Is 72-hour survival in adults with out-of-hospital cardiac arrest greater with initial endotracheal intubation or laryngeal tube insertion?

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Why is this study important?

The large Pragmatic Airway Resuscitation Trial (PART) compared the most commonly used prehospital supraglottic airway (SGA) in the United States, the laryngeal tube (LT), to endotracheal intubation (ETI) in out-of-hospital cardiac arrest (OHCA). ETI may be a definitive airway, but interruptions in compressions to allow insertion may affect outcomes. SGAs can be inserted quickly, with minimal training and without pauses in compressions, but whether it results in similar outcomes was unknown.

Which, if any, threats to validity are most likely to have an impact on the results and how?

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