Table 2.
Average nighttime sleep duration* (in minutes) by demographic and sleep environment characteristics
| N | Mean (SD) | Range | p-value | |
|---|---|---|---|---|
| Total Group | 93 | 553.2 (76.9) | 319.0 - 711.7 | |
| Sex | ||||
| Male | 52 | 560.4 (67.2) | 385.6 - 71141.7 | 0.31 |
| Female | 41 | 544.0 (87.6) | 319.0 - 700.0 | |
| Race/Ethnicity a | ||||
| Black | 26 | 506.2 (73.6) | 319.0 - 711.7 | <0.001 |
| Hispanic/Latino | 15 | 551.1 (70.0) | 460.6 - 666.7 | |
| White | 47 | 584.3 (64.2) | 368.6 - 700.0 | |
| Other | 5 | 510.9 (97.3) | 385.6 - 611.5 | |
| Parent Education | ||||
| Less than college | 31 | 517.2 (73.3) | 319.0 - 657.5 | 0.002 |
| College graduate | 60 | 570.0 (72.9) | 368.6 - 711.7 | |
| Bedtime | ||||
| Consistent | 74 | 565.6 (70.9) | 385.6 - 711.7 | 0.002 |
| Changes | 19 | 504.8 (82.0) | 319.0 - 624.0 | |
| Sleep Position | ||||
| Supine | 37 | 546.9 (86.4) | 319.0 - 711.7 | 0.22 |
| Prone | 28 | 577.8 (71.9) | 385.6 - 700.0 | |
| Mixed | 9 | 531.6 (71.3) | 404.3 - 647.2 | |
| Side | 19 | 539.3 (61.4) | 431.1 - 636.2 | |
| Sleep Location b | ||||
| Crib in own room | 28 | 610.2 (47.0) | 495.2 - 700.0 | <0.001 |
| Crib in parent's room | 33 | 534.0 (76.2) | 368.6 - 711.7 | |
| Bed sharing | 10 | 504.0 (62.2) | 407.0 - 619.2 | |
| Other | 21 | 535.2 (77.7) | 319.0 - 634.4 |
*
Nighttime sleep duration was standardized by wear time and extrapolated into 12 hours, to represent total sleep duration between 7PM - 7AM.
a
Black and White differ; No differences seen in all other pairwise comparisons.
b
Crib in own room differs from crib in parent’s room, bed sharing and other locations; No differences seen in all other pairwise comparisons.