Table 3:

Difference in monthly ambulance call rates between intervention and control buildings

ComparisonAmbulance call rates per 100 apartment units/mo*Control buildings, mean ± SD
Mean difference (95% CI)Intervention buildings, mean ± SD
Final analysis3.11 ± 1.303.99 ± 1.17−0.88 (−0.45 to −1.30)
Sensitivity analysis3.68 ± 1.104.01 ± 0.87−0.33 (−1.32 to 0.65)
  • Note: CI = confidence interval, SD = standard deviation.

  • * Adjusted for pairing and baseline ambulance call rates.

  • One pair of buildings with unreliable data were excluded.

  • Including all buildings that were randomly assigned initially.