Follow-up default in a hospital-based universal
newborn hearing screening programme in a
low-income country
B. O. Olusanya*
Unit of Audiological Medicine/Centre for International Child Health, Institute of Child Health, London, UK
Accepted for publication 21 October 2008
Keywords
early detection, follow-up
compliance, health
intervention, hearing loss,
parental education
Correspondence:
Bolajoko O. Olusanya,
Unit of Audiological
Medicine/Centre for
International Child
Health, Institute of Child
Health and Great
Ormond Street Hospital
for Children NHS Trust, 30
Guilford Street, London
WC1N 1EH, UK
E-mail:
boolusanya@aol.com or
b.olusanya@ich.ucl.ac.uk
*Present address:
Consultant
Developmental
Paediatrician, Maternal
and Child Health Unit,
Department of
Community Health and
Primary Care, College of
Medicine, University of
Lagos, Idi-araba, Surulere,
Nigeria
Abstract
Background Effective early detection of infants with permanent hearing impairment requires
parental compliance with various stages of a screening protocol. However, many infants who failed
initial screening tests are often not presented for follow-up evaluation, thus compromising
prospects for early detection and intervention. This study set out to determine maternal and infant
factors associated with loss to follow-up in a hospital-based universal hearing screening
programme in a low-income country.
Methods A cross-sectional study in which babies in a tertiary maternity hospital were enrolled into
a two-stage hearing screening programme with transient-evoked otoacoustic emissions followed
by automated auditory brainstem response (AABR) for all transient-evoked otoacoustic emissions
referrals before hospital discharge. Diagnostic evaluation was scheduled for AABR referrals on
outpatient basis. Correlates of non-compliance were determined through multivariable logistic
regression analyses of relevant maternal and infant factors.
Results Some 1330 babies participated in the first-stage screening and of 551 scheduled for AABR;
56 (10.2%) did not complete. Some 37 (84.1%) of the 44 AABR referrals did not complete the
diagnostic evaluation.There were no significant differences between the profile of those who did
not complete either the second-stage screening or diagnostic evaluation and those who completed
across virtually all socio-demographic factors except that Christian mothers were significantly more
likely not to complete the second-stage screening than diagnostic evaluation compared with their
Muslim counterparts (odds ratio: 3.01; 95% confidence intervals: 1.17–7.87). The only independent
predictors of non-compliance with pre-discharge screening were delivery by spontaneous vertex
(odds ratio: 2.76; 95% confidence intervals: 1.47–5.19) and admission into special care baby unit
(odds ratio: 5.62; 95% confidence intervals: 2.92–10.84) while no factor was predictive of
non-compliance with diagnostic evaluation.
Conclusions Mode of delivery or having high-risk baby influences compliance before hospital
discharge while factors other than maternal or infant socio-demographic/medical profile such as
unfavourable cultural beliefs and stigma may be key determinants of follow-up compliance after
discharge.
Child:
care, health and development
Original Article doi:10.1111/j.1365-2214.2008.00923.x
© 2009 The Author
Journal compilation © 2009 Blackwell Publishing Ltd 190