Vera A. Essuman

Prof. Vera A. Essuman

University of Ghana, Accra, Greater Accra, Ghana
orcid

Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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5 August 2020 in BMJ Open
Verified
Journal Article
Open access
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IBImoro Zeba Braimah
Imoro Zeba Braimah
CEChristabel Enweronu-Laryea
Christabel Enweronu-Laryea
ASAdziri Harold Sackey
Adziri Harold Sackey
EKErnest Kenu
Ernest Kenu
KAKofi Agyabeng
Kofi Agyabeng
VEVera A. Essuman
Vera A. Essuman
Objective To determine the incidence of retinopathy of prematurity (ROP) and any associated risk factors among preterm infants at the Neonatal Intensive Care Unit (NICU) of Korle-Bu Teaching Hospital (KBTH). Design Prospective study. Setting Level 3 NICU of KBTH from June 2018 to February 2019. Participants Eligible infants with birth weight (BW) less than 2 kg or gestational age (GA) less than 37 weeks were examined at scheduled intervals until full maturity of their retina. Outcome measures The primary outcome measure was cumulative incidence of ROP and secondary outcome measure was risk factors associated with ROP. Results Of the 401 infants, 222 were females (55.4%), mean±SD GA was 32.3±2.4 weeks (median 32, IQR 31 to 34) and mean BW 1.6±0.4 kg (median 1.5, IQR 1.3 to 1.9). The cumulative incidence of ROP was 13.7% (95% CI: 10.5 to 17.5%), with 1.8% (seven infants) having type 1 ROP. Increased risk of ROP was observed in babies with supplemental oxygen exposure (p<0.001), BW less than 1.5 kg (p=0.019), confirmed neonatal sepsis (p=0.001), nasogastric tube feeding (p=0.03) and poor pupillary dilation (0.032). A reduced risk of ROP was observed in boys (p=0.004) and after delivery by caesarean section (p=0.019). Conclusion The rates of ROP at KBTH are comparable to other NICUs in sub-Saharan Africa. Birth weight less than 1.5 kg, confirmed neonatal sepsis, nasogastric tube feeding and poor pupil dilation were independently associated with increased incidence of ROP. ROP screening should be a part of the routine service for premature infants in Ghana.

15 April 2022 in Ophthalmology
Verified
Journal Article
Open access
ATAnkit Singh Tomar
Ankit Singh Tomar
PFPaul T Finger
Paul T Finger
BGBrenda Gallie
Brenda Gallie
TKTero T. Kivelä
Tero T. Kivelä
AMAshwin Mallipatna
Ashwin Mallipatna
ECElisa Carreras
Elisa Carreras
To determine the value of clinical features for advanced intraocular retinoblastoma as defined by the eighth edition of the American Joint Committee on Cancer (AJCC) cT3 category and AJCC Ophthalmic Oncology Task Force (OOTF) Size Groups to predict the high-risk pathologic features. International, multicenter, registry-based retrospective case series. Eighteen ophthalmic oncology centers from 13 countries over 6 continents shared evaluations of 942 eyes enucleated as primary treatment for AJCC cT3 and, for comparison, cT2 retinoblastoma. International, multicenter, registry-based data were pooled from patients enrolled between 2001 and 2013. High-risk pathologic features were defined as AJCC categories pT3 and pT4. In addition, AJCC OOTF Size Groups were defined as follows: (1) less than half, (2) more than half but less than two thirds, (3) more than two thirds of globe volume involved, and (4) diffuse infiltrating retinoblastoma. Statistical risk of high-risk pathologic features corresponding to AJCC cT3 subcategories and AJCC OOTF Size Groups. Of 942 retinoblastoma eyes treated by primary enucleation, 282 (30%) showed high-risk pathologic features. Both cT subcategories and AJCC OOTF Size Groups (P < 0.001 for both) were associated with high-risk pathologic features. On logistic regression analysis, cT3c (iris neovascularization with glaucoma), cT3d (intraocular hemorrhage), and cT3e (aseptic orbital cellulitis) were predictive factors for high-risk pathologic features when compared with cT2a with an odds ratio of 2.3 (P = 0.002), 2.5 (P = 0.002), and 3.3 (P = 0.019), respectively. Size Group 3 (more than two-thirds globe volume) and 4 (diffuse infiltrative retinoblastoma) were the best predictive factors with an odds ratio of 3.3 and 4.1 (P < 0.001 for both), respectively, for high-risk pathologic features when compared with Size Groups 1 (i.e., < 50% of globe volume). The AJCC retinoblastoma staging clinical cT3c–e subcategories (glaucoma, intraocular hemorrhage, and aseptic orbital cellulitis, respectively) as well as the AJCC OOTF Size Groups 3 (tumor more than two thirds of globe volume) and 4 (diffuse infiltrative retinoblastoma) both allowed stratification of clinical risk factors that can be used to predict the presence of high-risk pathologic features and thus facilitate treatment decisions.

