Place of birth and characteristics of infants with congenital and early-onset hearing loss in a developing country

Olusanya, Bolajoko O.; Somefun, Abayomi O.

doi:10.1016/j.ijporl.2009.05.018

Cited by 11 publications

(11 citation statements)

References 21 publications

(22 reference statements)

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“…Hyperbilirubinemia is more prevalent in African countries due to a higher incidence of glucose-6-phosphate dehydrogenase deficiency and lack of adequate medical treatment [13,23,24]. The Berlin and colleagues [17] study also reported a high prevalence for asphyxia-related risks including anoxia (17%), respiratory distress (15%) and artificial ventilation (23%).…”

Section: Discussionmentioning

confidence: 99%

“…Alongside such unique risk factors is a higher incidence of existing risk factors (e.g. birth trauma, asphyxia, neonatal jaundice, ototoxicity) associated with poor maternal and child health services typical of many developing world regions [10,11,13,14]. The prevalence of ANSD has been reported to be as high as 16% in a population of Nigerian children with sensorineural hearing loss (SNHL) born outside hospital as opposed to a prevalence of 10% in a similar group born within hospital [10].…”

Section: Introductionmentioning

confidence: 99%

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Childhood hearing loss and risk profile in a South African population

Swanepoel

Johl

Pienaar

2013

International Journal of Pediatric Otorhinolaryngology

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Objective: To describe the nature of hearing loss and associated risk profile in a representative South African population of infants and children diagnosed at a pediatric referral clinic. Methods:A retrospective review of patient files for a pediatric auditory evoked potential clinic in Pretoria was conducted (January 2007 to December 2011).Collected data included demographical information, risk factors from case history questionnaire, diagnosis (type and degree of hearing loss), documented age of caregiver suspicion and age of first diagnosis. Results:Hearing loss was present in 73% (73/100) of cases evaluated. Permanent hearing losses (SNHL, ANSD & Mixed) constituted 76% of losses. Unilateral hearing losses constituted 8% of SNHL and 20% of conductive hearing loss. ANSD was diagnosed in 21.4% and SNHL in 78.6% of permanent non-conductive hearing loss cases. The most prevalent SNHL risk was family history of hearing loss and for ANSD it was admittance to the NICU for more than 5 days. The majority of the sample was diagnosed with a permanent bilateral SNHL and ANSD after 36 months of age (47%) despite 40% already suspected of having a hearing loss before 12 months of age. Conclusions:A high prevalence of ANSD was found with preventable risk factors often indicated. Age of diagnosis was significantly delayed, evidencing the lack of early hearing detection services in South Africa. The majority of children were diagnosed at ages precluding optimal benefits from early detection and subsequent intervention.3

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Childhood hearing loss and risk profile in a South African population

Swanepoel

Johl

Pienaar

2013

International Journal of Pediatric Otorhinolaryngology

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“…For example, while the prevalence of AN/AD varies widely across studies, rates of up to 15% have been reported among infants with permanent hearing loss or less than 1% among ''at risk'' population in developed countries [20]. Data from developing countries are sparse, but in one study from Turkey 10 (15.3%) of the 65 infants confirmed with hearing loss had AN/AD [21] compared with 11 (13.3%) of the 83 infants confirmed with hearing loss in Nigeria [22]. Other potential contributors to false-negatives based on evidence from the literature include progressive or delayed-onset hearing loss possibly from asymptomatic cytomegalovirus (CMV) as well as acquired hearing loss following the use of ototoxic drugs after TEOAE screening [23,24].…”

Section: Comparison With Other Studies and Implications For Practicementioning

confidence: 99%

Is discordance in TEOAE and AABR outcomes predictable in newborns?

Olusanya¹,

Bamigboye²

2010

International Journal of Pediatric Otorhinolaryngology

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“…eafness is a global problem that is most serious in the developing world, with 7 per 1000 children in Nigeria born with deafness (Olusanya and Somefun, 2009) and 5.5 per 1000 live births in South Africa (Swanepoel et al, 2009). These incidences are about five times higher than observed in the United States and Europe (Mehra et al, 2009;Parving, 1999).…”

mentioning

confidence: 99%