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Table 2 Percentage +/- standard errors (absolute counts of students by mode of transport/total students) of K-5th grade students transported to school by car, walking, or school bus.*, §

From: Pilot evaluation of a walking school bus program in a low-income, urban community

  Baseline 1-month 6-month 12-month
By car     
   Intervention 47 +/- 3
(132/281)
36 +/- 3
(106/291)
36 +/- 3
(116/323)
34 +/- 3
(102/303)
   Controls 41 +/- 3
(152/372)
38 +/- 2
(169/447)
41 +/- 2
(168/406)
39 +/- 3
(134/340)
By walking     
   Intervention 20 +/- 2
(56/281)
25 +/- 3
(73/291)
24 +/- 2
(79/323)
25 +/- 2
(75/303)
   Controls 15 +/- 2
(54/372)
11 +/- 2
(51/447)
11 +/- 2
(45/406)
7 +/- 1
(24/340)
By school bus     
   Intervention 31 +/- 3
(88/281)
36 +/- 3
(105/291)
37 +/- 3
(119/323)
39 +/- 3
(118/303)
   Controls 40 +/- 3
(149/372)
45 +/- 2
(200/447)
44 +/- 2
(177/406)
49 +/- 3
(165/340)
  1. * Unless otherwise indicated, differences were not significant using a Pearson Chi-squared test comparing intervention versus controls at the specified time point for each mode of transport. P-values were adjusted using the Ryan-Holm stepdown Bonferroni procedure.
  2. §Other forms of school transport (metro bus and bicycle) were excluded from the table due to low percentages.
  3. p = 0.0012 at 1-month, p = 0.0011 at 6-months, and p = 0.001 at 12-months for differences between intervention versus controls.