ArticleAmerican journal of epidemiology2020
Few Losses to Follow-up in a Sub-Saharan African Cancer Cohort via Active Mobile Health Follow-up.
Article in American journal of epidemiology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.
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18 citing papers in PubMed, 1 synthesis or guideline pooled it, 25 citations in OpenAlex.
- Evaluating phone call follow-ups in Sub-Saharan Africa: A systematic review and meta-analysis.PloS one · 2025Pooled it
- Longitudinal changes in health-related quality of life after a breast cancer diagnosis in sub-Saharan Africa: Evidence from the prospective ABC-DO cohort.International journal of cancer · 2026Article
- Quality of life in long-term breast cancer survivors in Sub-Saharan Africa: the African Breast Cancer-Disparities in Outcomes study.Journal of cancer survivorship : research and practice · 2026Article
- Identification and mapping of mHealth interventions applied in palliative care in Sub Saharan Africa: a scoping review.BMC palliative care · 2026Article
- Time to Recurrence of Ameloblastoma and Associated Factors in a Multi-institutional Black Patient Cohort.Journal of racial and ethnic health disparities · 2025Observational
- Measuring the WHO Global Breast Cancer Initiative Pillars' key performance indicators in Sub-Saharan Africa: experience in the African Breast Cancer-Disparities in Outcomes hospital-based cohort study.EClinicalMedicine · 2025Article
- Prognostic impact of diagnostic and therapeutic time delays in breast cancer: an exploratory data analysis for patients at Parirenyatwa Hospital, Zimbabwe.African health sciences · 2024Article
- Geospatial disparities in survival of patients with breast cancer in sub-Saharan Africa from the African Breast Cancer-Disparities in Outcomes cohort (ABC-DO): a prospective cohort study.The Lancet. Global health · 2024Article
- Analysis of the Breast Cancer Journey in Namibia.JAMA network open · 2023Article
- Reproductive history and breast cancer survival: Findings from the African breast cancer-Disparities in outcomes cohort and implications of Africa's fertility transition on breast cancer prognosis.International journal of cancer · 2023Article
- Treatment guideline concordance, initiation, and abandonment in patients with non-metastatic breast cancer from the African Breast Cancer-Disparities in Outcomes (ABC-DO) cohort in sub-Saharan Africa: a prospective cohort study.The Lancet. Oncology · 2022Article
- Disparities in breast cancer survival between women with and without HIV across sub-Saharan Africa (ABC-DO): a prospective, cohort study.The lancet. HIV · 2022Article
- A model for an undergraduate research experience program in quantitative sciences.Journal of statistics and data science education : an official journal of the of the American Statistical Association · 2022Article
- Self-reported arm and shoulder problems in breast cancer survivors in Sub-Saharan Africa: the African Breast Cancer-Disparities in Outcomes cohort study.Breast cancer research : BCR · 2021Article
- Expanding telemedicine to reduce the burden on the healthcare systems and poverty in Africa for a post-coronavirus disease 2019 (COVID-19) pandemic reformation.Global health journal (Amsterdam, Netherlands) · 2021Review
- Breast cancer survival and survival gap apportionment in sub-Saharan Africa (ABC-DO): a prospective cohort study.The Lancet. Global health · 2020Article
- Highlights from the 4th PALOP-AORTIC Conference on Cancer, 29-31 July 2020, Luanda, Angola.Ecancermedicalscience · 2020Article
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22 authors.
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Abstract
Accurate survival estimates are needed for guiding cancer control efforts in sub-Saharan Africa, but previous studies have been hampered by unknown biases due to excessive loss to follow-up (LTFU). In the African Breast Cancer-Disparities in Outcomes Study, a prospective breast cancer cohort study, we implemented active mobile health follow-up, telephoning each woman or her next-of-kin (NOK) trimonthly on her mobile phone to update information on her vital status. Dates of every contact with women/NOK were analyzed from diagnosis in 2014-2017 to the earliest of September 1, 2018, death, or 3 years postdiagnosis. The cumulative incidence of being LTFU was calculated considering deaths as competing events. In all, 1,490 women were followed for a median of 24.2 (interquartile range (IQR), 14.2-34.5) months, corresponding to 8,529 successful contacts (77% of total contacts) with the women/NOK. Median time between successful contacts was 3.0 (IQR, 3.0-3.7) months. In all, 71 women (5.3%) were LTFU at 3 years: 0.8% in Nigeria, 2.2% in Namibia, and 5.6% in Uganda. Because of temporary discontinuity of active follow-up, 20.3% of women were LTFU after 2 years in Zambia. The median time to study notification of a death was 9.1 (IQR, 3.9-14.0) weeks. Although the present study was not a randomized controlled trial, in this cancer cohort with active mobile health follow-up, LTFU was much lower than in previous studies and enabled estimation of up-to-date and reliable cancer survival.
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