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Table 3 Summary of practitioner feedback-based factor refinement of each survey

From: Development of a factorial survey for use in an international study examining clinicians’ likelihood to support the decision to initiate invasive long-term ventilation for a child (the TechChild study)

Survey Number of factors Level of factors Vignette population
Infant 8 3x2x2x3x2x2x3x3 1296
Adolescent 9 3x2x2x2x2x3x2x3x3 2592