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NATIONAL CONFERENCE ON STUDENTS’ MEDICAL RESEARCH (2008)

11-12 April 2008,  Medical College, Thiruvananthapuram

 

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DETERMINANTS OF HEARING LOSS
Doris George Yohannan*, Farisha OV, Gayathri MG
Govt. Medical College, Thiruvananthapuram

BACKGROUND

Hearing loss is the impairment of hearing and its severity may vary from mild to severe or profound. Hearing loss is one of the most common sensory disorders in humans and can present at any age. Nearly 10% of the adult population has some hearing loss, and one-third of individuals over the age of 65 have a hearing loss of sufficient magnitude to require a hearing aid. It is a disorder, which causes considerable morbidity to the patient and will affect his role in the society.

OBJECTIVES

To find out the determinants of hearing loss in a study population of 40 cases coming to the PTA room and 80 controls in Ophthalmology OPD, Regional Institute of ophthalmology Surgery ward, Ortho ward, Medical College Hospital, Thiruvananthapuram

MATERIALS AND METHODS

Design of study: Case control study. Study Setting: PTA room, Surgery ward, Ortho ward, Medical College Hospital & Ophthalmology OPD, Regional Institute of Ophthalmology, Thiruvananthapuram. Study group: Cases: 40 out patients with hearing loss of more than 20 dB in any of the audible frequencies as assessed by PTA. Controls: 80 outpatients without hearing loss. Data collection :Interview method.

RESULTS AND CONCLUSION

By analysing the data we found that some of the factors taken into consideration had a statistically significant association (p<0.05) with hearing loss. They are

Noise exposure (2 = 0.044)
Ear Infection (2 = 0.004)
Surgery in ear (2 = 0.00)
Trauma to ear (2 = 0.00)
Ototxic drug intake (2 = 0.001)

Factors that had an Odds ratio above 1 are

Noise exposure (3.083)
Ear Infection (3.769)
Trauma to ear (5.938)
Other diseases (1.485)
Recurrent attacks of cold (1.353)
Family history (1.216)
Recurrent attacks of URI (1.406)
Vascular diseases (1.417)
Maternal age >35 at the time of birth (2.053)

By doing logistic regression the following factors were found to be significant risk factor.
Ear Infection (p =0.001) and Trauma to ear (p =0.000).

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