I nvestigators from two Chicago tertiary care centers sought to identify the factors that parents of children in pediatric intensive care units (PICU) would consider important if they were to consider withdrawing life-sustaining therapies. English-or Spanishspeaking parents older than 17 years with a child in the PICU for one to seven days were eligible. Semi-structured interviews were conducted with each of the parents.Parents were asked five questions including if they could "imagine a situation when you would consider asking the doctors" to withdraw life support. Four questions assessed whether their decision would be influenced by patient suffering, quality of life, physician estimate of prognosis, or financial burden.Seventy-four (63%) of the 117 parents approached agreed to participate (69 children) and 70 had usable interviews. The majority of children were critically ill with 45% mechanically ventilated and 26% on vasoactive medications. More than half (57%) of parents said that they could imagine a situation in which they would consider withdrawal of life-sustaining therapies. Parents reported that suffering (64%), poor quality of life (51%), and physician's assessment of prognosis (43%) would influence their decision. Only 7% would be influenced by financial considerations. Qualitative analysis identified six additional influential themes in the decision-making process including faith (whether to help accept withdrawal or reject it), passage of time (withdrawal could only be considered after some indeterminate time had passed), mistrust of physicians, reliance on intuition or a sense that one would know what would be appropriate when the time came, and general rejection of withdrawal of life support. Almost all parents (96%) stated that the parents should be the primary decision-makers and 52% felt that physicians were also key participants.The authors conclude that parents and pediatricians share common considerations, such as suffering and quality of life, when making a decision about withdrawal of life support. However, parents describe additional factors, including faith, time, and intuition, that are not always considered by pediatricians.