Table 1 The variables showed normal distribution in Japanese schoolchildren in 1999 and 2009 (n = 233)
From: Decline in objective physical activity over a 10-year period in a Japanese elementary school
1999 | 2009 | P value of two-way ANOVA | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Boys | Girls | Boys | Girls | |||||||||||||||||
Mean | (SD) | Median | (5th and 95th percentiles) | Mean | (SD) | Median | (5th and 95th percentiles) | Mean | (SD) | Median | (5th and 95th percentiles) | Mean | (SD) | Median | (5th and 95th percentiles) | Year | Sex | Y × S | ||
n = 62 | n = 63 | n = 56 | n = 52 | |||||||||||||||||
Physical characteristics | ||||||||||||||||||||
Height | cm | 145.8 | (6.5) | 145.1 | (136.5–157.5) | 147.1 | (6.6) | 148.0 | (135.1–157.1) | 147.8 | (7.6) | 148.4 | (134.6–161.5) | 150.1 | (6.0) | 149.8 | (141.6–160.5) | 0.005 | 0.044 | 0.615 |
Accelerometer output | ||||||||||||||||||||
PAL | 1.92 | (0.16) | 1.89 | (1.71–2.16) | 1.85 | (0.20) | 1.83 | (1.64–2.11) | 1.72 | (0.08) | 1.72 | (1.57–1.86) | 1.73 | (0.08) | 1.73 | (1.61–1.85) | <0.001 | 0.095 | 0.046 | |
Time spent performing specific activities | ||||||||||||||||||||
Walking to school | min | 41 | (24) | 38 | (9–93) | 46 | (27) | 40 | (5–98) | 35 | (20) | 34 | (5–70) | 39 | (22) | 40 | (8–73) | 0.043 | 0.202 | 0.954 |
Watching TV | min | 108 | (61) | 105 | (13–229) | 98 | (61) | 96 | (3–211) | 90 | (57) | 84 | (1–198) | 111 | (84) | 92 | (8–254) | 0.775 | 0.549 | 0.088 |
Sleeping | min | 515 | (48) | 523 | (427–583) | 502 | (42) | 510 | (427–570) | 500 | (41) | 503 | (421–568) | 490 | (50) | 498 | (392–574) | 0.029 | 0.069 | 0.790 |
Bedtime | h:m | 22:30 | (51') | 22:20 | (21:00–00:01) | 22:42 | (44') | 22:43 | (21:28–00:00) | 22:36 | (42') | 22:28 | (21:37-23:36) | 22:47 | (51') | 22:48 | (21:18–00:17) | 0.435 | 0.070 | 0.985 |