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Hawken S, Ducharme R, Murphy MSQ, Olibris B, Bota AB, Wilson LA, Cheng W, Little J, Potter BK, Denize KM, Lamoureux M, Henderson M, Rittenhouse KJ, Price JT, Mwape H, Vwalika B, Musonda P, Pervin J, Chowdhury AKA, Rahman A, Chakraborty P, Stringer JSA, Wilson K. Development and external validation of machine learning algorithms for postnatal gestational age estimation using clinical data and metabolomic markers. PLoS One 2023; 18:e0281074. [PMID: 36877673 PMCID: PMC9987787 DOI: 10.1371/journal.pone.0281074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 01/14/2023] [Indexed: 03/07/2023] Open
Abstract
BACKGROUND Accurate estimates of gestational age (GA) at birth are important for preterm birth surveillance but can be challenging to obtain in low income countries. Our objective was to develop machine learning models to accurately estimate GA shortly after birth using clinical and metabolomic data. METHODS We derived three GA estimation models using ELASTIC NET multivariable linear regression using metabolomic markers from heel-prick blood samples and clinical data from a retrospective cohort of newborns from Ontario, Canada. We conducted internal model validation in an independent cohort of Ontario newborns, and external validation in heel prick and cord blood sample data collected from newborns from prospective birth cohorts in Lusaka, Zambia and Matlab, Bangladesh. Model performance was measured by comparing model-derived estimates of GA to reference estimates from early pregnancy ultrasound. RESULTS Samples were collected from 311 newborns from Zambia and 1176 from Bangladesh. The best-performing model accurately estimated GA within about 6 days of ultrasound estimates in both cohorts when applied to heel prick data (MAE 0.79 weeks (95% CI 0.69, 0.90) for Zambia; 0.81 weeks (0.75, 0.86) for Bangladesh), and within about 7 days when applied to cord blood data (1.02 weeks (0.90, 1.15) for Zambia; 0.95 weeks (0.90, 0.99) for Bangladesh). CONCLUSIONS Algorithms developed in Canada provided accurate estimates of GA when applied to external cohorts from Zambia and Bangladesh. Model performance was superior in heel prick data as compared to cord blood data.
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Affiliation(s)
- Steven Hawken
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
- * E-mail:
| | - Robin Ducharme
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Malia S. Q. Murphy
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Brieanne Olibris
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - A. Brianne Bota
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Lindsay A. Wilson
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Wei Cheng
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Julian Little
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, Ontario, Canada
| | - Beth K. Potter
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, Ontario, Canada
| | - Kathryn M. Denize
- Newborn Screening Ontario, Children’s Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Monica Lamoureux
- Newborn Screening Ontario, Children’s Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Matthew Henderson
- Newborn Screening Ontario, Children’s Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Katelyn J. Rittenhouse
- University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Joan T. Price
- University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | | | - Bellington Vwalika
- Department of Obstetrics and Gynaecology, University of Zambia School of Medicine, Lusaka, Zambia
| | - Patrick Musonda
- Department of Medical Statistics, University of Zambia College of Public Health, Lusaka, Zambia
| | - Jesmin Pervin
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | | | - Anisur Rahman
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | - Pranesh Chakraborty
- Newborn Screening Ontario, Children’s Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Jeffrey S. A. Stringer
- University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Kumanan Wilson
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, Ontario, Canada
- Faculty of Medicine, Department of Medicine, University of Ottawa, Ottawa, Ontario, Canada
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2
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Bota B, Ward V, Lamoureux M, Santander E, Ducharme R, Hawken S, Potter BK, Atito R, Nyamanda B, Munga S, Otieno N, Chakraborty S, Saha S, Stringer JS, Mwape H, Price JT, Mujuru HA, Chimhini G, Magwali T, Chakraborty P, Darmstadt GL, Wilson K. Unlocking the global health potential of dried blood spot cards. J Glob Health 2022; 12:03027. [PMID: 35841606 PMCID: PMC9288235 DOI: 10.7189/jogh.12.03027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Affiliation(s)
- Brianne Bota
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Canada
| | - Victoria Ward
- Prematurity Research Center, Department of Pediatrics, Stanford University School of Medicine, Stanford, California, USA
| | - Monica Lamoureux
- Newborn Screening Ontario, Children's Hospital of Eastern Ontario, Ottawa, Canada
| | - Emeril Santander
- Newborn Screening Ontario, Children's Hospital of Eastern Ontario, Ottawa, Canada
| | - Robin Ducharme
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Canada
| | - Steven Hawken
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Canada.,School of Epidemiology and Public Health, University of Ottawa, Ottawa, Canada
| | - Beth K Potter
- Department of Pediatrics, University of Ottawa, Ottawa, Canada
| | - Raphael Atito
- Kenya Medical Research Institute (KEMRI), Center for Global Health Research, Kisumu, Kenya
| | - Bryan Nyamanda
- Kenya Medical Research Institute (KEMRI), Center for Global Health Research, Kisumu, Kenya
| | - Stephen Munga
- Kenya Medical Research Institute (KEMRI), Center for Global Health Research, Kisumu, Kenya
| | - Nancy Otieno
- Kenya Medical Research Institute (KEMRI), Center for Global Health Research, Kisumu, Kenya
| | | | - Samir Saha
- Child Health Research Foundation, Mirzapur, Bangladesh
| | - Jeffrey Sa Stringer
- Department of Obstetrics and Gynecology, UNC School of Medicine, Chapel Hill, North Carolina, USA.,UNC Global Projects Zambia, Lusaka, Zambia
| | | | - Joan T Price
- Department of Obstetrics and Gynecology, UNC School of Medicine, Chapel Hill, North Carolina, USA.,UNC Global Projects Zambia, Lusaka, Zambia
| | - Hilda Angela Mujuru
- Department of Paediatrics and Child Health, University of Zimbabwe, Harare, Zimbabwe
| | - Gwendoline Chimhini
- Department of Paediatrics and Child Health, University of Zimbabwe, Harare, Zimbabwe
| | - Thulani Magwali
- Department of Obstetrics and Gynaecology, Faculty of Medicine and Health Sciences, University of Zimbabwe, Harare, Zimbabwe
| | - Pranesh Chakraborty
- Newborn Screening Ontario, Children's Hospital of Eastern Ontario, Ottawa, Canada.,Department of Pediatrics, University of Ottawa, Ottawa, Canada
| | - Gary L Darmstadt
- Prematurity Research Center, Department of Pediatrics, Stanford University School of Medicine, Stanford, California, USA
| | - Kumanan Wilson
