http://stroke.ahajournals.org/content/48/3/808?etoc=
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Introduction
The
manner in which information is presented can profoundly affect the
interpretation of that information and, consequently, any action taken.
As an illustrative example, let us assume that swimming pools across the
country have to report the time it takes to rescue a child who is
drowning. As a parent, would you be satisfied if the median time to
rescue a drowning child was 30 seconds? Knowing that a lifeguard could
reach your child in only half a minute may be comforting. However, this
comfort likely would not last if you were then informed that the 90th
percentile is 6 minutes, a time which is likely life-threatening. We
argue here that acute ischemic stroke treatment faces a similar
reporting issue and that we should be doing more to acknowledge and
improve the 90th percentile for stroke patients.
We
recommend that investigators report interval times with the 90th
percentile, in addition to median and interquartile range, in their
primary results on paper and at presentation. In the long run, this
change would allow us to focus on ensuring that the majority of patients
are treated within an acceptable time frame, rather than only 50% of
patients. Additionally, efforts tailored to improving the 90th
percentile would result in improved systems of care and stroke outcomes.
Based on data from recent endovascular trials, it is absolutely clear that when it comes to stroke treatment, time is brain.1–5 The longer the time from onset to reperfusion, the lower the likelihood of good outcome.6 The effect of time delay is even more pronounced when one considers onset to randomization times in endovascular trials.1–5
This is not because of physiological factors; rather, it is the result
of these trials overtly selecting patients based on favorable imaging.(cherry picking)
In all of …
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