title: Mechanism of pajama material on stratum corneum water content under mild cold conditions: explored by hierarchical linear regression.
abstract: OBJECTIVE
  The aim of this study was to explore the effect of fabric material worn during nocturnal sleep on stratum corneum water content (SCWC) under mild cold conditions.
  
  
  METHODS
  A controlled cross-over study has been designed to investigate systematically the effects of two kinds of pajama materials, cotton and polyester, on SCWC. Factors such as pajama fabric material, subjective perception and sleep quality were examined. Hierarchical linear regression was applied to assess the association between the factors and SCWC.
  
  
  RESULTS
  Fabric material and subjective perception of coldness significantly predicted SCWC in the wear trial. Polyester fabric had a negative effect on SCWC compared with cotton, and subjective perception of coldness also had a negative effect on SCWC.
  
  
  CONCLUSIONS
  The mechanisms by which pajama fabrics affect the SCWC could be due to the different thermal/hygroscopicity properties of the polyester and cotton fabric and the integral involvement of physiological and neurophysiological processes.
authors: Institute of Textiles & Clothing, The Hong Kong Polytechnic University, Hong Kong, China.
authors: Lei
authors: L
authors: Yao
authors: Hiromi
authors: H
authors: Tokura
authors: Yi
authors: Y
authors: Li
authors: Edwards
authors: E
authors: Newton
authors: Mayur Danny I
authors: MD
authors: Gohel
authors: Waiyee J
authors: WJ
authors: Chung
mesh_terms: D000328:Adult; D001833:Body Temperature Regulation; D003020:Clothing; D003080:Cold Temperature; D032561:Cotton Fiber; D004817:Epidermis / Q000378:metabolism*; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D008954:Models, Biological; D010465:Perception; D011091:Polyesters; D011140:Polyurethanes; D014867:Water / Q000378:metabolism*
chemical_list: D011091:Polyesters; D011140:Polyurethanes; D014867:Water