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. 2021 Dec 10;161(5):1167–1179. doi: 10.1016/j.chest.2021.11.035

Table 6.

Effect of Year on Annual Rate of Antibiotic Use per Person

Year Rate SE z Ratio P Value
PPY 0.612 0.089 2.31 .02
PY 0.366 0.062 ... ...

PPY = prepandemic year; PY = pandemic year.