Table 2

Descriptive statistics for steps/day indicators of HUB City Steps participants, Mississippi, 2010
Mean Median SD Min Max
Full dataset (n=27,903 individual steps/day)
 Mean steps/day 7268 6918 3984 511 30628
 Met 7,500 steps/daya 40.1 39.0 29.5 0.0 98.5
 Met 10,000 steps/daya 26.3 16.9 27.2 0.0 97.0
 6-category SD-PA (n, %)
 Basal (<2,500 steps) 11 4.6
 Limited (2,500-4,999 steps) 61 25.5
 Low active (5,000-7,499 steps) 69 28.9
 Somewhat active (7,500-9,999 steps) 54 22.6
 Active (10,000-12,499 steps) 29 12.1
 Highly active (≥12,500 steps) 15 6.3
 Change in mean steps/dayb 2013 1205 3257 −7640 17819
 Change in median steps/dayb 2102 1386 3668 −8656 23730
 Change in 6-category SD-PAb 0.7 0.0 1.10 −3 4
 Change in 4-category SD-PAb 0.5 0.0 0.96 −3 3
Truncated dataset (n=27,903 individual steps/day)
 Mean steps/day 7221 6914 3721 743 24575
 Met 7,500 steps/daya 40.1 39.0 29.5 0.0 98.5
 Met 10,000 steps/daya 26.3 16.9 27.2 0.0 97.0
 Change in mean steps/dayb 1950 1205 3001 −7427 13481
 Change in median steps/dayb 2093 1386 3596 −8464 21422
 Change in 6-category SD-PAb 0.7 0.0 1.09 −3 4
 Change in 4-category SD-PAb 0.5 0.0 0.95 −3 3
Excluded dataset (n=27,132 individual steps/day)
 Mean steps/day 7279 6972 3417 1276 20637
 Met 7,500 steps/daya 40.8 40.1 29.5 0.0 98.5
 Met 10,000 steps/daya 26.6 17.3 27.3 0.0 97.0
 Change in mean steps/dayb 1855 1257 2710 −5931 13237
 Change in median steps/dayb 1954 1344 3084 −5040 15906
 Change in 6-category SD-PAb 0.7 1.0 1.02 −2 4
 Change in 4-category SD-PAb 0.6 0.0 0.92 −2 3

SD, standard deviation; Min, minimum; Max, maximum; SD-PA, step-defined physical activity.

a Percentage of values which met at least 7,500 or 10,000 steps/day.

b Change between intervention weeks 1 and 2 and remaining intervention weeks (3–27).

Positive change indicates an increase during intervention.

Thomson et al.

Thomson et al. BMC Public Health 2012 12:983   doi:10.1186/1471-2458-12-983

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