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Canada.,School of Epidemiology and Public Health, University of Ottawa, Ottawa, Canada.,Department of Medicine, University of Ottawa, Ottawa, Canada.,Bruyere Research Institute, Ottawa, Ontario
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3
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Chibwesha CJ, Mollan KR, Ford CE, Shibemba A, Saha PT, Lusaka M, Mbewe F, Allmon AG, Lungu R, Spiegel HML, Mweni E, Mwape H, Kankasa C, Chi BH, Stringer JSA. A Randomized Trial of Point-of-Care Early Infant HIV Diagnosis in Zambia. Clin Infect Dis 2021; 75:260-268. [PMID: 34718462 PMCID: PMC9410723 DOI: 10.1093/cid/ciab923] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Point-of-care (POC) early infant diagnosis (EID) provides same-day results and the potential for immediate initiation of antiretroviral therapy (ART). METHODS We conducted a pragmatic trial at six public clinics in Zambia. HIV-exposed infants were individually randomized to either: (a) POC EID - on-site testing with the Alere q HIV-1/2 Detect or (b) enhanced standard of care (SOC) EID - off-site testing at a public laboratory. HIV-infected infants were referred for ART and followed for 12 months. Our primary outcome was defined as alive, in care, and virally suppressed at 12 months. RESULTS Between March 2016 and November 2018, we randomized 4,000 HIV-exposed infants to POC (n=1,989) or SOC (n=2,011). All but two infants in the POC group received same-day results, while the median time to result in the SOC group was 27 (IQR: 22-30) days. Eighty-one (2%, 95% CI: 1.6-2.5%) infants were diagnosed with HIV. Although ART initiation was high, there were 15 (19%) deaths, 15 (19%) follow-up losses, and 31 (38%) virologic failures. By 12 months, only 20 of 81 (25%, 95% CI: 15-34%) HIV-infected infants were alive, in care, and virally suppressed: 13 (30%, 95% CI: 16-43%) infants in the POC group vs. 7 (19%, 95% CI: 6-32%) in the SOC group (RR: 1.56, 95% CI: 0.7-3.50). CONCLUSIONS POC EID eliminated diagnostic delays and accelerated ART initiation but did not translate into definitive improvement in 12-month outcomes. In settings where centralized EID is well functioning, POC EID is unlikely to improve pediatric HIV outcomes.
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Affiliation(s)
- Carla J Chibwesha
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,UNC Global Projects - Zambia, Lusaka, Zambia
| | - Katie R Mollan
- Biostatistics Core, Center for AIDS Research, University of North Carolina at Chapel Hill; Chapel Hill, NC, USA
| | - Catherine E Ford
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,UNC Global Projects - Zambia, Lusaka, Zambia
| | - Aaron Shibemba
- Department of Pathology and Microbiology, University Teaching Hospital, Lusaka, Zambia
| | - Pooja T Saha
- Biostatistics Core, Center for AIDS Research, University of North Carolina at Chapel Hill; Chapel Hill, NC, USA
| | | | | | - Andrew G Allmon
- Biostatistics Core, Center for AIDS Research, University of North Carolina at Chapel Hill; Chapel Hill, NC, USA
| | - Rose Lungu
- UNC Global Projects - Zambia, Lusaka, Zambia
| | | | | | | | - Chipepo Kankasa
- Department of Paediatrics and Child Health, University Teaching Hospital, Lusaka, Zambia
| | - Benjamin H Chi
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,UNC Global Projects - Zambia, Lusaka, Zambia
| | - Jeffrey S A Stringer
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,UNC Global Projects - Zambia, Lusaka, Zambia
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Price JT, Vwalika B, Freeman BL, Cole SR, Saha PT, Mbewe FM, Phiri WM, Peterson M, Muyangwa D, Sindano N, Mwape H, Smithmyer ME, Kasaro MP, Rouse DJ, Goldenberg RL, Chomba E, Stringer JSA. Weekly 17 alpha-hydroxyprogesterone caproate to prevent preterm birth among women living with HIV: a randomised, double-blind, placebo-controlled trial. Lancet HIV 2021; 8:e605-e613. [PMID: 34509197 PMCID: PMC8476342 DOI: 10.1016/s2352-3018(21)00150-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 06/08/2021] [Accepted: 06/22/2021] [Indexed: 01/03/2023]
Abstract
BACKGROUND Women with HIV face an increased risk of preterm birth. 17 alpha-hydroxyprogesterone caproate (17P) has been shown in some trials to reduce early delivery among women with a history of spontaneous preterm birth. We investigated whether 17P would reduce this risk among women with HIV. METHODS We did a randomised, double-blind, placebo-controlled trial in pregnant women with HIV at the University Teaching Hospital and Kamwala District Health Centre in Lusaka, Zambia. Eligible patients were women aged 18 years or older with confirmed HIV-1 infection, viable intrauterine singleton pregnancy at less than 24 weeks of gestation, and were receiving or intending to commence antiretroviral therapy during pregnancy. Exclusion criteria were major uterine or fetal anomaly; planned or in situ cervical cerclage; evidence of threatened miscarriage, preterm labour, or ruptured membranes at screening; medical contraindication to 17P; previous participation in the trial; or history of spontaneous preterm birth. Eligible participants provided written informed consent and were randomly assigned (1:1) to receive 250 mg intramuscular 17P or placebo once per week, starting between 16 and 24 weeks of gestation until delivery, stillbirth, or reaching term (37 weeks). Participants and study staff were masked to assignment, except for pharmacy staff who did random assignment and prepared injections but did not interact with participants. The primary outcome was a composite of delivery before 37 weeks or stillbirth at any gestational age. Patients attended weekly visits for study drug injections and antenatal care. We estimated the absolute and relative difference in risk of the primary outcome and safety events between treatment groups by intention to treat. This trial is registered with ClinicalTrials.gov, NCT03297216, and is complete. FINDINGS Between Feb 7, 2018 and Jan 13, 2020, we assessed 1042 women for inclusion into the study. 242 women were excluded after additional assessments, and 800 eligible patients were enrolled and randomly assigned to receive intramuscular 17P (n=399) or placebo (n=401). Baseline characteristics were similar between groups. Adherence to study drug injections was 98% in both groups, no patients were lost to follow-up, and the final post-partum visit was on Aug 6, 2020. 36 (9%) of 399 participants assigned to 17P had preterm birth or stillbirth, compared with 36 (9%) of 401 patients assigned to placebo (risk difference 0·1, 95% CI -3·9 to 4·0; relative risk 1·0, 95% CI 0·6 to 1·6; p=0·98). Intervention-related adverse events were reported by 140 (18%) of 800 participants and occurred in similar proportions in both randomisation groups. No serious adverse events were reported. INTERPRETATION Although 17P seems to be safe and acceptable to participants, available data do not support the use of the drug to prevent preterm birth among women whose risk derives solely from HIV infection. The low risk of preterm birth in both randomisation groups warrants further investigation. FUNDING US National Institutes of Health and the Bill and Melinda Gates Foundation.
