|
Grade 6
|
Grade 7
|
Grade 8
|
---|
Mean
|
SE
|
Mean
|
SE
|
Mean
|
SE
|
---|
Average
|
7650a
|
368
|
6467
|
309
|
6014
|
371
|
Control
|
6811
|
388
|
6517
|
327
|
5921
|
396
|
Treatment
|
8489b
|
374
|
6418
|
315
|
6107
|
376
|
- Note. Least-squared means are predicted population marginal means adjusted for unbalanced cell sizes with standard errors adjusted for model covariance parameters. Superscript a indicates a significant mean difference between grade 6 and grades 7 and 8 participants (P < 0.05). Superscript b indicates a significant difference in the mean number of steps compared to the control condition (P < 0.01)