Chika Hayashi

5.9k total citations · 5 hit papers
39 papers, 3.1k citations indexed

About

Chika Hayashi is a scholar working on Infectious Diseases, General Health Professions and Nutrition and Dietetics. According to data from OpenAlex, Chika Hayashi has authored 39 papers receiving a total of 3.1k indexed citations (citations by other indexed papers that have themselves been cited), including 15 papers in Infectious Diseases, 13 papers in General Health Professions and 13 papers in Nutrition and Dietetics. Recurrent topics in Chika Hayashi's work include HIV/AIDS Research and Interventions (14 papers), Child Nutrition and Water Access (13 papers) and Global Maternal and Child Health (6 papers). Chika Hayashi is often cited by papers focused on HIV/AIDS Research and Interventions (14 papers), Child Nutrition and Water Access (13 papers) and Global Maternal and Child Health (6 papers). Chika Hayashi collaborates with scholars based in United States, Switzerland and United Kingdom. Chika Hayashi's co-authors include Julia Krasevec, Elaine Borghi, Mercedes de Onís, Umar Serajuddin, Monika Blössner, Richard Kumapley, Mehra, Robert E. Black, Joy E Lawn and Diana Estevez and has published in prestigious journals such as The Lancet, The Journal of Clinical Endocrinology & Metabolism and Journal of Nutrition.

In The Last Decade

Chika Hayashi

36 papers receiving 3.0k citations

Hit Papers

5 papers align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

National, regional, and worldwide estimates of low birthweight in 2015, with trends from 2000: a systematic analysis

2019 616 citations Hannah Blencowe, Julia Krasevec et al. profile →
Levels and trends in child malnutrition. UNICEF/ WHO / World Bank Group joint child malnutrition estimates: key findings of the 2017 edition.

2017 501 citations Chika Hayashi, Julia Krasevec et al. profile →
2018 Global Nutrition Report: Shining a light to spur action on nutrition

2018 369 citations Zulfiqar A Bhutta, Chika Hayashi et al. profile →
Prevalence thresholds for wasting, overweight and stunting in children under 5 years

2018 259 citations Mercedes de Onís, Elaine Borghi et al. Public Health Nutrition profile →
National, regional, and global estimates of low birthweight in 2020, with trends from 2000: a systematic analysis

2024 42 citations Yemisrach B. Okwaraji, Julia Krasevec et al. The Lancet profile →

Peers

Chika Hayashi

PPCH

GHP

PHEOH

Honorati Masanja Tanzania

Christopher R. Sudfeld United States

Robert Ntozini United States

Christine P. Stewart United States

Suzanne Filteau United Kingdom

Meera Shekar United States

Abraham Hodgson Ghana

Dominique Roberfroid Belgium

Afework Mulugeta Ethiopia

Lisa B. Haddad United States

Honorati Masanja Tanzania

Chika Hayashi

1.0k ×0.8

1.6k ×1.3

PPCH

653 ×0.8

GHP

939 ×1.8

PHEOH

349 ×0.8

Citations per year, relative to Chika Hayashi Chika Hayashi (= 1×) peers Honorati Masanja

Countries citing papers authored by Chika Hayashi

Since Specialization

Citations

This map shows the geographic impact of Chika Hayashi's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Chika Hayashi with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Chika Hayashi more than expected).

Fields of papers citing papers by Chika Hayashi

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Chika Hayashi. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Chika Hayashi. The network helps show where Chika Hayashi may publish in the future.

Co-authorship network of co-authors of Chika Hayashi

This figure shows the co-authorship network connecting the top 25 collaborators of Chika Hayashi. A scholar is included among the top collaborators of Chika Hayashi based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Chika Hayashi. Chika Hayashi is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Pries, Alissa M., Vrinda Mehra, Giles Hanley‐Cook, et al.. (2025). Healthy diet metrics for children and adolescents and their suitability for global monitoring: a critical review. medRxiv.

Karakochuk, Crystal D, Omar Dary, Monica C Flores-Urrutia, et al.. (2024). Emerging Evidence and Critical Issues with the Use of Single-Drop Capillary Blood for the Measurement of Hemoglobin Concentration in Population-Level Anemia Surveys. Advances in Nutrition. 15(10). 100290–100290. 4 indexed citations

Okwaraji, Yemisrach B., Julia Krasevec, Ellen Bradley, et al.. (2024). National, regional, and global estimates of low birthweight in 2020, with trends from 2000: a systematic analysis. The Lancet. 403(10431). 1071–1080. 42 indexed citations breakdown →

Borghi, Elaine, Monica C Flores-Urrutia, Julianne Williams, et al.. (2022). Estimating Childhood Stunting and Overweight Trends in the European Region from Sparse Longitudinal Data. Journal of Nutrition. 152(7). 1773–1782.

