Epidemiología y factores de riesgo para microtia en Colombia

Clinical profiling of pediatric microtia patients: A cross-sectional analysis at a leading pediatric hospital in Ecuador (2015-2022)

BACKGROUND

Microtia is a frequent congenital deformity of the pinna, often with hearing loss. This study reviews the clinical profiles of microtia pediatric patients treated at a referral hospital in Quito, Ecuador, from 2015 to 2022.

METHODS

A cross-sectional descriptive study was carried out based on the analysis of medical records of pediatric patients with microtia treated between January 2015 and December 2022 at the Hospital Pediátrico Baca Ortiz in Quito, Ecuador. Descriptive statistics were used, and the Chi-square test assessed associations between categorical variables.

RESULTS

Of the 235 patients evaluated, 59.6% were male, 83.4% lived at high altitudes (2500-3500 m), and 19.1% had a family history of microtia. Grade III microtia was diagnosed in 63.8%, predominantly on the right side. Nearly all (99.1%) had hearing loss. Other anatomical alterations were observed in 27.7%, primarily the preauricular appendage. Bone vibrator implantation was a common treatment for 24.3%. Altitude did not show a significant correlation with microtia characteristics.

CONCLUSIONS

Most patients had grade III microtia with associated hearing loss. Despite the high prevalence at elevated altitudes, no significant altitude-disease correlation was found. The study highlights the need for further research on microtia in regions like Ecuador.

[Identification of barriers in medical care service for children eith congenital defects detected in the AIVA program]

Objective

To identify the barriers in health care in patients with visual and auditory congenital defects (CD) treated through the Comprehensive Care Program for Families with Orphan Diseases with Visual and/or Auditory Compromise (AIVA), in Bogotá D. C., Colombia.

Materials and Methods

Cross-sectional study carried out in 58 children diagnosed with CD with possible visual or auditory compromise. The study population was selected from the AIVA program database, and to obtain the data, parents or legal representatives were asked to take the children for an initial medical evaluation and answer an interview. The barriers were classified according to Tanahashi's effective coverage model and the data were analyzed using descriptive statistics; absolute and relative frequencies were calculated for the qualitative variables, and means and standard deviations or medians and interquartile ranges (according to the distribution of the data determined with the Shapiro-Wilk test) for the quantitative variables.

Results

81.03% of parents or legal representatives expressed at least one barrier, the most frequent being availability (49.38%), followed by accessibility (32.24%), acceptability (11.83%) and contact (6.53%).

Conclusion

The majority of parents or legal representatives interviewed reported barriers to accessing health services. Given that these have a negative impact on the health of children with CI, joint interventions are required to reduce them and thus guarantee better health conditions in children with CI and auditory or visual impairment.

Description and results of birth defects surveillance and follow-up programs in Bogotá and Cali, Colombia, 2002-2019

Birth defects are structural or functional defects present at birth and are caused by different factors that affect intrauterine development. They are the second most common cause of death under five years of age in Latin America and the Caribbean. In Bogotá and Cali, Colombia, there are two surveillance programs established to evaluate the prevalence of them. The purpose of the following article is to describe the experience and results of the surveillance of the Birth Defects Surveillance Programs in Bogotá and Cali, Colombia, 2002-2019. The information was taken from the surveillance programs that have an active hospital system in some institutions of the city (ECLAMC modality), and use data from the passive national system (Sistema Nacional de Vigilancia en Salud Pública - SIVIGILA) to expand their coverage. From 2002 until 2019, 1,289.650 births have been monitored through one of the surveillance programs, including both methodologies. The importance of surveillance programs relies on the amount of data obtained that allows the development of research, the detection of potential changes throughout time, and the guidance of public policies to improve promotion and prevention strategies.

Risk factors associated with congenital defects that alter hearing or vision in children born in the city of Bogotá between 2002 and 2016

INTRODUCTION

Congenital defects affecting the auditory and visual capacity of newborns represent a public health problem as they result in substantial disability, directly impacting the quality of life of newborns and their families.

OBJECTIVE

To evaluate risk factors associated with congenital defects that alter hearing or vision in newborns in the city of Bogotá between 2002 and 2016.

