title: [Optimal time interval for position change for ICU patients using foam mattress against pressure ulcer risk].
abstract: OBJECTIVE
  This study was done to identify the time interval to pressure ulcer and to determine the optimal time interval for position change depending on pressure ulcer risk in patients using foam mattress in intensive care units.
  
  
  METHODS
  The Braden scale score, occurrence of pressure ulcers and position change intervals were assessed with 56 patients admitted to an intensive care unit from April to November, 2011. The time to pressure ulcer occurrence by Braden scale risk group was analyzed with Kaplan-Meier survival analysis and log rank test. Then, the optimal time interval for position change was calculated with ROC curve.
  
  
  RESULTS
  The median time to pressure ulcer occurrence was 5 hours at mild or moderate risk, 3.5 hours at high risk and 3 hours at very high risk on the Braden scale. The optimal time interval for position change was 3 hours at mild and moderate risk, 2 hours at high and very high risk of Braden scale.
  
  
  CONCLUSIONS
  When foam mattresses are used a slight extension of the time interval for position change can be considered for the patients with mild or moderate pressure ulcer risk but not for patients with high or very high pressure ulcer risk by Braden scale.
authors.affiliation: Pusan National University Yangsan Hospital, Yangsan, Republic of Korea.
authors.forename: Hyean Jeong
authors.initials: HJ
authors.lastname: Kim
authors.forename: In Sook
authors.initials: IS
authors.lastname: Jeong
mesh_terms: D000328:Adult; D000368:Aged; D001513:Beds; D015992:Body Mass Index; D005260:Female; D006801:Humans; D007362:Intensive Care Units; D053208:Kaplan-Meier Estimate; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D009730:Nursing Assessment; D003668:Pressure Ulcer / Q000453:epidemiology* / Q000401:mortality; D012372:ROC Curve; D012307:Risk Factors; D013997:Time Factors