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Affiliation(s)
- Joan T Price
- Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, NC, USA; Departments of Obstetrics and Gynaecology, University of Zambia School of Medicine, Lusaka, Zambia.
| | - Bellington Vwalika
- Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, NC, USA; Departments of Obstetrics and Gynaecology, University of Zambia School of Medicine, Lusaka, Zambia
| | - Bethany L Freeman
- Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, NC, USA
| | - Stephen R Cole
- Epidemiology, University of North Carolina at Chapel Hill, NC, USA
| | - Pooja T Saha
- Biostatistics, University of North Carolina at Chapel Hill, NC, USA
| | | | | | - Marc Peterson
- Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, NC, USA
| | | | | | | | - Megan E Smithmyer
- Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, NC, USA
| | - Margaret P Kasaro
- Departments of Obstetrics and Gynaecology, University of Zambia School of Medicine, Lusaka, Zambia; UNC Global Projects-Zambia, Lusaka, Zambia
| | - Dwight J Rouse
- Department of Obstetrics and Gynecology, Brown University School of Medicine, Providence, RI, USA
| | - Robert L Goldenberg
- Department of Obstetrics and Gynecology, Columbia University, New York, NY, USA
| | - Elwyn Chomba
- Paediatrics, University of Zambia School of Medicine, Lusaka, Zambia
| | - Jeffrey S A Stringer
- Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, NC, USA
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5
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Mabula‐Bwalya CM, Smithmyer ME, Mwape H, Chipili G, Conner M, Vwalika B, De Paris K, Stringer JS, Price JT. Association of mid-trimester maternal angiogenic biomarkers with small-for-gestational-age infants in an urban Zambian cohort: a nested case-control study. Int J Gynaecol Obstet 2021; 157:604-612. [PMID: 34358336 PMCID: PMC8818065 DOI: 10.1002/ijgo.13860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 08/20/2021] [Accepted: 08/05/2021] [Indexed: 11/07/2022]
Abstract
Objective To investigate whether angiogenic biomarker concentrations differ between women who deliver small‐for‐gestational‐age (SGA) infants (<10th centile birth weight for gestational age) compared with controls, because identifying SGA risk early could improve outcomes. Methods This case‐control study compared serum concentrations of angiogenic biomarkers before 24 weeks of pregnancy from 62 women who delivered SGA infants (cases) and 62 control women from an urban Zambian cohort. Odds of delivering an SGA infant were calculated using conditional logistic regression. Results Placental growth factor (PlGF), soluble fms‐like tyrosine kinase (sFLT‐1) and soluble endoglin (sEng) in controls were 37.74 pg/mL (interquartile range [IQR] 23.12–63.15), 2525.18 pg/mL (IQR 1502.21–4265.54) and 2408.18 pg/mL (IQR 1854.87–3017.94), respectively. SGA cases had higher PlGF (40.50 pg/mL, IQR 22.81–67.94) and sFLT‐1 (2613.06 pg/mL, IQR 1720.58–3722.50), and lower sEng (2038.06 pg/mL, IQR 1445.25–3372.26). Participants with sEng concentration below and concomitant sFLT‐1 concentration above their respective thresholds (n = 40) had five‐fold higher odds of SGA (adjusted odds ratio 4.77, 95% confidence interval 1.61–14.1; P = 0.005). Conclusion Biomarker concentrations were similar between cases and controls. Participants with concomitant low sEng and high sFLT‐1 had the highest odds of SGA, suggesting that a combination of biomarkers may better for predicting SGA than single biomarkers. Prediction of SGA risk using the interaction of multiple angiogenic biomarkers may perform better than using a single angiogenic biomarker concentration before 24 weeks gestation.
