Table 1.
Characteristics of the study sample
| Demographic characteristics | N | Percent or Mean(SD) |
|---|---|---|
| Gender | 93 | |
| Male | 52 | 55.9% |
| Female | 41 | 44.1% |
| Race/Ethnicity | 93 | |
| Non-Hispanic White | 47 | 50.5% |
| Non-Hispanic Black | 26 | 28.0% |
| Hispanic/Latino | 15 | 16.1% |
| Other | 5 | 5.4% |
| Parent Education | 91 | |
| College or above | 31 | 34.1% |
| Less than college | 60 | 65.9% |
| Age (weeks) | 93 | 30.1 (4.6) |
| BMI z score | 93 | 0.37 (1.2) |
| Physical activity and sleep characteristics | ||
| Accelerometry (7 AM – 7 PM) Ankle total counts |
89 | 80,242.9 (25,919.6) |
| Waist total counts | 81 | 33,778.9 (13,066.0) |
| Sleep actigraphy (7 PM – 7 AM) wear time total mins | 93 | 712.6 (14.3) |
| sleep time total mins | 93 | 547.4 (75.6) |
| wake time total mins | 93 | 164.8 (76.5) |
| Bedtime consistency | 92 | |
| Bedtime stays the same | 73 | 79.4% |
| Bedtime changes | 19 | 20.9% |
| Sleep position | 92 | |
| Supine | 37 | 40.2% |
| Prone | 28 | 30.4% |
| Side | 18 | 19.6% |
| Mixed | 9 | 9.8% |
| Sleeping location | 91 | |
| Crib in own room | 28 | 30.8% |
| Crib in parent’s room | 33 | 36.2% |
| Bed sharing | 10 | 11.0% |
| Other | 20 | 22.0% |