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Hearing loss and ear disorders in Malaysian school children

Elango S, Purohit GN, Hashim M, Hilmi R

Int J Pediatr Otorhinolaryngol, 1991 Jul;22(1):75-80.
PMID: 1917340

In Malaysia 1,307 randomly selected primary school children were screened to find out the prevalence of hearing loss and middle ear disorders. Seventy-six students (5.81%) failed the screening audiometric test. There were 95 students (7.26%) with middle ear disorders. History of ear discharge was absent in 24 out of 57 cases with CSOM (42.11%) (P less than 0.001). Forty-three out of 95 children having middle ear disorders passed the screening audiometric test (P less than 0.01 Fisher exact test). Screening audiometric test fails to detect about 46% of cases with middle ear disorders. Screening audiometric test and otological examination if conducted by the school health medical officers regularly will be able to detect almost all the cases with hearing loss and middle ear disorders.

Matched MeSH terms: Hearing Disorders/epidemiology*
Hearing screening of infants in Neonatal Unit, Hospital Universiti Sains Malaysia using transient evoked otoacoustic emissions

Khairi MD, Din S, Shahid H, Normastura AR

J Laryngol Otol, 2005 Sep;119(9):678-83.
PMID: 16156907

The objective of this prospective study was to report on the prevalence of hearing impairment in the neonatal unit population. From 15 February 2000 to 15 March 2000 and from 15 February 2001 to 15 May 2001, 401 neonates were screened using transient evoked otoacoustic emissions (TEOAE) followed by second-stage screening of those infants who failed the initial test. Eight (2 per cent) infants failed one ear and 23 (5.74 per cent) infants failed both ears, adding up to 7.74 per cent planned for second-stage screening. Five out of 22 infants who came for the follow up failed the screening, resulting in a prevalence of hearing impairment of 1 per cent (95 per cent confidence interval [95% CI]: 0.0-2.0). Craniofacial malformations, very low birth weight, ototoxic medication, stigmata/syndromes associated with hearing loss and hyperbilirubinaemia at the level of exchange tranfusion were identified to be independent significant risk factors for hearing impairment, while poor Apgar scores and mechanical ventilation of more than five days were not. In conclusion, hearing screening in high-risk neonates revealed a total of 1 per cent with hearing loss. The changes in the risk profile indicate improved perinatal handling in a neonatal population at risk for hearing disorders.

Matched MeSH terms: Hearing Disorders/epidemiology*
Multiplicative effect of smoking and age on hearing impairment

Noorhassim I, Rampal KG

Am J Otolaryngol, 1998 8 6;19(4):240-3.
PMID: 9692632

PURPOSE: To determine the combined effect of smoking and age on hearing impairment.
MATERIALS AND METHODS: Pure tone audiometry test was conducted on 263 residents of a rural village who were not exposed to noise. The pack-years of smoking were computed from the subjects' smoking history. The association between pack-years and hearing impairment was assessed. The combined effect of smoking and age on hearing impairment was determined based on prevalence rate ratio.
RESULTS: There was a statistically significant trend in the number of pack-years of smoking and age as risk factors for hearing impairment. The prevalence rates of hearing impairment for nonsmokers aged 40 years and younger, smokers aged 40 years and younger, nonsmokers older than 40 years of age, and smokers older than 40 years of age were 6.9%, 11.9%, 29.7%, and 51.3%, respectively. The prevalence rate ratio for nonsmokers aged 40 years and younger, smokers aged 40 years and younger, nonsmokers older than 40 years of age, and smokers older than 40 years of age (nonsmokers aged 40 years and younger as a reference group) was 1, 1.7, 4.3, and 7.5, respectively. The prevalence rate ratios showed a multiplicative effect of smoking and age on hearing impairment.
CONCLUSION: Age and smoking are risk factors for hearing impairment. It is clear that smoking and age have multiplicative adverse effects on hearing impairment.

Matched MeSH terms: Hearing Disorders/epidemiology
Fulltext Prevalence of hearing loss and hearing impairment among rural males in Selangor, 1993. [Prevalens kurang pendengaran dan gangguan pendengaran penduduk lelaki luarbandar Selangor, 1993]

Noor Hassim I, Rampal KG

Med J Malaysia, 1994 Mar;49(1):78-85.
PMID: 8057996

A cross sectional study to determine the prevalence of hearing loss and hearing impairment was conducted on 286 male subjects from a rural area. The sample was chosen by using a simple random sampling method. Prevalence of symptoms of tinnitus, ear disease, ear drum perforation and infection of external auditory meatus was 19.0 per cent, 6.7 per cent, 3.5 per cent and 0.4 per cent respectively. Air conduction audiometry tests showed the prevalences of hearing impairment of the left, right and both ears (aged 15-30 years) were 5.9%, 8.8% and 0% respectively. The prevalence of hearing loss increased with age. The higher frequencies (> 4KHz) appeared to be more affected than the lower frequencies.

Matched MeSH terms: Hearing Disorders/epidemiology*
Effects of background noise on recording of portable transient-evoked otoacoustic emission in newborn hearing screening

Salina H, Abdullah A, Mukari SZ, Azmi MT

Eur Arch Otorhinolaryngol, 2010 Apr;267(4):495-9.
PMID: 19727788 DOI: 10.1007/s00405-009-1080-y

Transient-evoked otoacoustic emission (TEOAE) is a well-established screening tool for universal newborn hearing screening. The aims of this study are to measure the effects of background noise on recording of TEOAE and the duration required to complete the test at various noise levels. This study is a prospective study from June 2006 until May 2007. The study population were newborns from postnatal wards who were delivered at term pregnancy. Newborns who were more than 8-h old and passed a hearing screening testing using screening auditory brainstem response (SABRe) were further tested with TEOAE in four different test environments [isolation room in the ward during non-peak hour (E1), isolation room in the ward during peak hour (E2), maternal bedside in the ward during non-peak hour (E3) and maternal bedside in the ward during peak hour (E4)]. This study showed that test environment significantly influenced the time required to complete testing in both ears with F [534.23] = 0.945; P < 0.001 on the right ear and F [636.54] = 0.954; P < 0.001 on the left. Our study revealed that TEOAE testing was efficient in defining the presence of normal hearing in our postnatal wards at maternal bedside during non-peak hour with a specificity of 96.8%. Our study concludes that background noise levels for acceptable and accurate TEOAE recording in newborns should not exceed 65 dB A. In addition, when using TEOAE assessment in noisy environments, the time taken to obtain accurate results will greatly increase.

Matched MeSH terms: Hearing Disorders/epidemiology*
Anxiety of the mothers with referred baby during Universal Newborn Hearing Screening

Mohd Khairi MD, Rafidah KN, Affizal A, Normastura AR, Suzana M, Normani ZM

Int J Pediatr Otorhinolaryngol, 2011 Apr;75(4):513-7.
PMID: 21292333 DOI: 10.1016/j.ijporl.2011.01.009

To investigate the anxiety among mothers whom their babies have failed test results in the first stage of Universal Neonatal Hearing Screening Program.

Matched MeSH terms: Hearing Disorders/epidemiology