30 April 2022 in Ophthalmology
Verified
Journal Article
Open access
ATAnkit Singh Tomar
Ankit Singh Tomar
PFPaul T Finger
Paul T Finger
BGBrenda Gallie
Brenda Gallie
TKTero T. Kivelä
Tero T. Kivelä
AMAshwin Mallipatna
Ashwin Mallipatna
ECElisa Carreras
Elisa Carreras
To evaluate presenting features, tumor size, and treatment methods for risk of metastatic death due to advanced intraocular retinoblastoma (RB). International, multicenter, registry-based retrospective case series. A total of 1841 patients with advanced RB. Advanced RB was defined by 8th edition American Joint Committee on Cancer (AJCC) categories cT2 and cT3 and new AJCC-Ophthalmic Oncology Task Force (OOTF) Size Groups (1: < 50% of globe volume, 2: > 50% but < 2/3, 3: > 2/3, and 4: diffuse infiltrating RB). Treatments were primary enucleation, systemic chemotherapy with secondary enucleation, and systemic chemotherapy with eye salvage. Metastatic death. The 5-year Kaplan–Meier cumulative survival estimates by patient-level AJCC clinical subcategories were 98% for cT2a, 96% for cT2b, 88% for cT3a, 95% for cT3b, 92% for cT3c, 84% for cT3d, and 75% for cT3e RB. Survival estimates by treatment modality were 96% for primary enucleation, 89% for systemic chemotherapy and secondary enucleation, and 90% for systemic chemotherapy with eye salvage. Risk of metastatic mortality increased with increasing cT subcategory (P < 0.001). Cox proportional hazards regression analysis confirmed a higher risk of metastatic mortality in categories cT3c (glaucoma, hazard ratio [HR], 4.9; P = 0.011), cT3d (intraocular hemorrhage, HR, 14.0; P < 0.001), and cT3e (orbital cellulitis, HR, 19.6; P < 0.001) than in category cT2a and with systemic chemotherapy with secondary enucleation (HR, 3.3; P < 0.001) and eye salvage (HR, 4.9; P < 0.001) than with primary enucleation. The 5-year Kaplan–Meier cumulative survival estimates by AJCC-OOTF Size Groups 1 to 4 were 99%, 96%, 94%, and 83%, respectively. Mortality from metastatic RB increased with increasing Size Group (P < 0.001). Cox proportional hazards regression analysis revealed that patients with Size Group 3 (HR, 10.0; P = 0.002) and 4 (HR, 41.1; P < 0.001) had a greater risk of metastatic mortality than Size Group 1. The AJCC-RB cT2 and cT3 subcategories and size-based AJCC-OOTF Groups 3 (> 2/3 globe volume) and 4 (diffuse infiltrating RB) provided a robust stratification of clinical risk for metastatic death in advanced intraocular RB. Primary enucleation offered the highest survival rates for patients with advanced intraocular RB.

6 January 2021 in JMIR Research Protocols
Verified
Journal Article
Open access
VEVera A. Essuman
Vera A. Essuman
NTNaa Naamuah Tagoe
Naa Naamuah Tagoe
JAJosephine Akpalu
Josephine Akpalu
AEAkye Essuman
Akye Essuman
ASAdziri H Sackey
Adziri H Sackey
Winfried AmoakuWinfried Amoaku
Winfried Amoaku
Background: Diabetes is associated with premature morbidity and mortality from its many complications. There are limited data on the chronic complications of diabetes in children and adolescents in sub-Saharan Africa. Objective: The study aims to determine the (1) burden and related factors of chronic systemic complications of diabetes, including diabetic and nondiabetic ocular conditions in children and adolescents, and (2) quality of life (QoL) of participants compared to healthy controls. This manuscript describes the study methodology. Methods: Demographic information, medical history, anthropometric measurements, and laboratory characteristics were collected, and the participants were screened for microvascular and macrovascular complications as well as nondiabetic ocular disease. QoL questionnaires were administered to participants, their caregivers, and controls. Participants were followed up annually up to 3 years to determine the natural history of and trends in these conditions. SPSS Version 25.0 will be used for data analysis. Continuous and categorical data will be presented as mean (SD) and as percentages (%), respectively. t tests and analysis of variance will be used to compare means, and chi-square tests will be used to compare categorical data. Correlation, regression, and logistic regression analyses will be employed to establish linear associations and causal associations as appropriate. Relative risk and odds ratios will be used to estimate risk. QoL outcomes in Ghanaian children and adolescents with diabetes mellitus compared with caregivers and healthy controls will be assessed using the Pediatric Quality of Life inventory. Significance will be set at α=.05. Results: Institutional approval from the Ethical and Protocol Review Committee of the University of Ghana Medical School was received on August 22, 2014 (Protocol Identification Number: MS-Et/M.12-P4.5/2013-2014). Funding for the project was received from the University of Ghana Research Fund (#UGRF/9/LMG-013/2015-2016) in March 2016. Patient recruitment, clinical examination, and data collection commenced in August 2016 and was completed in September 2019. A total of 58 children and adolescents with diabetes mellitus have been recruited. Blood samples were stored at –80 °C for analysis, which was completed at the end of July 2020. Data analysis is ongoing and will be completed by the end of December 2020. Investigators plan to submit the results for publication by the end of February 2021. Conclusions: The prevalence, natural history, trends in diabetic complications and nondiabetic ocular disease, and QoL will be provided. Our data may inform policies and interventions to improve care given to children and adolescents with diabetes. International Registered Report Identifier (IRRID): DERR1-10.2196/21440