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Affiliation(s)
| | | | - Humphrey Mwape
- University of North Carolina Global Projects ZambiaLusakaZambia
| | - Gabriel Chipili
- University of North Carolina Global Projects ZambiaLusakaZambia
| | - Madelyn Conner
- University of North Carolina at Chapel HillChapel HillNCUSA
| | | | | | | | - Joan T. Price
- University of North Carolina at Chapel HillChapel HillNCUSA
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6
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Smithmyer ME, Mabula-Bwalya CM, Mwape H, Chipili G, Spelke BM, Kasaro MP, De Paris K, Vwalika B, Sebastião YV, Stringer JSA, Price JT. Circulating angiogenic factors and HIV among pregnant women in Zambia: a nested case-control study. BMC Pregnancy Childbirth 2021; 21:534. [PMID: 34320947 PMCID: PMC8317322 DOI: 10.1186/s12884-021-03965-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 06/24/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Maternal HIV increases the risk of adverse birth outcomes including preterm birth, fetal growth restriction, and stillbirth, but the biological mechanism(s) underlying this increased risk are not well understood. We hypothesized that maternal HIV may lead to adverse birth outcomes through an imbalance in angiogenic factors involved in the vascular endothelial growth factor (VEGF) signaling pathway. METHODS In a case-control study nested within an ongoing cohort in Zambia, our primary outcomes were serum concentrations of VEGF-A, soluble endoglin (sEng), placental growth factor (PlGF), and soluble fms-like tyrosine kinase-1 (sFLT-1). These were measured in 57 women with HIV (cases) and 57 women without HIV (controls) before 16 gestational weeks. We used the Wilcoxon rank-sum and linear regression controlling for maternal body mass index (BMI) and parity to assess the difference in biomarker concentrations between cases and controls. We also used logistic regression to test for associations between biomarker concentration and adverse pregnancy outcomes (preeclampsia, preterm birth, small for gestational age, stillbirth, and a composite of preterm birth or stillbirth). RESULTS Compared to controls, women with HIV had significantly lower median concentrations of PlGF (7.6 vs 10.2 pg/mL, p = 0.02) and sFLT-1 (1647.9 vs 2055.6 pg/mL, p = 0.04), but these findings were not confirmed in adjusted analysis. PlGF concentration was lower among women who delivered preterm compared to those who delivered at term (6.7 vs 9.6 pg/mL, p = 0.03) and among those who experienced the composite adverse birth outcome (6.2 vs 9.8 pg/mL, p = 0.02). Median sFLT-1 concentration was lower among participants with the composite outcome (1621.0 vs 1945.9 pg/mL, p = 0.04), but the association was not significant in adjusted analysis. sEng was not associated with either adverse birth outcomes or HIV. VEGF-A was undetectable by Luminex in all specimens. CONCLUSIONS We present preliminary findings that HIV is associated with a shift in the VEGF signaling pathway in early pregnancy, although adjusted analyses were inconclusive. We confirm an association between angiogenic biomarkers and adverse birth outcomes in our population. Larger studies are needed to further elucidate the role of HIV on placental angiogenesis and adverse birth outcomes.
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Affiliation(s)
- Megan E Smithmyer
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
| | | | - Humphrey Mwape
- University of North Carolina Global Projects Zambia, Lusaka, Zambia
| | - Gabriel Chipili
- University of North Carolina Global Projects Zambia, Lusaka, Zambia
| | - Bridget M Spelke
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Margaret P Kasaro
- University of North Carolina Global Projects Zambia, Lusaka, Zambia
- Department of Obstetrics and Gynaecology, University of Zambia School of Medicine, Lusaka, Zambia
| | - Kristina De Paris
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Bellington Vwalika
- Department of Obstetrics and Gynaecology, University of Zambia School of Medicine, Lusaka, Zambia
| | - Yuri V Sebastião
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Jeffrey S A Stringer
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- University of North Carolina Global Projects Zambia, Lusaka, Zambia
| | - Joan T Price
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- University of North Carolina Global Projects Zambia, Lusaka, Zambia
- Department of Obstetrics and Gynaecology, University of Zambia School of Medicine, Lusaka, Zambia
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7
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Rittenhouse KJ, Mwape H, Nelson JA, Mwale J, Chipili G, Price JT, Hudgens M, Stringer EM, De Paris K, Vwalika B, Stringer JS. Maternal HIV, antiretroviral timing, and spontaneous preterm birth in an urban Zambian cohort: the role of local and systemic inflammation. AIDS 2021; 35:555-565. [PMID: 33394679 PMCID: PMC7944942 DOI: 10.1097/qad.0000000000002808] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To assess plasma and vaginal inflammation in three antenatal groups (HIV-uninfected women, HIV-infected women entering care on preconceptional ART, and HIV-infected women not on preconceptional ART) and whether these measures are associated with spontaneous preterm birth (sPTB). DESIGN Case--control study nested within a pregnancy cohort in Lusaka, Zambia. METHODS We analyzed 11 pro-inflammatory and two anti-inflammatory markers in 207 women with paired plasma and vaginal specimens collected between 16 and 20 gestational weeks. Among 51 HIV-infected women, we repeated the assays in 24-34-week samples. We used confirmatory factor analysis to create inflammation scores and compared them among the three groups. RESULTS At baseline, HIV-infected women not on ART had higher vaginal pro-inflammatory scores than HIV-uninfected women [mean 0.37 (95% CI -0.06 to 0.80) vs. -0.02 (-0.32 to 0.27), P = 0.02]. In repeat testing, women not on preconceptional ART had an increase in vaginal inflammation between the baseline and 24-34-week visits compared with those continuing preconceptional ART [mean 0.62 (95% CI -0.80 to 4.20) vs. -0.07 (-2.78 to 2.11), P = 0.04]. In multivariate analyses, baseline vaginal inflammation predicted sPTB (aOR 1.5; 95% CI 1.0-2.3; P = 0.02). Plasma inflammation did not differ by HIV or ART exposure and was not associated with sPTB. CONCLUSION Women not receiving ART at entry into pregnancy care had more vaginal inflammation than women entering on treatment. They also experienced an increase in vaginal inflammation between the two sampling timepoints, possibly as a consequence of ART initiation. Vaginal (but not systemic) inflammation was associated with sPTB and offers a potential mechanistic insight into this important adverse birth outcome.