METHOD

Data from the Bogotá Birth Defects Surveillance and Follow-up Program was used, which consolidated data regarding 167 ECLAMC study (Estudio Colaborativo Latino Americano de Malformaciones Congénitas, in spanish) variables in a case-control design to identify risk factors for birth defects after parents provided signed informed consent. Cases were defined as any newborn (alive or stillborn) with a weight greater than 500 g with any visual or hearing abnormality. Controls were defined as newborn in the same hospital and month with no birth defects. Groups were formed according to the case presentation as follows: isolated eye anomaly, isolated ear anomaly, polymalformative, syndromic, and teratogenic.

RESULTS

In total, 402,657 births were reviewed, of which 968 cases had some congenital defects that alter hearing or vision. An association was found between the presence of defects and prematurity, as well as between syndromic cases and increasing maternal age. When comparing cases and controls with the risk of having a birth defect, multiparity had an odds ratio (OR) of 1.47 (95% CI: 1.27-1.71), acute respiratory infection had an OR of 2.41 (95% CI: 1.04-5.58), low maternal education level had an OR of 1.34 (95% CI:1.10-1.62), low paternal education had an OR of 1.42, (95% CI:1.17-1.73), manual labor in the maternal occupation had an OR of 1.31 (95% CI:1.03-1.67), and a history of congenital anomalies in the family had an OR of 1.55 (95% CI:1.19-2.00).

CONCLUSION

This research allowed the identification of epidemiological data and significant risk factors for congenital defects that alter hearing or vision in the population of Bogotá.

[Microtia-atresia: clinical, genetic and genomic aspects]

Mexico has a prevalence of microtia of 7.37/10,000 (newborns), 3 times higher than the prevalence reported in other populations (USA 2-3/10,000). Microtia is defined as a congenital malformation of the external ear characterized by a small auricular lobe with an abnormal shape. It is more often unilateral and on the right side. Males are more frequently affected than females. It can occur as an isolated defect or can be associated with other abnormalities such as stenosis of the external auditory canal. In three of the main pediatric hospitals in Mexico, microtia is among the most important causes of attendance in the Genetics Department. Microtia-atresia must be considered as a major malformation with important repercussions in hearing function requiring multidisciplinary medical care in order to limit the disability associated and to provide genetic counseling. Its etiology is complex. Only in a minor number of cases it has been possible to identify a main genetic component (as in monogenic presentations) or a main environmental cause (as in fetal alcohol syndrome or pregestational diabetes). In most cases this malformation is multifactorial. Due to the relevance that the frequency of microtia atresia has in different health services in Mexico, it is important that all medical professionals are aware of its clinical, molecular and inherited characteristics.

Transient evoked oto-acoustic emission screening in newborns in Bogotá, Colombia: a retrospective study

OBJECTIVE

The aim of this study was to investigate the characteristics and performance of transient evoked oto-acoustic emission (TEOAE) hearing screening in newborns in Colombia, and analyze all possible variables and factors affecting the results.

MATERIALS AND METHODS

An observational, descriptive and retrospective study with bivariate analysis was performed. The study population consisted of 56,822 newborns evaluated at the private institution, PREGEN. TEOAE testing was carried out as a pediatric hearing screening test from December 2003 to March 2012. The database from PREGEN was revised, and the protocol for evaluation included the same screening test performed twice. Demographic characteristics were recorded and the newborn's background was evaluated. Basic statistics of the qualitative and quantitative variables, and statistical analysis were obtained using the chi-square test.

RESULTS

Of the 56,822 records examined, 0.28% were classed as abnormal, which corresponded to a prevalence of 1 in 350. In the screened newborns, 0.08% had a major abnormality or other clinical condition diagnosed, and 0.29% reported a family history of hearing loss. A prevalence of 6.7 in 10,000 was obtained for microtia, which is similar to the 6.4 in 10,000 previously reported in Colombia (database of the Latin-American Collaborative Study of Congenital Malformations - ECLAMC). Statistical analysis demonstrated an association between presenting with a major anomaly and a higher frequency of abnormal results on both TEOAE tests.

