Karthikeyan Ramanujam

2.2k total citations
33 papers, 652 citations indexed

About

Karthikeyan Ramanujam is a scholar working on Endocrine and Autonomic Systems, Nutrition and Dietetics and Pediatrics, Perinatology and Child Health. According to data from OpenAlex, Karthikeyan Ramanujam has authored 33 papers receiving a total of 652 indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Endocrine and Autonomic Systems, 10 papers in Nutrition and Dietetics and 6 papers in Pediatrics, Perinatology and Child Health. Recurrent topics in Karthikeyan Ramanujam's work include Child Nutrition and Water Access (10 papers), Circadian rhythm and melatonin (10 papers) and Infant Development and Preterm Care (6 papers). Karthikeyan Ramanujam is often cited by papers focused on Child Nutrition and Water Access (10 papers), Circadian rhythm and melatonin (10 papers) and Infant Development and Preterm Care (6 papers). Karthikeyan Ramanujam collaborates with scholars based in India, Canada and United States. Karthikeyan Ramanujam's co-authors include Seithikurippu R. Pandi‐Perumal, D. Warren Spence, Gregory M. Brown, Ahmed S. BaHammam, Deepa Burman, Jaime M. Monti, Ruifeng Cao, Gagandeep Kang, Venkata Raghava Mohan and Anuradha Bose and has published in prestigious journals such as Neuron, SHILAP Revista de lepidopterología and Clinical Infectious Diseases.

In The Last Decade

Karthikeyan Ramanujam

32 papers receiving 641 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Karthikeyan Ramanujam India	14	176	176	121	86	78	33	652
C. Pattinson Australia	12	87 0.5×	159 0.9×	91 0.8×	54 0.6×	55 0.7×	47	634
Greg J. Elder United Kingdom	14	80 0.5×	150 0.9×	244 2.0×	26 0.3×	144 1.8×	46	762
Gabi Ahne Germany	8	142 0.8×	97 0.6×	271 2.2×	348 4.0×	40 0.5×	8	883
M. Berger Germany	16	67 0.4×	183 1.0×	138 1.1×	23 0.3×	55 0.7×	40	648
Steven Wai Ho Chau Hong Kong	17	74 0.4×	215 1.2×	160 1.3×	21 0.2×	69 0.9×	48	915
Jennifer A. Nasser United States	14	75 0.4×	81 0.5×	170 1.4×	124 1.4×	208 2.7×	26	912
Katri Peuhkuri Finland	18	114 0.6×	325 1.8×	110 0.9×	114 1.3×	50 0.6×	25	1.2k
Xiaobei Zhu United States	11	136 0.8×	420 2.4×	247 2.0×	31 0.4×	32 0.4×	14	902
Kamalesh K. Gulia India	13	171 1.0×	368 2.1×	270 2.2×	11 0.1×	77 1.0×	37	763
Dale E. Rae South Africa	19	202 1.1×	351 2.0×	144 1.2×	89 1.0×	18 0.2×	51	992

Countries citing papers authored by Karthikeyan Ramanujam

Since Specialization

Citations

This map shows the geographic impact of Karthikeyan Ramanujam'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 Karthikeyan Ramanujam with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Karthikeyan Ramanujam more than expected).

Fields of papers citing papers by Karthikeyan Ramanujam

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Karthikeyan Ramanujam. 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 Karthikeyan Ramanujam. The network helps show where Karthikeyan Ramanujam may publish in the future.

Co-authorship network of co-authors of Karthikeyan Ramanujam

This figure shows the co-authorship network connecting the top 25 collaborators of Karthikeyan Ramanujam. A scholar is included among the top collaborators of Karthikeyan Ramanujam 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 Karthikeyan Ramanujam. Karthikeyan Ramanujam is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Ramanujam, Karthikeyan, et al.. (2025). Non-communicable diseases and risk factors profiling among geriatric population residing in Hyderabad city, India. SHILAP Revista de lepidopterología. 2(2). 100153–100153.

Ramanujam, Karthikeyan, et al.. (2023). Chronic Illness, Nutritional Status, and Factors Associated with Malnutrition among Various Age Groups Residing in Urban Areas of Telangana and Rural Areas of Andhra Pradesh. Nutrients. 15(20). 4470–4470. 4 indexed citations

Pandi‐Perumal, Seithikurippu R., Daniel P. Cardinali, Nevin F. W. Zaki, et al.. (2022). Timing is everything: Circadian rhythms and their role in the control of sleep. Frontiers in Neuroendocrinology. 66. 100978–100978. 26 indexed citations

Srinivasan, Manikandan, Kulandaipalayam Natarajan Sindhu, Karthikeyan Ramanujam, et al.. (2021). Factors Predicting Blood Culture Positivity in Children With Enteric Fever. The Journal of Infectious Diseases. 224(Supplement_5). S484–S493. 5 indexed citations