Frongillo, Edward A., Maryah Stella Fram, Hala Ghattas, et al.. (2022). Development, Validity, and Cross-Context Equivalence of the Child Food Insecurity Experiences Scale for Assessing Food Insecurity of School-Age Children and Adolescents. Journal of Nutrition. 152(9). 2135–2144. 19 indexed citations

Lelijveld, Natasha, Stephanie V. Wrottesley, Zulfiqar A Bhutta, et al.. (2022). Towards standardised and valid anthropometric indicators of nutritional status in middle childhood and adolescence. The Lancet Child & Adolescent Health. 6(10). 738–746. 11 indexed citations

Amouzou, Agbessi, Hannah H. Leslie, Malathi Ram, et al.. (2019). Advances in the measurement of coverage for RMNCH and nutrition: from contact to effective coverage. BMJ Global Health. 4(Suppl 4). e001297–e001297. 88 indexed citations

Onís, Mercedes de, Elaine Borghi, Mary Arimond, et al.. (2018). Prevalence thresholds for wasting, overweight and stunting in children under 5 years. Public Health Nutrition. 22(1). 175–179. 259 indexed citations breakdown →

Hutin, Yvan, Daniel Low‐Beer, Isabel Bergeri, et al.. (2017). Viral Hepatitis Strategic Information to Achieve Elimination by 2030: Key Elements for HIV Program Managers. JMIR Public Health and Surveillance. 3(4). e91–e91. 18 indexed citations

10.

Idele, Priscilla, et al.. (2017). Prevention of Mother-to-Child Transmission of HIV and Paediatric HIV Care and Treatment Monitoring: From Measuring Process to Impact and Elimination of Mother-to-Child Transmission of HIV. AIDS and Behavior. 21(S1). 23–33. 19 indexed citations

11.

Low‐Beer, Daniel, et al.. (2017). Monitoring HIV Treatment and the Health Sector Cascade: From Treatment Numbers to Impact. AIDS and Behavior. 21(S1). 15–22. 8 indexed citations

12.

Hayashi, Chika, Julia Krasevec, Richard Kumapley, et al.. (2017). Levels and trends in child malnutrition. UNICEF/ WHO / World Bank Group joint child malnutrition estimates: key findings of the 2017 edition.. 501 indexed citations breakdown →

13.

Nguyen, Van Thi Thuy, et al.. (2017). Monitoring Prevention Impact of Mother-to-Child Transmission of HIV in Concentrated Epidemics With Program and Survey Data. JMIR Public Health and Surveillance. 3(4). e76–e76. 4 indexed citations

14.

Taylor, Melanie, Lori M. Newman, Naoko Ishikawa, et al.. (2017). Elimination of mother-to-child transmission of HIV and Syphilis (EMTCT): Process, progress, and program integration. PLoS Medicine. 14(6). e1002329–e1002329. 59 indexed citations

15.

Rollins, Nigel, Renaud Becquet, Joanna Orne‐Gliemann, et al.. (2014). Defining and Analyzing Retention-in-Care Among Pregnant and Breastfeeding HIV-Infected Women. JAIDS Journal of Acquired Immune Deficiency Syndromes. 67(Supplement 2). S150–S156. 44 indexed citations

16.

Mandala, Justin, et al.. (2012). Use of service data to inform pediatric HIV-free survival following prevention of mother-to-child transmission programs in rural Malawi. BMC Public Health. 12(1). 405–405. 3 indexed citations

17.

Mahy, Mary, John Stover, Karusa Kiragu, et al.. (2010). What will it take to achieve virtual elimination of mother-to-child transmission of HIV? An assessment of current progress and future needs. Sexually Transmitted Infections. 86(Suppl 2). ii48–ii55. 89 indexed citations

18.

Kobayashi, Hisato, Hitoshi Hiura, Rosalind M. John, et al.. (2009). DNA methylation errors at imprinted loci after assisted conception originate in the parental sperm. European Journal of Human Genetics. 17(12). 1582–1591. 152 indexed citations

19.

Sugawara, Junichi, Minori Mitsui‐Saito, Tetsuro Hoshiai, et al.. (2005). Circulating Endothelial Progenitor Cells during Human Pregnancy. The Journal of Clinical Endocrinology & Metabolism. 90(3). 1845–1848. 61 indexed citations

20.

Sugawara, Junichi, Minori Mitsui‐Saito, Chika Hayashi, et al.. (2005). Decrease and Senescence of Endothelial Progenitor Cells in Patients with Preeclampsia. The Journal of Clinical Endocrinology & Metabolism. 90(9). 5329–5332. 90 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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