Table 3.

Estimated effect of implementation of QBPs on outcomes from the segmented regression analysis. Calculated as counterfactual difference from the difference (95% Confidence Intervals) between the actual rate post-implementation and the predicted rate had QBP not been implemented

	Estimate (95% CI)
Mean wait time (in hours) from ED/hospital admission to surgery
Hip fractures	- 0.46 (-3.94, 3.03)
Ankle fractures	1.46 (-3.58, 6.50)
Tibial plateau fractures	-3.22 (-39.39, 32.95)
Appendectomy	0.33 (-0.57, 1.24)
Percentage (%) of surgeries performed after hoursa
Hip fractures	-0.90 (-3.91, 2.11)
Ankle fractures	-3.54 (-11.25, 4.16)
Tibial plateau fractures	7.09 (-7.97, 22.14)
Appendectomy	1.07 (-2.45, 4.59)

^aAfter hours = evening or overnight (between the hours of 1700 – 0700, any day)