | 1, 15 | 0.0002 |
| Adjusted‡ | 0.32 | 1, 15 | 0.5784 | −0.50 (−1.78, 0.78) | −0.68 (−1.70, 0.35) | −0.43 (−1.25, 0.39) | Ref. | −0.65 (−1.33, 0.03) | −0.88 (−2.28, 0.53) | −2.26 (−3.85, −0.68)* | 8.84 | 1, 15 | 0.0095 |
| CERAD Word Learning Delayed Recall | |||||||||||||
| Unadjusted | 4.48 | 1, 15 | 0.0514 | −0.58 (−1.22, 0.06) | −0.41 (−1.05, 0.22) | −0.29 (−0.71, 0.13) | Ref. | −0.66 (−1.10, −0.22)* | −1.01 (−1.84, −0.19)* | −1.58 (−2.55, −0.62)* | 14.66 | 1, 15 | 0.0016 |
| Adjusted‡ | 0.13 | 1, 15 | 0.7285 | −0.34 (−1.06, 0.38) | −0.09 (−0.51, 0.34) | −0.10 (−0.55, 0.35) | Ref. | −0.46 (−0.87, −0.05)* | −0.69 (−1.34, −0.04)* | −1.41 (−2.56, −0.27)* | 7.04 | 1, 15 | 0.0181 |
*
P < 0.05
‡
Adjusted for age, sex, race, education, depressive symptoms, and sedative medication use
†
Contrast of marginal linear predictions, df = degrees of freedom, F stat = F statistic