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. 2020 Jul 20;10(7):e036919. doi: 10.1136/bmjopen-2020-036919

Figure 5.

Figure 5

Balance of surveillance cost versus savings from reductions in surgical site infection risk of 10%, 20% and 30% per surveillance period for baseline surgical site infection (SSI) risk of 10% or 15% using a variable surveillance strategy (continuous surveillance when the infection risk is above 10%, two quarters per year surveillance for infection risk between 5% and 10% and one quarter per year surveillance for infection risk below 5%). Model assumes that reductions in risk of infection are achieved in conjunction with improvement programmes during surveillance periods and maintained between each surveillance period. No further reductions in risk of infection were included once a postulated minimum SSI risk of 3% was reached.

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