Table 2.
Range (n) of measured values within each quintile of inactivity, MVPA and VPA for 6-day accelerometry and self-report.
| Quintile | |||||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | |
| Accelerometry (minutes/day) | |||||
| Inactivity | |||||
| 6th Grade | 282.5–406.6 (191) | 406.7–441.2 (190) | 441.3–473.4 (190) | 473.6–517.7 (190) | 518.6–696.8 (190) |
| 8th Grade | 309.9–460.0 (191) | 461.0–493.7 (190) | 493.8–525.0 (190) | 525.2–562.9 (190) | 563.0–752.1 (190) |
| MVPA | |||||
| 6th Grade | 2.6–13.9 (191) | 13.9–18.8 (190) | 18.8–24.2 (190) | 24.3–31.6 (190) | 31.6–87.8 (190) |
| 8th Grade | 2.0–13.2 (191) | 13.2–17.4 (190) | 17.5–22.2 (190) | 22.2–29.4 (190) | 29.4–76.3 (190) |
| VPA | |||||
| 6th Grade | 0.2–2.4 (191) | 2.4–3.6 (190) | 3.6–5.1 (190) | 5.2–8.0 (190) | 8.0–49.6 (190) |
| 8th Grade | 0.3–2.3 (191) | 2.3–3.4 (190) | 3.4–4.6 (190) | 4.6–7.3 (190) | 7.3–31.0 (190) |
| Self-report (30-min. blocks/day) | |||||
| Inactivity | |||||
| 6th Grade | 12.7–26.0 (201) | 26.3–28.3 (207) | 28.7–30.0 (192) | 30.3–31.3 (161) | 31.7–36.0 (190) |
| 8th Grade | 16.3–26.3 (198) | 26.7–28.3 (183) | 28.7–30.0 (210) | 30.3–31.7 (205) | 32.0–36.0 (155) |
| MVPA | |||||
| 6th Grade | 0.0–0.0 (201) | 0.3–0.7 (187) | 1.0–1.7 (204) | 2.0–3.0 (174) | 3.3–15.0 (185) |
| 8th Grade | 0.0–0.0 (317) | 0.3–0.7 (152) | 1.0–1.3 (126) | 1.7–2.7 (176) | 3.0–15.3 (180) |
| VPA | |||||
| 6th Grade | 0.0–0.0 (284) | 0.3–0.7 (233) | 1.0–1.0 (69) | 1.3–2.0 (184) | 2.3–12.3 (181) |
| 8th Grade* | 0.0–0.0* (421) | 0.3–0.7 (183) | 1.0–1.7 (168) | 2.0–12.3 (179) | |
*
Quintiles 1 and 2 combined due to 44% of girls reporting zero blocks of VPA at 8th grade