Table 4.
Demographics and sleep duration of START study survey responders at Baseline (total and by school).
| Total | Buffalo | Elk River | Rogers | Wayzata | Zimmerman | ||
|---|---|---|---|---|---|---|---|
| N (%) | N (%) | p-value1 | |||||
| Sex | 0.12 | ||||||
| Male | 1066 (50.9) | 213 (48.4) | 174 (47.3) | 185 (55.2) | 412 (51.1) | 82 (56.6) | |
| Female | 1028 (49.1) | 227 (51.6) | 194 (52.7) | 150 (44.8) | 394 (48.9) | 63 (43.5) | |
| Race/Ethnicity (check all that apply) | |||||||
| White or Caucasian | 1802 (87.7) | 397 (92.5) | 332 (91.2) | 311 (94.5) | 621 (78.8) | 141 (96.6) | <.0001 |
| Black, African, or African-American | 118 (5.7) | 17 (4.0) | 17 (4.7) | 12 (3.7) | 71 (9.0) | 1 (0.7) | <.0001 |
| Hispanic or Latino/a | 73 (3.5) | 17 (3.9) | 14 (3.8) | 9 (2.7) | 29 (3.6) | 4 (2.7) | 0.87 |
| Asian | 180 (8.8) | 11 (2.6) | 14 (3.9) | 11 (3.3) | 143 (18.2) | 1 (0.7) | <.0001 |
| American Indian or Alaskan Native | 70 (3.4) | 20 (4.7) | 16 (4.4) | 10 (3.0) | 16 (2.0) | 8 (5.5) | 0.05 |
| Native Hawaiian or other Pacific Islander | 13 (0.6) | 2 (0.5) | 4 (1.1) | 3 (0.9) | 3 (0.4) | 1 (0.7) | 0.50 |
| Something else | 18 (0.9) | 14 (3.2) | 1 (0.3) | 0 (0.0) | 3 (0.4) | 0 (0.0) | <.0001 |
| Parent Education | <.0001 | ||||||
| Finished college | 1502 (79.5) | 259 (69.8) | 227 (72.3) | 239 (79.9) | 697 (90.5) | 81 (59.1) | |
| High school or some college | 388 (20.5) | 112 (30.2) | 87 (27.7) | 60 (20.1) | 73 (9.5) | 56 (40.9) | |
| Qualify for free/reduced lunch | <.0001 | ||||||
| Yes | 258 (12.8) | 74 (17.9) | 41 (12.4) | 36 (11.1) | 79 (9.9) | 28 (18.8) | |
| No | 1383 (68.6) | 249 (60.1) | 224 (67.9) | 203 (62.7) | 612 (76.7) | 95 (63.8) | |
| I don’t know | 374 (18.6) | 91 (22.0) | 65 (19.7) | 85 (26.2) | 107 (13.4) | 26 (17.5) | |
| Sleep duration (in hours) | 0.005 | ||||||
| < 6.0 | 190 (9.1) | 31 (7.2) | 30 (8.3) | 34 (10.1) | 75 (9.3) | 20 (13.7) | |
| 6.0–6.75 | 408 (19.6) | 58 (13.5) | 88 (24.2) | 64 (18.9) | 170 (21.0) | 28 (19.2) | |
| 7.0–7.75 | 582 (27.9) | 119 (27.7) | 102 (28.1) | 86 (25.4) | 236 (29.2) | 39 (26.7) | |
| 7.75–8.25 | 581 (27.9) | 140 (32.6) | 95 (26.2) | 92 (27.2) | 220 (27.2) | 35 (24.0) | |
| 8.5–10.0 | 323 (15.5) | 82 (19.1) | 48 (13.2) | 62 (18.3) | 107 (13.2) | 24 (16.4) | |
| Body-mass Index z-score: subjective | |||||||
| Overweight (>85th percentile) | 378 (21.8) | 93 (26.3) | 76 (27.3) | 58 (21.1) | 131 (18.5) | 20 (17.5) | 0.005 |
| Obese (>95th percentile) | 146 (8.4) | 37 (10.5) | 35 (12.6) | 23 (8.4) | 43 (6.1) | 8 (7.0) | 0.009 |
| Body-mass Index z-score: objective | |||||||
| Overweight (>85th percentile) | 431 (28.4) | 94 (30.9) | 109 (34.2) | 79 (27.8) | 115 (23.9) | 34 (26.4) | 0.02 |
| Obese (>95th percentile) | 188 (12.4) | 50 (16.5) | 42 (13.2) | 33 (11.6) | 45 (9.4) | 18 (14.0) | 0.05 |
1
Test of significance differences across schools (chi-square or Fisher exact tests)