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Affiliation(s)
- Katelyn J. Rittenhouse
- University of North Carolina at Chapel Hill, Chapel Hill, USA
- University of North Carolina Global Projects-Zambia, Lusaka, Zambia
| | - Humphrey Mwape
- University of North Carolina Global Projects-Zambia, Lusaka, Zambia
| | | | - John Mwale
- University of North Carolina Global Projects-Zambia, Lusaka, Zambia
| | - Gabriel Chipili
- University of North Carolina Global Projects-Zambia, Lusaka, Zambia
| | - Joan T. Price
- University of North Carolina at Chapel Hill, Chapel Hill, USA
- University of North Carolina Global Projects-Zambia, Lusaka, Zambia
| | - Michael Hudgens
- University of North Carolina at Chapel Hill, Chapel Hill, USA
| | - Elizabeth M. Stringer
- University of North Carolina at Chapel Hill, Chapel Hill, USA
- University of North Carolina Global Projects-Zambia, Lusaka, Zambia
| | | | | | - Jeffrey S.A. Stringer
- University of North Carolina at Chapel Hill, Chapel Hill, USA
- University of North Carolina Global Projects-Zambia, Lusaka, Zambia
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8
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Price JT, Vwalika B, Freeman BL, Saha PT, Cole SR, Mbewe F, Phiri WM, Peterson M, Muyangwa D, Sindano N, Mwape H, Smithmyer ME, Kasaro MP, Mofenson LM, Rouse DJ, Goldenberg RL, Chomba E, Stringer J. 10 A randomized trial of 17-hydroxyprogesterone caproate to prevent preterm birth among women living with HIV. Am J Obstet Gynecol 2021. [DOI: 10.1016/j.ajog.2020.12.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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Bota AB, Ward V, Hawken S, Wilson LA, Lamoureux M, Ducharme R, Murphy MSQ, Denize KM, Henderson M, Saha SK, Akther S, Otieno NA, Munga S, Atito RO, Stringer JSA, Mwape H, Price JT, Mujuru HA, Chimhini G, Magwali T, Mudawarima L, Chakraborty P, Darmstadt GL, Wilson K. Metabolic gestational age assessment in low resource settings: a validation protocol. Gates Open Res 2021; 4:150. [PMID: 33501414 PMCID: PMC7801859 DOI: 10.12688/gatesopenres.13155.2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/22/2021] [Indexed: 11/20/2022] Open
Abstract
Preterm birth is the leading global cause of neonatal morbidity and mortality. Reliable gestational age estimates are useful for quantifying population burdens of preterm birth and informing allocation of resources to address the problem. However, evaluating gestational age in low-resource settings can be challenging, particularly in places where access to ultrasound is limited. Our group has developed an algorithm using newborn screening analyte values derived from dried blood spots from newborns born in Ontario, Canada for estimating gestational age within one to two weeks. The primary objective of this study is to validate a program that derives gestational age estimates from dried blood spot samples (heel-prick or cord blood) collected from health and demographic surveillance sites and population representative health facilities in low-resource settings in Zambia, Kenya, Bangladesh and Zimbabwe. We will also pilot the use of an algorithm to identify birth percentiles based on gestational age estimates and weight to identify small for gestational age infants. Once collected from local sites, samples will be tested by the Newborn Screening Ontario laboratory at the Children's Hospital of Eastern Ontario (CHEO) in Ottawa, Canada. Analyte values will be obtained through laboratory analysis for estimation of gestational age as well as screening for other diseases routinely conducted at Ontario's newborn screening program. For select conditions, abnormal screening results will be reported back to the sites in real time to facilitate counseling and future clinical management. We will determine the accuracy of our existing algorithm for estimation of gestational age in these newborn samples. Results from this research hold the potential to create a feasible method to assess gestational age at birth in low- and middle-income countries where reliable estimation may be otherwise unavailable.
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Affiliation(s)
- A. Brianne Bota
- Clinical Epidemiology Program, Ottawa Health Research Institute, Ottawa, ON, Canada
| | - Victoria Ward
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, USA
| | - Stephen Hawken
- Clinical Epidemiology Program, Ottawa Health Research Institute, Ottawa, ON, Canada
| | - Lindsay A. Wilson
- Clinical Epidemiology Program, Ottawa Health Research Institute, Ottawa, ON, Canada
| | - Monica Lamoureux
- Newborn Screening Ontario, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Robin Ducharme
- Clinical Epidemiology Program, Ottawa Health Research Institute, Ottawa, ON, Canada
| | - Malia S. Q. Murphy
- Clinical Epidemiology Program, Ottawa Health Research Institute, Ottawa, ON, Canada
| | - Kathryn M. Denize
- Newborn Screening Ontario, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Matthew Henderson
- Newborn Screening Ontario, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Samir K. Saha
- Child Health Research Foundation, Mizapur, Bangladesh
| | - Salma Akther
- Child Health Research Foundation, Mizapur, Bangladesh
| | - Nancy A. Otieno
- Kenya Medical Research Institute (KEMRI), Center for Global Health Research, Kisumu, Kenya
| | - Stephen Munga
- Kenya Medical Research Institute (KEMRI), Center for Global Health Research, Kisumu, Kenya
| | - Raphael O. Atito
- Kenya Medical Research Institute (KEMRI), Center for Global Health Research, Kisumu, Kenya
| | | | | | - Joan T. Price
- Department of Obstetrics and Gynecology, UNC School of Medicine, Chapel Hill, NC, USA
| | - Hilda Angela Mujuru
