title: Laryngeal aerodynamic analysis in assisting with the diagnosis of muscle tension dysphonia.
abstract: OBJECTIVE
  To estimate the aerodynamic multiparameters for patients with muscular tension dysphonia (MTD) and evaluate voice aerodynamic analysis for assisting the diagnosis of this disorder.
  
  
  METHODS
  A prospective study.
  
  
  METHODS
  Voice aerodynamic parameters, including subglottal pressure (SGP) level, glottal resistance (GR), mean airflow rate (MFR), and maximum phonation time (MPT), for 26 MTD patients and 27 normal adults were analyzed using receiver operating characteristics (ROC) analysis and multivariate logistic regression.
  
  
  RESULTS
  For male samples, MTD patients had higher SGP (P=0.001), higher GR (P=0.012), lower MFR (P=0.042), and shorter MPT (P=0.027), whereas for female samples, the difference between cases and controls was statistically significant only in SGP (P<0.001) and MPT (P<0.001). ROC analysis showed that the threshold of 8.175 cm H(2)O for SGP achieved a good classification for MTD, with an adequate sensitivity (76.9%) and the perfect specificity (100%). Finally, multivariate logistic regression established a credible model (with SGP and MPT as the predictors) for classifying MTD, with a 92.5% percentage correct.
  
  
  CONCLUSIONS
  This analysis indicates that aerodynamics evaluation could help the diagnosis of MTD patients, jointly with medical history scrutiny, physical examination, fibrolaryngoscopy, and/or videoendostroboscopy.
authors.affiliation: Department of Otorhinolaryngology/Head and Neck Surgery, Second Affiliated Hospital (Sun Yat-Sen Memorial Hospital), Sun Yat-Sen University, Guangzhou, China. yiqingzheng@hotmail.com
authors.forename: Yi-Qing
authors.initials: YQ
authors.lastname: Zheng
authors.forename: Bi-Ru
authors.initials: BR
authors.lastname: Zhang
authors.forename: Wei-Yang
authors.initials: WY
authors.lastname: Su
authors.forename: Jian
authors.initials: J
authors.lastname: Gong
authors.forename: Man-Qiong
authors.initials: MQ
authors.lastname: Yuan
authors.forename: Yuan-Lin
authors.initials: YL
authors.lastname: Ding
authors.forename: Shao-Qi
authors.initials: SQ
authors.lastname: Rao
mesh_terms: D000293:Adolescent; D000328:Adult; D016022:Case-Control Studies; D055154:Dysphonia / Q000175:diagnosis* / Q000503:physiopathology; D005260:Female; D006801:Humans; D007830:Larynx / Q000503:physiopathology*; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D009129:Muscle Tonus; D012372:ROC Curve; D013061:Speech Acoustics; D055815:Young Adult