Table 2. Inequity in physical activity levels (steps/day) on school days (Monday-Friday) and weekend days (Saturday, Sunday, holidays) by grade 5 students attending APPLE Schools and comparison schools over a two-year interval (2009–2011) of a Comprehensive School Health intervention.
| 2009 | 2011 | Intervention Effect (a2–a1)—(c2–c1) | 95% CI a | Relative Change b | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| APPLE Schools (a1) | Comparison schools (c1) | Difference (a1—c1) | 95% CI a | Relative Difference (a1-c1)/a1 x100 | APPLE Schools(a2) | Comparison schools (c2) | Difference(a1–c1) | 95% CI a | Relative Difference (a2-c2)/a2 x100 | ||||
| SCHOOL DAYS | |||||||||||||
| Overall c | 11531 | 12699 | -1168 | -1998;-338 | -10.1 | 13683 | 13630 | 53 | -831; 936 | +0.4 | 1221 | 306;2135 | +10.5 |
| Weight Status c | |||||||||||||
| Overweight/obese | 10803 | 12449 | -1646 | -2798;-493 | -15.2 | 13169 | 13580 | -411 | -920;1741 | -3.1 | 1235 | -372;2842 | +12.1 |
| Normal weight | 11926 | 12831 | -905 | -1873;62 | -7.6 | 13929 | 13614 | 315 | -710;1341 | +2.3 | 1221 | 92;2350 | +9.9 |
| Income d | |||||||||||||
| <$50,000 | 11371 | 12729 | -1358 | -3203;488 | -11.9 | 13646 | 12535 | 1111 | -1111;3335 | +8.1 | 2469 | 42;4897 | +20.1 |
| $50,001-$100,000 | 11335 | 12463 | -1128 | -2314;58 | -10.0 | 13159 | 13658 | -499 | -1947;949 | -3.8 | 629 | -1243;2500 | +6.2 |
| >$100,000 | 11439 | 13046 | -1607 | -3113;-102 | -14.1 | 13482 | 13537 | -55 | -1470;1359 | -0.4 | 1552 | -315;3420 | +13.6 |
| Education d | |||||||||||||
| <Secondary | 10953 | 12763 | -1810 | -3312;-307 | -16.5 | 13759 | 13169 | 590 | -1135;2316 | +4.3 | 2400 | 515;4285 | +20.8 |
| College | 11524 | 12448 | -924 | -2080;231 | -8.0 | 13400 | 14235 | -835 | -2023;354 | -6.2 | 90 | -1388;1568 | +1.8 |
| University/graduate | 11463 | 13051 | -1588 | 2816;-360 | -13.9 | 13618 | 13347 | 271 | -1070;1612 | +2.0 | 1859 | 285;3433 | +15.8 |
| WEEKEND DAYS | |||||||||||||
| Overall c | 9212 | 11186 | -1974 | -2938;-1009 | -21.4 | 12148 | 12121 | 27 | -1004;1059 | +0.2 | 2001 | 600; 3402 | +21.6 |
| Weight Status c | |||||||||||||
| Overweight/obese | 8935 | 10638 | -1703 | -3282;-126 | -19.1 | 11404 | 10954 | 450 | -1375;2275 | +3.9 | 2153 | -247;4553 | +23.0 |
| Normal weight | 9336 | 11332 | -1996 | -3203;-790 | -21.4 | 12792 | 12540 | 252 | -1011;1515 | +2.0 | 2248 | 516;3980 | +23.4 |
| Income d | |||||||||||||
| <$50,000 | 8510 | 10140 | -1630 | -3967;708 | -19.2 | 12002 | 9997 | 2005 | -936;4945 | +16.7 | 3635 | 136;7133 | +35.9 |
| $50,001-$100,000 | 9366 | 11288 | -1922 | -3893;49 | -20.5 | 12229 | 12929 | -700 | -3089;1688 | -5.7 | 1221 | -1652;4094 | +14.8 |
| >$100,000 | 10039 | 12474 | -2435 | -4764;-107 | -24.3 | 11020 | 12256 | -1236 | -3361;887 | -11.2 | 1199 | -1952;4349 | +13.0 |
| Education d | |||||||||||||
| <Secondary | 7796 | 10644 | -2848 | -4546;-1150 | -36.5 | 12139 | 11658 | 481 | -1546;2509 | +4.0 | 3329 | 694;5965 | +40.5 |
| College | 9986 | 11573 | -1587 | -3240;67 | -15.9 | 10778 | 12857 | -2079 | -3802;-356 | -19.3 | -493 | -2880;1894 | -3.4 |
| University/graduate | 9059 | 11189 | -2129 | -3872;-387 | -23.5 | 13555 | 11725 | 1829 | -63;3721 | +13.5 | 3959 | 1478;6439 | +37.0 |
a; CI = Confidence interval
b: |relative difference in 2009|+Relative difference in 2011
c:adjustments for potential confounders included: gender, parental education, and household income
d: adjustments for potential confounders included: gender
Note: bolded 95% CI indicate statistical significance at p<0.05.