- Department of Paediatrics and Child Health, University of Zimbabwe, Avondale, Zimbabwe
| | - Gwendoline Chimhini
- Department of Paediatrics and Child Health, University of Zimbabwe, Avondale, Zimbabwe
| | - Thulani Magwali
- Department of Obstetrics and Gynaecology, University of Zimbabwe, Avondale, Zimbabwe
| | - Louisa Mudawarima
- Department of Paediatrics and Child Health, University of Zimbabwe, Avondale, Zimbabwe
| | - Pranesh Chakraborty
- Newborn Screening Ontario, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Gary L. Darmstadt
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, USA
| | - Kumanan Wilson
- Clinical Epidemiology Program, Ottawa Health Research Institute, Ottawa, ON, Canada
- Department of Medicine, University of Ottawa, Ottawa, Canada
- Bruyère Research Institute, Otttawa, Canada
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10
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Bota AB, Ward V, Hawken S, Wilson LA, Lamoureux M, Ducharme R, Murphy MSQ, Denize KM, Henderson M, Saha SK, Akther S, Otieno NA, Munga S, Atito RO, Stringer JSA, Mwape H, Price JT, Mujuru HA, Chimhini G, Magwali T, Mudawarima L, Chakraborty P, Darmstadt GL, Wilson K. Metabolic gestational age assessment in low resource settings: a validation protocol. Gates Open Res 2020. [DOI: 10.12688/gatesopenres.13155.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Preterm birth is the leading global cause of neonatal morbidity and mortality. Reliable gestational age estimates are useful for quantifying population burdens of preterm birth and informing allocation of resources to address the problem. However, evaluating gestational age in low-resource settings can be challenging, particularly in places where access to ultrasound is limited. Our group has developed an algorithm using newborn screening analyte values derived from dried blood spots from newborns born in Ontario, Canada for estimating gestational age within one to two weeks. The primary objective of this study is to validate a program that derives gestational age estimates from dried blood spot samples (heel-prick or cord blood) collected from health and demographic surveillance sites and population representative health facilities in low-resource settings in Zambia, Kenya, Bangladesh and Zimbabwe. We will also pilot the use of an algorithm to identify birth percentiles based on gestational age estimates and weight to identify small for gestational age infants. Once collected from local sites, samples will be tested by the Newborn Screening Ontario laboratory at the Children’s Hospital of Eastern Ontario (CHEO) in Ottawa, Canada. Analyte values will be obtained through laboratory analysis for estimation of gestational age as well as screening for other diseases routinely conducted at Ontario’s newborn screening program. For select conditions, abnormal screening results will be reported back to the sites in real time to facilitate counseling and future clinical management. We will determine the accuracy of our existing algorithm for estimation of gestational age in these newborn samples. Results from this research hold the potential to create a feasible method to assess gestational age at birth in low- and middle-income countries where reliable estimation may be otherwise unavailable.
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11
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Price JT, Vwalika B, Rittenhouse KJ, Mwape H, Winston J, Freeman BL, Sindano N, Stringer EM, Kasaro MP, Chi BH, Stringer JS. Adverse birth outcomes and their clinical phenotypes in an urban Zambian cohort. Gates Open Res 2020; 3:1533. [PMID: 32161903 PMCID: PMC7047437 DOI: 10.12688/gatesopenres.13046.2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/14/2019] [Indexed: 11/20/2022] Open
Abstract
Background: Few cohort studies of pregnancy in sub-Saharan Africa use rigorous gestational age dating and clinical phenotyping. As a result, incidence and risk factors of adverse birth outcomes are inadequately characterized. Methods: The Zambian Preterm Birth Prevention Study (ZAPPS) is a prospective observational cohort established to investigate adverse birth outcomes at a referral hospital in urban Lusaka. This report describes ZAPPS phase I, enrolled August 2015 to September 2017. Women were followed through pregnancy and 42 days postpartum. At delivery, study staff assessed neonatal vital status, birthweight, and sex, and assigned a delivery phenotype. Primary outcomes were: (1) preterm birth (PTB; delivery <37 weeks), (2) small-for-gestational-age (SGA; <10 th percentile weight-for-age at birth), and (3) stillbirth (SB; delivery of an infant without signs of life). Results: ZAPPS phase I enrolled 1450 women with median age 27 years (IQR 23-32). Most participants (68%) were multiparous, of whom 41% reported a prior PTB and 14% reported a prior stillbirth. Twins were present in 3% of pregnancies, 3% of women had short cervix (<25mm), 24% of women were HIV seropositive, and 5% were syphilis seropositive. Of 1216 (84%) retained at delivery, 15% were preterm, 18% small-for-gestational-age, and 4% stillborn. PTB risk was higher with prior PTB (aRR 1.88; 95%CI 1.32-2.68), short cervix (aRR 2.62; 95%CI 1.68-4.09), twins (aRR 5.22; 95%CI 3.67-7.43), and antenatal hypertension (aRR 2.04; 95%CI 1.43-2.91). SGA risk was higher with twins (aRR 2.75; 95%CI 1.81-4.18) and antenatal hypertension (aRR 1.62; 95%CI 1.16-2.26). SB risk was higher with short cervix (aRR 6.42; 95%CI 2.56-16.1). Conclusio ns: This study confirms high rates of PTB, SGA, and SB among pregnant women in Lusaka, Zambia. Accurate gestational age dating and careful ascertainment of delivery data are critical to understanding the scope of adverse birth outcomes in low-resource settings.
