Variable | M or % | (SD or n) |
---|---|---|
Demographic and household | ||
 Sexa | ||
  Female | 53% | (315) |
  Male | 47% | (275) |
 Race/ethnicity | ||
  Black/African American | 41% | (241) |
  Hispanic and/or Latino | 25% | (148) |
  White/Caucasian | 19% | (112) |
  Other,b mixed, or none | 15% | (89) |
 Body mass index (BMI) percentilec | 73.88 | (24.96) |
 Annual household income | $65,794 | ($61,776) |
 Adolescent living arrangements | ||
  Does not live with two biological parents | 68% | (401) |
  Lives with two biological parents | 32% | (189) |
 Primary caregiver highest education completed | ||
  Less than high school | 14% | (81) |
  High school | 18% | (105) |
  Some college | 47% | (276) |
  College | 22% | (128) |
Emotional health | ||
 Boredomd | 1.19 | (.88) |
 Lonelinessd | .52 | (.76) |
 Happinessd | 2.19 | (.90) |
 Depressive symptoms scoree | .60 | (.59) |
School attendance | ||
 Attended school (proportion of days) | .43 | (.34) |
Nightly sleep measuresf | ||
 Sleep duration (hrs) | 7.80 | (1.07) |
 Sleep onset (clock time) | 0:27 | (1:44) |
 Sleep midpoint (clock time) | 4:21 | (1:42) |
 Sleep offset (clock time) | 8:19 | (1:46) |
 Sleep maintenance efficiency (%) | 90.71 | (3.39) |
 Subjective sleep qualityg | 2.35 | (.50) |
Sleep variability measuresh | ||
 Variability (SD) of sleep duration (hrs) | 1.56 | (.80) |
 Variability (SD) of sleep onset (hrs) | 1.29 | (.73) |
 Variability (SD) of sleep midpoint (hrs) | 1.22 | (.65) |
 Variability (SD) of sleep offset (hrs) | 1.57 | (.91) |
 Sleep regularity indexi | 48.49 | (13.24) |
 Social jetlag (hrs)j | 1.80 | (1.15) |
Dietary intake | ||
 Consumed breakfast (proportion of days)k | .70 | (.33) |