CONCLUSIONS

Newborns in Colombia do not currently undergo screening for the early detection of hearing impairment. The results from this study suggest TEOAE screening tests, when performed twice, are able to detect hearing abnormalities in newborns. This highlights the need to improve the long-term evaluation and monitoring of patients in Colombia through diagnostic tests, and to provide tests that are both sensitive and specific. Furthermore, the use of TEOAE screening is justified by the favorable cost: benefit ratio demonstrated in many countries worldwide.

Microtia in the Netherlands: clinical characteristics and associated anomalies

BACKGROUND

In Europe there have been few detailed reports on the clinical characteristics of microtia patient populations. The objective of the present study is to contribute to our insight of microtia in Europe by examining the Dutch microtia population treated in the University Medical Center Utrecht (UMCU) with regards to its clinical features and associated anomalies. In addition, an overview of the literature is provided for thorough comparison.

METHODS

A retrospective chart review was performed for all microtia patients referred to the UMCU for reconstructive surgery of the auricle over the period 1990-2012. Previous studies were identified by a systematic search of the electronic literature databases PubMed and Embase. In a subsequent meta-analysis the results from the literature review were pooled by geographical region to facilitate comparison.

RESULTS

A total of 204 microtia patients were referred for reconstructive surgery during 1990-2012. This group was characterized by a male predominance of 60.8%. Unilateral disease was observed in 91.7% of patients, affecting the right auricle in 66.3%. In unilateral patients lobule type microtia was seen in 59.9%, (small) concha type in 34.4% and anotia in 5.7%. The more frequent anomalies associated with microtia were atresia of the acoustic meatus (76.0%), preauricular skin tags (30.5%), hemifacial microsomia (27.5%), facial nerve paralysis (8.3%) and congenital heart disease (2.5%). Familial occurrence of microtia was reported for 2.0% of UMCU patients and for 10.0% of patients in the literature.

CONCLUSION

The clinical characteristics of microtia in the Netherlands correspond to those reported for other patient populations in the literature. Most congenital anomalies associated with microtia in Dutch patients belong to the Oculo-Auriculo-Vertebral Spectrum. The considerable degree of familial microtia observed in the literature points to a substantial genetic component in the etiology of the condition.

Impact and risk factors of craniofacial malformations in a Colombian population

OBJECTIVE

Craniofacial malformations comprise diverse diagnoses, implying a wide range of morbidity and disability among populations. Our aim was to study them as a group and describe their epidemiological factors inside a population as well as finding common risk factors for their presentation in Colombia.

METHODS

We conducted a case-control study in several Colombian hospitals participating in the ECLAMC (Spanish acronym for Latin-American Collaborative Study of Congenital Malformations) program. For the analysis we included 374 cases of isolated malformations and 728 controls, out of 44,701 births.

RESULTS

A rate of 83.67 cases per 10,000 births was found for craniofacial malformations as a group, with an overall sex ratio of 1. We found predominance for their presentation on the right side. As main associations we obtained a positive family history of another craniofacial malformation (OR: 3.10 CI 95% [2.24-4.30]), particularly preauricular tags (OR 52.36 CI 95% [12.62-217.16]), preauricular pits (OR: 36.35 CI 95% [4.82-274.27]) and cleft lip with or without palate (OR: 2.50 CI 95% [1.07-5.84]). Medication use during pregnancy was also linked to malformations (OR: 2.00 CI 95% [1.38-2.89]). Specific agents such as ferrous sulfate (OR: 1.46 CI 95% [1.13-1.89]), folic acid (OR: 1.35 CI 95% [1.02-1.79]) and nifedipine (OR: 2.88 CI 95% [1.22-6.79]) also showed a significant correlation. Maternal alcohol use was also identified as a possible risk factor (OR: 2.45 CI 95% [1.39-4.29]).

CONCLUSIONS

Craniofacial malformations are frequently encountered among the group of congenital defects. When they present in an isolated fashion, familial history is an important risk factor, although some prenatal factors such as alcohol and some medications may have influence over their prevalence.