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Affiliation(s)
- Joan T Price
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina, School of Medicine, Chapel Hill, NC, USA.,Department of Obstetrics and Gynaecology, University of Zambia School of Medicine, Lusaka, Zambia.,UNC Global Projects - Zambia, Lusaka, Zambia
| | - Bellington Vwalika
- Department of Obstetrics and Gynaecology, University of Zambia School of Medicine, Lusaka, Zambia
| | - Katelyn J Rittenhouse
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina, School of Medicine, Chapel Hill, NC, USA
| | | | - Jennifer Winston
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina, School of Medicine, Chapel Hill, NC, USA
| | - Bethany L Freeman
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina, School of Medicine, Chapel Hill, NC, USA
| | | | - Elizabeth M Stringer
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina, School of Medicine, Chapel Hill, NC, USA
| | | | - Benjamin H Chi
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina, School of Medicine, Chapel Hill, NC, USA
| | - Jeffrey Sa Stringer
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina, School of Medicine, Chapel Hill, NC, USA
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12
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Price JT, Vwalika B, Rittenhouse KJ, Mwape H, Winston J, Freeman BL, Sindano N, Stringer EM, Kasaro MP, Chi BH, Stringer JS. Adverse birth outcomes and their clinical phenotypes in an urban Zambian cohort. Gates Open Res 2020; 3:1533. [PMID: 32161903 DOI: 10.12688/gatesopenres.13046.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/14/2019] [Indexed: 12/25/2022] Open
Abstract
Background: Few cohort studies of pregnancy in sub-Saharan Africa use rigorous gestational age dating and clinical phenotyping. As a result, incidence and risk factors of adverse birth outcomes are inadequately characterized. Methods: The Zambian Preterm Birth Prevention Study (ZAPPS) is a prospective observational cohort established to investigate adverse birth outcomes at a referral hospital in urban Lusaka. This report describes ZAPPS phase I, enrolled August 2015 to September 2017. Women were followed through pregnancy and 42 days postpartum. At delivery, study staff assessed neonatal vital status, birthweight, and sex, and assigned a delivery phenotype. Primary outcomes were: (1) preterm birth (PTB; delivery <37 weeks), (2) small-for-gestational-age (SGA; <10 th percentile weight-for-age at birth), and (3) stillbirth (SB; delivery of an infant without signs of life). Results: ZAPPS phase I enrolled 1450 women with median age 27 years (IQR 23-32). Most participants (68%) were multiparous, of whom 41% reported a prior PTB and 14% reported a prior stillbirth. Twins were present in 3% of pregnancies, 3% of women had short cervix (<25mm), 24% of women were HIV seropositive, and 5% were syphilis seropositive. Of 1216 (84%) retained at delivery, 15% were preterm, 18% small-for-gestational-age, and 4% stillborn. PTB risk was higher with prior PTB (aRR 1.88; 95%CI 1.32-2.68), short cervix (aRR 2.62; 95%CI 1.68-4.09), twins (aRR 5.22; 95%CI 3.67-7.43), and antenatal hypertension (aRR 2.04; 95%CI 1.43-2.91). SGA risk was higher with twins (aRR 2.75; 95%CI 1.81-4.18) and antenatal hypertension (aRR 1.62; 95%CI 1.16-2.26). SB risk was higher with short cervix (aRR 6.42; 95%CI 2.56-16.1). Conclusio ns: This study confirms high rates of PTB, SGA, and SB among pregnant women in Lusaka, Zambia. Accurate gestational age dating and careful ascertainment of delivery data are critical to understanding the scope of adverse birth outcomes in low-resource settings.
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Affiliation(s)
- Joan T Price
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina, School of Medicine, Chapel Hill, NC, USA.,Department of Obstetrics and Gynaecology, University of Zambia School of Medicine, Lusaka, Zambia.,UNC Global Projects - Zambia, Lusaka, Zambia
| | - Bellington Vwalika
- Department of Obstetrics and Gynaecology, University of Zambia School of Medicine, Lusaka, Zambia
| | - Katelyn J Rittenhouse
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina, School of Medicine, Chapel Hill, NC, USA
| | | | - Jennifer Winston
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina, School of Medicine, Chapel Hill, NC, USA
| | - Bethany L Freeman
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina, School of Medicine, Chapel Hill, NC, USA
| | | | - Elizabeth M Stringer
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina, School of Medicine, Chapel Hill, NC, USA
| | | | - Benjamin H Chi
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina, School of Medicine, Chapel Hill, NC, USA
| | - Jeffrey Sa Stringer
- Division of Global Women's Health, Department of Obstetrics and Gynecology, University of North Carolina, School of Medicine, Chapel Hill, NC, USA
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13
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Castillo MC, Fuseini NM, Rittenhouse K, Price JT, Freeman BL, Mwape H, Winston J, Sindano N, Baruch-Gravett C, Chi BH, Kasaro MP, Litch JA, Stringer JSA, Vwalika B. The Zambian Preterm Birth Prevention Study (ZAPPS): Cohort characteristics at enrollment. Gates Open Res 2019. [PMID: 30706053 DOI: 10.12688/gatesopenres.12820.1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Background: Sub-Saharan Africa bears a disproportionate burden of preterm birth and other adverse outcomes. A better understanding of the demographic, clinical, and biologic underpinnings of these adverse outcomes is urgently needed to plan interventions and inform new discovery. Methods: The Zambian Preterm Birth Prevention Study (ZAPPS) is a prospective observational cohort established at the Women and Newborn Hospital (WNH) in Lusaka, Zambia. We recruit pregnant women from district health centers and the WNH and offer ultrasound examination to determine eligibility. Participants receive routine obstetrical care, lab testing, midtrimester cervical length measurement, and serial fetal growth monitoring. At delivery, we assess gestational age, birthweight, vital status, and sex and assign a delivery phenotype. We collect blood, urine, and vaginal swab specimens at scheduled visits and store them in an on-site biorepository. In September 2017, enrollment of the ZAPPS Phase 1-the subject of this report-was completed. Phase 2, which is limited to HIV-uninfected women, reopened in January 2018. Results: Between August 2015 and September 2017, we screened 1784 women, of whom 1450 (81.2%) met inclusion criteria and were enrolled. The median age at enrollment was 27 years (IQR 23-32) and median gestational age was 16 weeks (IQR 13-18). Among women with a previous pregnancy (n=1042), 19% (n=194) reported a prior miscarriage. Among parous women (n=992), 41% (n=411) reported a prior preterm birth and 14% (n=126) reported a prior stillbirth. The HIV seroprevalence was 24%. Discussion: We have established a large cohort of pregnant women and newborns at the WNH to characterize the determinants of adverse birth outcomes in Lusaka, Zambia. Our overarching goal is to elucidate biological mechanisms in an effort to identify new strategies for early detection and prevention of adverse outcomes. We hope that findings from this cohort will help guide future studies, clinical care, and policy.
