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Fig. 1 | Critical Care

Fig. 1

From: Immortal time bias: a possible explanation for “Impact of acyclovir use on survival of patients with ventilator-associated pneumonia and high load herpes simplex virus replication”

Fig. 1

Potential immortal time bias in the current study. a Acyclovir treatment preceding HSV test, time is started at acyclovir treatment leading to an immortal time from start of treatment to HSV test. b HSV test preceding acyclovir treatment leading to excluded immortal time from the untreated group

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Critical Care

ISSN: 1364-8535