Difference in EMS call rates for intervention and control buildings (main trial results)
| Intervention buildings mean (SD) | Control buildings mean (SD) | Mean difference (95% CI) | |
| Baseline: unadjusted monthly EMS calls per 100 units | 4.13 (2.79) | 4.60 (2.80) | −0.47 (−1.12 to 0.18) |
| After 1 year: unadjusted monthly EMS calls per 100 units | 3.67 (2.75) | 4.79 (2.93) | −1.12 (−1.78 to 0.46) |
| Unadjusted: monthly mean difference | −0.47 (3.83) | 0.19 (3.57) | −0.65 (−1.51 to 0.20) |
| Adjusted:* monthly mean difference | – | – | −0.90 (−1.54 to −0.26)† |
Expected annual decrease in 911 calls: 10.8 calls/100 apartment units/year.
n=26 buildings (13 pairs of intervention and control buildings).
*Adjusted for building pairing and preintervention baseline.
†p<0.006.