title: A Prospective Population-based Study of Total Nasal Resistance in Korean Subjects.
abstract: OBJECTIVE
  Rhinomanometry is a widely accepted method for objective assessment of nasal patency. However, few studies have reported the values of otherwise healthy population for nasal resistance in East Asians. The purpose of this study was to measure normal total nasal resistance (TNR) values in a large sample of Korean adults and to reveal parameters contributing to TNR values.
  
  
  METHODS
  Subjects were enrolled from a cohort of the Korean Genome and Epidemiology Study. They were evaluated by anthropometry, questionnaire, and active anterior rhinomanometry at transnasal pressures of 100 and 150 Pascal (Pa).
  
  
  RESULTS
  The study sample consisted of 2,538 healthy subjects (1,298 women and 1,240 men) aged 20 to 80 years. Normal reference TNR values were 0.19±0.08 Pa/cm(3)/second at 100 Pa and 0.22±0.09 Pa/cm(3)/second at 150 Pa. The TNR of women was significantly higher than that of men (P<0.0001). TNR decreased with increasing age in both genders (P<0.05). In women, lower body weight was related to increasing TNR. In men, current smokers had higher TNR than ex-smokers and never smokers.
  
  
  CONCLUSIONS
  The results of the present study provide information regarding the values of otherwise healthy population of TNR and parameters associated with TNR in Korean adults.
authors.affiliation: Division of Pulmonary, Sleep and Critical Care Medicine, Department of Internal Medicine, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea.
authors.forename: Se Joong
authors.initials: SJ
authors.lastname: Kim
authors.forename: Ji Ho
authors.initials: JH
authors.lastname: Choi
authors.forename: Eun Joong
authors.initials: EJ
authors.lastname: Kim
authors.forename: Seung Ku
authors.initials: SK
authors.lastname: Lee
authors.forename: Seung Hoon
authors.initials: SH
authors.lastname: Lee
authors.forename: Young Joon
authors.initials: YJ
authors.lastname: Jun
authors.forename: Je Hyeong
authors.initials: JH
authors.lastname: Kim
authors.forename: Soichiro
authors.initials: S
authors.lastname: Miyazaki
authors.forename: Chol
authors.initials: C
authors.lastname: Shin