Table 1.
Participant Characteristics by Sleep Curtailment Category (N=1,046)
| Characteristic | Sleep curtailment score: 0=maximal curtailed sleep to 13=never curtailed sleep | ||||
|---|---|---|---|---|---|
| 0 to 4 41 (4%) |
5 to 7 129 (12%) |
8 to 9 151 (15%) |
10 to 11 306 (29%) |
12 to 13 419 (40%) |
|
| Mean (SD) or N (%) | |||||
| Sleep curtailment score | 3.20 (1.30) | 6.09 (1.02) | 8.61 (0.65) | 10.59 (0.62) | 12.46 (0.54) |
| Maternal/Household Characteristics | |||||
| College graduate, % | 14 (34) | 62 (49) | 95 (62) | 233 (76) | 337 (81) |
| Household income >70k/year, % | 11 (27) | 60 (47) | 81 (54) | 205 (67) | 311 (74) |
| Child Characteristics | |||||
| Race/ethnicity, % | |||||
| Asian | 2 (4) | 7 (5) | 6 (4) | 10 (3) | 10 (2) |
| Black | 15 (36) | 43 (33) | 42 (28) | 39 (13) | 17 (4) |
| Hispanic | 4 (9) | 11 (8) | 6 (4) | 6 (2) | 10 (2) |
| Other | 12 (29) | 19 (15) | 17 (11) | 38 (12) | 39 (9) |
| Non-Hispanic White | 9 (21) | 49 (38) | 81 (54) | 213 (70) | 343 (82) |
| Female, % | 23 (57) | 51 (39) | 74 (49) | 151 (49) | 226 (54) |
| Sleep duration, hours/day | |||||
| 6 months | 10.17 (2.42) | 11.00 (2.17) | 11.46 (2.47) | 12.17 (1.96) | 13.09 (1.65) |
| 1 year | 10.64 (2.31) | 11.63 (2.19) | 12.20 (1.90) | 12.73 (1.67) | 13.47 (1.24) |
| 2 years | 10.12 (1.44) | 10.71 (1.39) | 11.43 (1.38) | 12.02 (1.14) | 12.61 (0.84) |
| 3 years | 9.53 (1.26) | 9.97 (1.24) | 10.67 (1.40) | 11.18 (1.12) | 11.82 (0.83) |
| 4 years | 9.37 (0.96) | 9.85 (1.14) | 10.37 (1.12) | 10.78 (1.06) | 11.36 (0.83) |
| 5 years | 8.88 (1.42) | 9.82 (1.58) | 10.24 (1.27) | 10.63 (1.06) | 11.03 (0.96) |
| 6 years | 8.85 (1.33) | 9.47 (1.28) | 9.98 (1.11) | 10.31 (1.06) | 10.65 (0.78) |
| 7 years | 8.26 (1.04) | 8.99 (1.13) | 9.44 (1.04) | 9.93 (0.81) | 10.32 (0.59) |
| Mid-Childhood, 7-Year Visit | |||||
| BMI z-score | 0.98 (1.03) | 0.57 (1.03) | 0.49 (0.96) | 0.36 (1.00) | 0.21 (0.93) |
| Television, hours/day | 2.35 (1.43) | 2.00 (1.36) | 1.70 (1.20) | 1.52 (1.02) | 1.28 (0.83) |
| Family dinner, times/week | 4.93 (2.46) | 5.01 (2.41) | 5.48 (2.29) | 5.52 (2.06) | 5.78 (1.73) |
| Skipping breakfast, times/week | 0.61 (1.22) | 0.54 (1.45) | 0.32 (1.09) | 0.25 (0.97) | 0.19 (0.77) |
| Fast food, servings/week | 0.82 (0.91) | 0.88 (1.13) | 0.72 (0.90) | 0.70 (0.87) | 0.62 (0.72) |
| Youth Healthy Eating Index | 54.39 (13.63) | 54.49 (11.23) | 57.5 (11.12) | 58.81 (10.08) | 60.92 (10.80) |
| Fruit, servings/day | 1.20 (1.14) | 1.29 (1.32) | 1.60 (1.58) | 1.69 (1.45) | 1.70 (1.32) |
| Vegetables, servings/day | 1.22 (1.26) | 1.18 (1.08) | 1.29 (1.02) | 1.35 (0.90) | 1.35 (0.94) |
| Whole grains, servings/day | 0.55 (0.65) | 0.66 (0.86) | 0.76 (0.95) | 0.79 (0.90) | 0.97 (0.98) |
| Total dairy, servings/day | 1.97 (1.63) | 1.92 (1.66) | 2.12 (1.73) | 2.47 (1.74) | 2.40 (1.54) |
| Red/processed meats, servings/day | 0.50 (0.64) | 0.54 (0.67) | 0.47 (0.44) | 0.55 (0.48) | 0.49 (0.44) |
| Sweet/salty snacks, servings/day | 0.26 (0.38) | 0.38 (0.50) | 0.29 (0.36) | 0.38 (0.39) | 0.37 (0.34) |
| Sugary drinks, servings/day | 0.68 (1.18) | 0.57 (1.09) | 0.43 (0.96) | 0.34 (0.67) | 0.25 (0.51) |