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. 2021 Apr 8;49(10):e1037–e1039. doi: 10.1097/CCM.0000000000005044

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Figure 1. — Impact of visitor policy on critically ill patients. A, Regression discontinuity (RD) plot of daily averages for ICU length of stay (LOS) over a 12-mo period. B, RD plot of ICU LOS with crossover patients (n = 33) excluded. Solid lines are linear regression lines, and dashed lines represent 95% CIs. C, Plot depicting the RD estimates for ICU LOS, with crossover patients (n = 33) excluded while varying the cutoff in 30-d intervals. The true policy date, March 21, 2020, corresponds to a value of 202. Cutoffs that reached statistical significance (p < 0.05) are highlighted in orange.