title: Simultaneous effects of noise exposure and smoking on OAEs.
abstract: Noise is one of the most pervasive hazardous factors in the workplace. Noise-induced hearing loss (NIHL) is the most common disorder related to noise exposure. Smoking is probably associated with hearing loss. The simultaneous effect of noise and smoking on hearing is a recent concern. In this study, we assessed the simultaneous effect of noise and smoking on standard pure tone audiometry (PTA) and distortion product otoacoustic emissions (DP-OAEs). This was an historical cohort study on 224 workers exposed to noise who were divided into two groups: Smokers and nonsmokers. DP-OAE response amplitudes were assessed. Data were analyzed by SPSS software (version 19) using Student's t-test and Mann-Whitney U test. One hundred and five subjects were smokers (case group) and 119 individuals were nonsmokers (control group). All the subjects were exposed to 91.08 + 2.29 dBA [time-weighted average (TWA) for an 8 h work shift]. Mean DP-OAE response amplitude at frequencies higher than 1,000 Hz was significantly higher in the smokers than the nonsmokers. This study showed that smoking can aggravate the effect of noise on hearing in DP-OAEs.
authors.forename: Amir Houshang
authors.initials: AH
authors.lastname: Mehrparvar
authors.forename: Abolfazl
authors.initials: A
authors.lastname: Mollasadeghi
authors.forename: Seyed Hesam
authors.initials: SH
authors.lastname: Hashemi
authors.forename: Mohammad Javad Zare
authors.initials: MJ
authors.lastname: Sakhvidi
authors.affiliation: Department of Occupational Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
authors.forename: Mehrdad
authors.initials: M
authors.lastname: Mostaghaci
authors.forename: Mohammad Hossein
authors.initials: MH
authors.lastname: Davari
mesh_terms: D000328:Adult; D001301:Audiometry, Pure-Tone; D003430:Cross-Sectional Studies; D005260:Female; D006317:Hearing Loss, Noise-Induced / Q000453:epidemiology / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D017084:Otoacoustic Emissions, Spontaneous / Q000502:physiology*; D038781:Otoscopy; D012907:Smoking / Q000453:epidemiology / Q000503:physiopathology*