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Affiliation(s)
| | - Nurain M Fuseini
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,UNC Global Projects Zambia, Lusaka, Zambia
| | - Katelyn Rittenhouse
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,UNC Global Projects Zambia, Lusaka, Zambia
| | - Joan T Price
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,UNC Global Projects Zambia, Lusaka, Zambia
| | | | | | - Jennifer Winston
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | | | | | - Benjamin H Chi
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Margaret P Kasaro
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,UNC Global Projects Zambia, Lusaka, Zambia
| | - James A Litch
- Global Alliance for the Prevention of Prematurity and Stillbirth, Seattle, WA, USA
| | | | - Bellington Vwalika
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,University of Zambia School of Medicine, Lusaka, Zambia
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14
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Castillo MC, Fuseini NM, Rittenhouse K, Price JT, Freeman BL, Mwape H, Winston J, Sindano N, Baruch-Gravett C, Chi BH, Kasaro MP, Litch JA, Stringer JSA, Vwalika B. The Zambian Preterm Birth Prevention Study (ZAPPS): Cohort characteristics at enrollment. Gates Open Res 2019; 2:25. [PMID: 30706053 PMCID: PMC6350406 DOI: 10.12688/gatesopenres.12820.3] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/09/2019] [Indexed: 11/20/2022] Open
Abstract
Background: Sub-Saharan Africa bears a disproportionate burden of preterm birth and other adverse outcomes. A better understanding of the demographic, clinical, and biologic underpinnings of these adverse outcomes is urgently needed to plan interventions and inform new discovery. Methods: The Zambian Preterm Birth Prevention Study (ZAPPS) is a prospective observational cohort established at the Women and Newborn Hospital (WNH) in Lusaka, Zambia. We recruit pregnant women from district health centers and the WNH and offer ultrasound examination to determine eligibility. Participants receive routine obstetrical care, lab testing, midtrimester cervical length measurement, and serial fetal growth monitoring. At delivery, we assess gestational age, birthweight, vital status, and sex and assign a delivery phenotype. We collect blood, urine, and vaginal swab specimens at scheduled visits and store them in an on-site biorepository. In September 2017, enrollment of the ZAPPS Phase 1-the subject of this report-was completed. Phase 2, which is limited to HIV-uninfected women, reopened in January 2018. Results: Between August 2015 and September 2017, we screened 1784 women, of whom 1450 (81.2%) met inclusion criteria and were enrolled. The median age at enrollment was 27 years (IQR 23-32) and median gestational age was 16 weeks (IQR 13-18). Among women with a previous pregnancy (n=1042), 19% (n=194) reported a prior miscarriage. Among parous women (n=992), 41% (n=411) reported a prior preterm birth and 14% (n=126) reported a prior stillbirth. The HIV seroprevalence was 24%. Discussion: We have established a large cohort of pregnant women and newborns at the WNH to characterize the determinants of adverse birth outcomes in Lusaka, Zambia. Our overarching goal is to elucidate biological mechanisms in an effort to identify new strategies for early detection and prevention of adverse outcomes. We hope that findings from this cohort will help guide future studies, clinical care, and policy.
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Affiliation(s)
| | - Nurain M Fuseini
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,UNC Global Projects Zambia, Lusaka, Zambia
| | - Katelyn Rittenhouse
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,UNC Global Projects Zambia, Lusaka, Zambia
| | - Joan T Price
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,UNC Global Projects Zambia, Lusaka, Zambia
| | | | | | - Jennifer Winston
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | | | | | - Benjamin H Chi
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Margaret P Kasaro
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,UNC Global Projects Zambia, Lusaka, Zambia
| | - James A Litch
- Global Alliance for the Prevention of Prematurity and Stillbirth, Seattle, WA, USA
| | | | - Bellington Vwalika
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,University of Zambia School of Medicine, Lusaka, Zambia
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15
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Rittenhouse KJ, Mwape H, De Paris K, Nelson J, Winston J, Price JT, Stringer E, Vwalika B, Stringer J. 641: Preconceptional antiretroviral therapy reduces local and systemic inflammation in pregnant women with human immunodeficiency virus. Am J Obstet Gynecol 2019. [DOI: 10.1016/j.ajog.2018.11.663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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16
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Castillo MC, Fuseini NM, Rittenhouse K, Price JT, Freeman BL, Mwape H, Winston J, Sindano N, Baruch-Gravett C, Chi BH, Kasaro MP, Litch JA, Stringer JS, Vwalika B. The Zambian Preterm Birth Prevention Study (ZAPPS): Cohort characteristics at enrollment. Gates Open Res 2018; 2:25. [DOI: 10.12688/gatesopenres.12820.2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/14/2018] [Indexed: 11/20/2022] Open
Abstract
Background:Sub-Saharan Africa bears a disproportionate burden of preterm birth and other adverse outcomes. A better understanding of the demographic, clinical, and biologic underpinnings of these adverse outcomes is urgently needed to plan interventions and inform new discovery. Methods:The Zambian Preterm Birth Prevention Study (ZAPPS) is a prospective observational cohort established at the Women and Newborn Hospital (WNH) in Lusaka, Zambia. We recruit pregnant women from district health centers and the WNH and offer ultrasound examination to determine eligibility. Participants receive routine obstetrical care, lab testing, midtrimester cervical length measurement, and serial fetal growth monitoring. At delivery, we assess gestational age, birthweight, vital status, and sex and assign a delivery phenotype. We collect blood, urine, and vaginal swab specimens at scheduled visits and store them in an on-site biorepository. In September 2017, enrollment of the ZAPPS Phase 1 – the subject of this report – was completed. Phase 2 – which is limited to HIV-uninfected women – reopened in January 2018. Results:Between August 2015 and September 2017, we screened 1784 women, of whom 1450 (81.2%) met inclusion criteria and were enrolled. The median age at enrollment was 27 years (IQR 23–32) and thee median gestational age was 16 weeks (IQR 13–18). Among parous women (N=866; 64%), 21% (N=182) reported a prior miscarriage, 49% (N=424) reported a prior preterm birth, and 13% (N=116) reported a prior stillbirth. The HIV seroprevalence was 24%. Discussion:We have established a large cohort of pregnant women and newborns at the WHN to characterize the determinants of adverse birth outcomes in Lusaka, Zambia. Our overarching goal is to elucidate biological mechanisms in an effort to identify new strategies for early detection and prevention of adverse outcomes. We hope that findings from this cohort will help guide future studies, clinical care, and policy.
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