In the article “Human Hippocampal Structure: A Novel Biomarker Predicting Mnemonic Vulnerability to, and Recovery from, Sleep Deprivation” by Jared M. Saletin, Andrea N. Goldstein-Piekarski, Stephanie M. Greer, Shauna Stark, Craig E. Stark, and Matthew P. Walker, which appeared on pages 2355–2363 of the February 24, 2016 issue, misalignment of the left-hand margin was accidentally introduced into Table 3 when incorrect margin headers were added, creating a mismatch with the data in the left-hand margin. The table has been corrected on the on-line PDF version, and a corrected version is displayed below.
Table 3.
Recovery sleep statisticsa
| Mean | SEM | |
|---|---|---|
| Sleep continuity | ||
| Total dark time (min) | 87.33 | 2.06 |
| Total sleep time (min) | 82.02 | 1.95 |
| Sleep efficiency (%) | 97.57 | 0.72 |
| Latency to sleep onset (min) | 3.00 | 0.38 |
| Wake after sleep onset (min) | 1.69 | 0.58 |
| Sleep architecture | ||
| Stage 1 (% TST) | 1.24 | 0.05 |
| Stage 2 (% TST) | 25.75 | 2.46 |
| Stage 3 (% TST) | 14.19 | 2.11 |
| Stage 4 (% TST) | 52.50 | 3.21 |
| Slow-wave sleep (% TST) | 66.69 | 2.74 |
| REM sleep (% TST) | 6.19 | 1.93 |
aSleep stages are presented as the percentage of total sleep time; slow wave sleep (Stages 3 and 4). REM, Rapid eye movement; TST, total sleep time.