Neonatal hearing screening of newborns of mothers with Diabetic Mellitus and/or hypertension in pregnancy: a systematic literature review

Development of a Risk-Factor Questionnaire for the Infant Ear and Hearing Program in Samoa

PURPOSE

Congenital hearing loss is the most common sensory disorder present at birth. While universal newborn hearing screening is the standard for most high-income countries, alternative models are under consideration for most low and middle-income countries. The Pacific Islands have among the highest rates of paediatric ear disease and deafness in the world, and an interim Infant Ear and Hearing Program is currently being developed for the Polynesian nation of Samoa. The inclusion of a routine risk-factor questionnaire for childhood deafness in the Infant Ear and Hearing Program package is a feasible alternative for well-baby clinics in Samoa.

DESCRIPTION

The World Health Organisation advocates that all member states should implement newborn and infant hearing screening. This includes a risk-factor questionnaire developed from the joint committee on infant hearing risk-factors, as well as additional risk-factors unique to low and middle income countries. The present paper examines all known risk-factors for childhood deafness to develop an appropriate and evidence-based questionnaire for inclusion in the Samoan Child Health Book and Infant Ear and Hearing Program package.

ASSESSMENT

From a starting point of 19 risk-factors, 11 risk-factors were included with no changes; 5 risk-factors were modified to align with current health service availability in Samoa; 2 risk-factors were excluded due to cultural inappropriateness and irrelevance for Samoa; and 1 risk-factor was added for our Samoan and Pacific Island context.

CONCLUSION

There are 17 items on the final risk-factor questionnaire for childhood deafness developed for Samoa. The Infant Ear and Hearing Program package will also include ear examinations and monitoring of hearing developmental milestones. The risk-factor questionnaire will be reviewed again in 5 years' time for the next edition of the Samoan Child Health Book.

Neonatal Hearing Screening: Prevalence of Unilateral and Bilateral Hearing Loss and Associated Risk Factors

INTRODUCTION

Newborn hearing screening is essential for early identification of hearing loss to decrease the adverse effects of hearing loss. The objective of this study was to determine the prevalence of hearing loss and risk factors of congenital hearing loss in newborns.

METHODS

In this analytical case-control study, a hearing screening test was performed for all newborns aged 3-14 days.

RESULTS

Of 5,500 newborns evaluated, 24 newborns had hearing loss. The prevalence of hearing loss was 4.36 per 1,000. Of 24 hearing-impaired newborns, 15 had bilateral hearing loss (BHL) (62.5%) and nine had unilateral hearing loss (UHL) (37.5%). Among the neonates with hearing loss, the prevalence of hearing loss was higher (77.8%) in the right ear. The main risk factors identified in this study were low gestational age (P=0.001), hospitalization in the neonatal intensive care unit (NICU) (P=0.008), exposure to ototoxic drugs (P=0.001), gestational diabetes P=0.01), craniofacial anomalies (P=0.01), convulsion (P=0.03), consanguineous marriage of parents (P=0.001), low birth weight (P=0.01), and hyperbilirubinemia (P=0.001).

CONCLUSION

The prevalence of hearing loss was higher in the right ear than in the left ear. NICU stay, use of ototoxic drugs, low gestational age (<35 weeks), gestational diabetes, craniofacial anomalies, convulsion, consanguineous marriage of parents, low birth weight, and hyperbilirubinemia were significant risk factors for congenital hearing loss in studied newborns.