VEVera A. Essuman
Vera A. Essuman
NTNaa N. Tagoe
Naa N. Tagoe
AEAkye Essuman
Akye Essuman
BABENJAMIN ABAIDOO
BENJAMIN ABAIDOO
JAJosephine Akpalu
Josephine Akpalu
Winfried AmoakuWinfried Amoaku
Winfried Amoaku
Background: The main objective of the study was to determine the prevalence of diabetic retinopathy (DR), other diabetes-related ocular changes (e.g., cataracts, corneal ulceration), and non-diabetic ocular disease in Ghanaian children and adolescents. The second objective was to evaluate the relationship between these conditions and age at diagnosis, current age, diabetes mellitus (DM) duration, and participant’s sex. Methods: A cross-sectional study, undertaken by a multidisciplinary team, included a cohort of children and adolescents (4–19 years) with DM recruited from selected health facilities in Ghana, from March 2016 to September 2019, after written informed consent or assent. The cohort will be followed up for 3 years to determine the natural course of the ocular changes, reported later. Participants were examined for all microvascular and macrovascular complications, non-diabetic ocular disease, anthropometric measurements, laboratory characteristics and quality of life issues. Full ocular examination was also undertaken. Statistical Package for Social Sciences (SPSS Version 25.0) was used for the data analysis. Continuous and categorical variables were presented as mean and standard deviation (SD), median (interquartile range) and as percentages (%), respectively. T-test and Mann–Whitney U test were used in establishing associations. Results: A total of 58 participants were recruited. DR was detected in only 1 out of 58 (1.7%) participants at baseline. Cataracts were the most common ocular finding, detected in 42 (72%) at baseline. Other anterior segment changes observed included blepharitis 46 (79.3%) and tear film instability 38 (65.5%). There was a significant positive association between duration of the DM and the risk of cataract (p = 0.027). Participants’ age at diagnosis was significantly associated with the presence of prominent corneal nerves (p = 0.004). Conclusions: DR was uncommon in this cohort of young persons with DM in Ghana. Cataracts, blepharitis and refractive errors were ocular changes commonly observed. All young persons with diabetes should undergo regular eye examination in all clinics where follow-up care is provided.

29 February 2024 in JFO Open Ophthalmology
Verified
Journal Article
Open access
VEVera A. Essuman
Vera A. Essuman
BABENJAMIN ABAIDOO
BENJAMIN ABAIDOO
KAKwesi Amissah-Arthur
Kwesi Amissah-Arthur
VBV.M Beyuo
V.M Beyuo
ANA. Nimako
A. Nimako
HDHelen Dimaras
Helen Dimaras
Purpose: To examine the determinants of retinoblastoma treatment delay in children diagnosed with retinoblastoma in Ghana. Methods: : The study is a retrospective cross-sectional review of hospital records of children with retinoblastoma from treatment centers in Ghana from 2014 to 2019. Data were collected by trained ophthalmology residents and nurses and entered into a REDCap (Research Electronic Data Capture) database. Frequencies and proportions were used in describing categorical variables. Independent samples t‑test and the Mann-Whitney U test were used to compare equality of means and median values. P-values less than 0.05 were considered statistically significant. Results: Of the 234 children, 224 (95.7%) were referred cases and the remaining 10 (4.3%) were walk-ins. The average distance traveled by the children from home to retinoblastoma treatment center was 118.9 ± 128.4 km. The mean parental lag time was 7.6 ± 4.6 months. Longer parental lag time was associated with older age at presentation and unilateral disease (p < 0.05). The mean referral lag time was 0.6 ± 0.5 months. Longer referral lag time was associated with patients who abandoned treatment or died compared with those who survived at last follow-up (p = 0.036). A total of 125 (55.8%) cases abandoned treatment after being referred and seen at a treatment center. Conclusion: Analysis of the pathway from the observance of the first sign of retinoblastoma to presentation to a health facility reveals a need to reduce both parental and referral lag times in order to improve retinoblastoma outcomes. Future studies may help to unravel factors contributing to long parental lag time, referral lag time and abandonment of treatment in Ghana.