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Table 4 Combined clustered negative binomial regressions* between playground attribute and number of persons by renovation status

From: Features and amenities of school playgrounds: A direct observation study of utilization and physical activity levels outside of school time

  Utilization, IRRs (95% CI)
  Renovated (N = 100) Unrenovated (N = 100)
Playground Attributes Adults Girls Boys Adults Girls Boys
Total # of play features 1.07 (1.06, 1.07) 1.07 (1.06, 1.08) 1.02 (1.00, 1.03) -- -- --
Overall cleanliness -- 0.29 (0.15, 0.54) 0.27 (0.13, 0.56) -- -- 1.56 (.52, 4.64)
Overall quality -- -- -- -- 0.26 (0.02, 4.58) --
Overall safety -- -- -- -- -- 2.77 (1.05, 7.32)
Presence of benches -- -- -- -- 0.82 (0.06, 11.22) --
Presence of trash cans -- -- -- -- -- 2.02 (0.88, 4.63)
Coverage/shade for resting features 1.44 (1.29, 1.61) -- 2.03 (1.40, 2.92) -- -- --
  1. Significant results (p <.05) represented in bold.
  2. *Additionally adjusted for the significant playground attributes, a count of parks within a .75 mile network distance of schoolyards, the population of children 17 and under in the census tract of the school, and the enrollment in the school.
  3. IRR = Incident Rate Ratio. CI = Confidence Interval.