Table 3:

Difference in monthly ambulance call rates between intervention and control buildings

Comparison	Ambulance call rates per 100 apartment units/mo*		Control buildings, mean ± SD
	Mean difference (95% CI)	Intervention buildings, mean ± SD
Final analysis†	3.11 ± 1.30	3.99 ± 1.17	−0.88 (−0.45 to −1.30)
Sensitivity analysis‡	3.68 ± 1.10	4.01 ± 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.