Table 3.
Subjective sleep outcomes | SCD, mean (SD) | ±95% CI | Controls, mean (SD) | ± 95% CI | F | df | R2 | P | Significant predictors |
---|---|---|---|---|---|---|---|---|---|
TIB (minutes) | 486 (49) | 468–503 | 480 (52) | 463–497 | 2.43 | 5, 64 | 0.16 | .044 | Age |
Night-to-night variability | 45 (20) | 38–53 | 53 (22) | 46–61 | 2.27 | 5, 64 | 0.15 | .058 | – |
TST (minutes) | 405 (46) | 388–421 | 418 (49) | 402–434 | 1.07 | 5, 64 | 0.08 | .383 | – |
Night-to-night variability* | 44 (16) | 38–49 | 49 (19) | 42–55 | 1.72 | 5, 63 | 0.12 | .143 | – |
SOL (minutes)*† | 9 (6) | 7–12 | 6 (4) | 5–7 | 4.34 | 5, 63 | 0.26 | .002 | Depressive symptoms, apnea risk |
Night-to-night variability*† | 9 (7) | 7–12 | 6 (5) | 4–7 | 2.76 | 5, 63 | 0.18 | .026 | Depressive symptoms |
WASO (minutes)† | 69 (26) | 60–79 | 55 (31) | 45–66 | 2.42 | 5, 64 | 0.16 | .044 | SCD |
Night-to-night variability | 27 (15) | 22–33 | 23 (15) | 18–28 | 1.60 | 5, 64 | 0.11 | .172 | – |
N awakenings | 16.3 (5.1) | 14.5–18.2 | 15.0 (5.8) | 13.1–16.9 | 1.27 | 5, 64 | 0.09 | .286 | – |
Night-to-night variability | 4.5 (1.7) | 3.8–5.1 | 4.5 (1.7) | 4.0–5.0 | 0.71 | 5, 64 | 0.05 | .620 | – |
Average length of the awakenings (minutes) | 4.9 (2.3) | 4.1–5.7 | 3.7 (1.0) | 3.4–4.0 | 2.23 | 5, 64 | 0.15 | .061 | – |
Night-to-night variability | 2.3 (1.9) | 1.6–3.0 | 1.2 (0.7) | 1.0–1.5 | 2.51 | 5, 64 | 0.16 | .039 | SCD |
Awakening index | 2.4 (0.7) | 2.2–2.7 | 2.2 (0.9) | 1.9–2.5 | 1.50 | 5, 64 | 0.11 | .204 | – |
SE (%) | 83 (5) | 82–85 | 87 (6) | 86–89 | 2.73 | 5, 64 | 0.18 | .027 | SCD |
Night-to-night variability* | 6 (3) | 5–7 | 5 (3) | 4–5 | 1.80 | 5, 63 | 0.13 | .125 | – |
Abbreviations: SCD, subjective cognitive decline; SD, standard deviation; CI, confidence interval; TIB, time in bed; TST, total sleep time; SOL, sleep onset latency; WASO, wake after sleep onset; SE, sleep efficiency.
One SCD participant has been excluded (value exceeding 3 SD of the mean).
Analysis based on log-transformed data.