title: Total nasal resistance among Sasang constitutional types: a population-based study in Korea.
abstract: BACKGROUND
  There have been many attempts to find an objective phenotype by Sasang constitutional types (SCTs) on an anatomical, physiological, and psychological basis, but there has been no research on total nasal resistance (TNR) among SCTs.
  
  
  METHODS
  We assessed the value of the TNR in the SCTs classified by an integrated diagnostic model. Included in the study were 1,346 individuals (701 males, 645 females) who participated in the Korean Genome and Epidemiology Study (KoGES). The TNR was measured by active anterior rhinomanometry (AAR) at transnasal pressures of 100 and 150 Pascal (Pa).
  
  
  RESULTS
  The average TNR was 0.186 ± 0.004 Pa/cm3/second at 100 Pa in the Tae-eum (TE), 0.193 ± 0.007 in the So-eum (SE), and 0.208 ± 0.005 in the So-yang (SY) types. Under condition of 150 Pa the TE type had a TNR value of 0.217 ± 0.004, the SE type was 0.230 ± 0.008, and the SY type was 0.243 ± 0.005. Higher values of TNR were more likely to be reported in the SY type at 100 Pa and 150 Pa. In the stratified analysis by sex, the SY type in males and females tended to have higher TNR value than the TE and SE types at transnasal pressure of both 100 Pa and 150 Pa.
  
  
  CONCLUSIONS
  These results provide new approaches to understand the functional characteristics among the SCTs in terms of nasal physiology. Further studies are required to clarify contributing factors for such a difference.
authors.forename: Dae Wui
authors.initials: DW
authors.lastname: Yoon
authors.forename: Seung Ku
authors.initials: SK
authors.lastname: Lee
authors.forename: Hyeryeon
authors.initials: H
authors.lastname: Yi
authors.forename: Jeong Hwa
authors.initials: JH
authors.lastname: Hong
authors.forename: Miyazaki
authors.initials: M
authors.lastname: Soichiro
authors.forename: Si Woo
authors.initials: SW
authors.lastname: Lee
authors.forename: Jong Yeol
authors.initials: JY
authors.lastname: Kim
authors.affiliation: Institute of Human Genomic Study, College of Medicine, Korea University Ansan Hospital, Ansan, Republic of Korea. chol-shin@korea.ac.kr.
authors.forename: Chol
authors.initials: C
authors.lastname: Shin
mesh_terms: D000328:Adult; D000368:Aged; D044466:Asian People / Q000235:genetics; D060467:Disease Resistance; D005260:Female; D006801:Humans; D008297:Male; D055670:Medicine, Korean Traditional; D008875:Middle Aged; D009666:Nose / Q000737:chemistry* / Q000276:immunology; D009668:Nose Diseases / Q000276:immunology*; D010641:Phenotype; D011159:Population Surveillance; D011312:Pressure; D056910:Republic of Korea; D025363:Rhinomanometry