Mohan, Venkata Raghava, Manikandan Srinivasan, Bireshwar Sinha, et al.. (2021). Geographically Weighted Regression Modeling of Spatial Clustering and Determinants of Focal Typhoid Fever Incidence. The Journal of Infectious Diseases. 224(Supplement_5). S601–S611. 4 indexed citations

Karthikeyan, Arun S, Manikandan Srinivasan, Suman Kanungo, et al.. (2021). Antibiotics for Fever Among Children: Findings From the Surveillance for Enteric Fever in India Cohorts. The Journal of Infectious Diseases. 224(Supplement_5). S494–S501. 3 indexed citations

Karthikeyan, Arun S, Karthikeyan Ramanujam, Manoj Murhekar, et al.. (2021). Healthcare Utilization Survey in the Hybrid Model of the Surveillance for Enteric Fever in India (SEFI) Study: Processes, Monitoring, Results, and Challenges. The Journal of Infectious Diseases. 224(Supplement_5). S529–S539. 3 indexed citations

Karthikeyan, Arun S, Karthikeyan Ramanujam, Theresa Ryckman, et al.. (2021). Geographic Pattern of Typhoid Fever in India: A Model-Based Estimate of Cohort and Surveillance Data. The Journal of Infectious Diseases. 224(Supplement_5). S475–S483. 19 indexed citations

Brown, Gregory M., Karthikeyan Ramanujam, Seithikurippu R. Pandi‐Perumal, & Daniel P. Cardinali. (2021). Autism Spectrum Disorder patients may be susceptible to COVID-19 disease due to deficiency in melatonin. Medical Hypotheses. 149. 110544–110544. 13 indexed citations

10.

Koshy, Beena, Manikandan Srinivasan, Anuradha Bose, et al.. (2021). Developmental trends in early childhood and their predictors from an Indian birth cohort. BMC Public Health. 21(1). 1083–1083. 6 indexed citations

11.

Pandi‐Perumal, Seithikurippu R., Jaime M. Monti, Deepa Burman, et al.. (2020). Clarifying the role of sleep in depression: A narrative review. Psychiatry Research. 291. 113239–113239. 200 indexed citations

12.

Zaki, Nevin F. W., D. Warren Spence, P. Subramanian, et al.. (2020). Basic chronobiology: what do sleep physicians need to know?. SHILAP Revista de lepidopterología. 13(4). 256–266. 9 indexed citations

13.

Sindhu, Kulandaipalayam Natarajan, Karthikeyan Ramanujam, Ankita Henry, et al.. (2019). Low head circumference during early childhood and its predictors in a semi-urban settlement of Vellore, Southern India. BMC Pediatrics. 19(1). 182–182. 21 indexed citations

14.

N, Samarasimha Reddy, et al.. (2019). Exclusive breastfeeding practices in an urban settlement of Vellore, southern India: findings from the MAL-ED birth cohort. International Breastfeeding Journal. 14(1). 29–29. 13 indexed citations

15.

Ramanujam, Karthikeyan, D. Warren Spence, & Seithikurippu R. Pandi‐Perumal. (2019). The contribution of modern 24-hour society to the development of type 2 diabetes mellitus: the role of insufficient sleep. Sleep Science. 12(3). 227–231. 7 indexed citations

16.

Ramanujam, Karthikeyan, D. Warren Spence, Gregory M. Brown, & Seithikurippu R. Pandi‐Perumal. (2018). Are Type 2 Diabetes Mellitus and Depression Part of a Common Clock Genes Network?. SHILAP Revista de lepidopterología. 16(1). 4–4. 4 indexed citations

17.

Thomas, Rahul J., Karthikeyan Ramanujam, Saravanakumar Puthupalayam Kaliappan, et al.. (2015). Comparison of fieldworker interview and a pictorial diary method for recording morbidity of infants in semi-urban slums. BMC Public Health. 15(1). 43–43. 1 indexed citations

18.

John, Sushil, Rahul J. Thomas, Srujan Lam Sharma, et al.. (2014). Establishment of the MAL-ED Birth Cohort Study Site in Vellore, Southern India. Clinical Infectious Diseases. 59(suppl_4). S295–S299. 31 indexed citations

19.

Ramanujam, Karthikeyan, G. Marimuthu, D. Warren Spence, et al.. (2014). Should we listen to our clock to prevent type 2 diabetes mellitus?. Diabetes Research and Clinical Practice. 106(2). 182–190. 23 indexed citations

20.

Ramanujam, Karthikeyan, G. Marimuthu, Ahmed S. BaHammam, et al.. (2013). Per3 length polymorphism in patients with type 2 diabetes mellitus. Hormone Molecular Biology and Clinical Investigation. 18(3). 145–149. 18 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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