Assessment of the effectiveness of weight-adjusted antibiotic administration, for reduced duration, in surgical prophylaxis of primary hip and knee arthroplasty

Figure 1 Balance plot showing standardized mean differences in covariate values between the two regimes before (unadjusted) and after (adjusted) propensity score weighting. The vertical dashed lines represent the boundary of meaningful baseline bias.

Figure 2 Interrupted time series analysis for risk of overall infection. A: Original sample; B: Propensity score-weighted sample.