Table 1.
Sleep Descriptive Statistics across Years as High School Grade or Post-High School Length
| 10th grade | 11th grade | 12th grade | 1-year post | 2-year post | 3-year post | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (n = 127–134) | (n = 148–154) | (n=111–124) | (n = 77–90) | (n = 68–79) | (n = 59–64) | |||||||
| Sleep dimension | M | SD | M | SD | M | SD | M | SD | M | SD | M | SD |
| Weekday duration (hr) | 7.56 | (0.96) | 7.22 | (107) | 7.27 | (115) | 7.52 | (100) | 7.20 | (128) | 7.16 | (121) |
| Weekend duration (hr) | 7.73 | (138) | 7.61 | (138) | 7.44 | (149) | 7.83 | (133) | 7.34 | (166) | 7.30 | (154) |
| Weekday efficiency (%) | 96.21 | (3.97) | 96.74 | (2.78) | 95.82 | (4.20) | 95.74 | (3.98) | 94.74 | (4.86) | 95.54 | (3.52) |
| Weekend efficiency (%) | 95.07 | (5.87) | 96.78 | (3.55) | 94.72 | (5.70) | 96.59 | (3.97) | 94.92 | (5.83) | 95.04 | (5.18) |
| Weekday latency (min) | 11.48 | (11.41) | 7.92 | (7.16) | 8.92 | (10.03) | 9.33 | (10.05) | 12.80 | (15.32) | 11.44 | (12.14) |
| Weekend latency (min) | 14.92 | (18.15) | 10.33 | (13.23) | 12.02 | (15.19) | 12.03 | (16.44) | 8.67 | (9.91) | 10.94 | (15.74) |
| Nightly variability (min) | 56.45 | (27.47) | 58.00 | (29.72) | 57.01 | (28.84) | 64.79 | (29.93) | 61.47 | (37.59) | 64.69 | (37.00) |
Note. n = number of observations for each year. The accelerated longitudinal design and two-year data collection intervals resulted in not all participants providing data for each year. Number of observations within each year varies because not every participant provided weekend actigraphy. Given the small observation size, 9th grade (n = 2) and 4-year post high school (n = 3) observations are not shown here.