Les Toop

2.4k total citations · 1 hit paper
48 papers, 1.6k citations indexed

About

Les Toop is a scholar working on Pathology and Forensic Medicine, General Health Professions and Public Health, Environmental and Occupational Health. According to data from OpenAlex, Les Toop has authored 48 papers receiving a total of 1.6k indexed citations (citations by other indexed papers that have themselves been cited), including 17 papers in Pathology and Forensic Medicine, 11 papers in General Health Professions and 8 papers in Public Health, Environmental and Occupational Health. Recurrent topics in Les Toop's work include Vitamin D Research Studies (17 papers), Primary Care and Health Outcomes (7 papers) and Vitamin C and Antioxidants Research (6 papers). Les Toop is often cited by papers focused on Vitamin D Research Studies (17 papers), Primary Care and Health Outcomes (7 papers) and Vitamin C and Antioxidants Research (6 papers). Les Toop collaborates with scholars based in New Zealand, United States and United Kingdom. Les Toop's co-authors include Debbie Waayer, Robert Scragg, Carlos A. Camargo, Carlene M.M. Lawes, Kay‐Tee Khaw, Alistair W. Stewart, John Sluyter, Judy Murphy, Dee Richards and Stephen T. Chambers and has published in prestigious journals such as American Journal of Clinical Nutrition, Clinical Infectious Diseases and Pain.

In The Last Decade

Les Toop

46 papers receiving 1.5k citations

Hit 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.

Effect of Monthly High-Dose Vitamin D Supplementation on Cardiovascular Disease in the Vitamin D Assessment Study

2017 358 citations Robert Scragg, Alistair W. Stewart et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Les Toop New Zealand	19	828	447	331	238	201	48	1.6k
Barrett T. Kitch United States	16	960 1.2×	411 0.9×	481 1.5×	227 1.0×	346 1.7×	23	2.7k
Magdalena Hoffmann Austria	11	684 0.8×	307 0.7×	107 0.3×	200 0.8×	78 0.4×	30	1.2k
Siti Setiati Indonesia	22	166 0.2×	110 0.2×	44 0.1×	118 0.5×	126 0.6×	138	1.7k
Long‐Teng Lee Taiwan	28	136 0.2×	206 0.5×	22 0.1×	591 2.5×	622 3.1×	62	2.3k
Laura Byham‐Gray United States	20	119 0.1×	592 1.3×	21 0.1×	329 1.4×	97 0.5×	126	2.6k
K. Wareham United Kingdom	19	84 0.1×	67 0.1×	75 0.2×	131 0.6×	131 0.7×	24	1.0k
Brian Schmotzer United States	21	96 0.1×	135 0.3×	19 0.1×	114 0.5×	231 1.1×	35	1.6k
Ramunë Jacobsen Denmark	19	202 0.2×	60 0.1×	16 0.0×	347 1.5×	258 1.3×	90	1.3k
Lorien S. Dalrymple United States	29	100 0.1×	72 0.2×	27 0.1×	137 0.6×	357 1.8×	57	2.8k
Alexander Kutz Switzerland	29	109 0.1×	286 0.6×	15 0.0×	207 0.9×	965 4.8×	108	2.7k

Countries citing papers authored by Les Toop

Since Specialization

Citations

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

Fields of papers citing papers by Les Toop

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Les Toop

This figure shows the co-authorship network connecting the top 25 collaborators of Les Toop. A scholar is included among the top collaborators of Les Toop 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 Les Toop. Les Toop 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

Stokes, Tim, Sue Crengle, Anthony Dowell, et al.. (2022). Developing a national primary care research network: a qualitative study of stakeholder views. Journal of Primary Health Care. 14(4). 338–344. 3 indexed citations

Camargo, Carlos A., Les Toop, John Sluyter, et al.. (2021). Effect of Monthly Vitamin D Supplementation on Preventing Exacerbations of Asthma or Chronic Obstructive Pulmonary Disease in Older Adults: Post Hoc Analysis of a Randomized Controlled Trial. Nutrients. 13(2). 521–521. 27 indexed citations

Wu, Zhenqiang, Carlos A. Camargo, John Sluyter, et al.. (2021). Effect of monthly vitamin D supplementation on antibiotic prescribing in older adults: a post hoc analysis of a randomized controlled trial. American Journal of Clinical Nutrition. 114(1). 314–321. 3 indexed citations

Malihi, Zarintaj, Zhenqiang Wu, John Sluyter, et al.. (2019). Risk factors for reporting adverse events and for study withdrawal in a population-based trial of vitamin D supplementation. The Journal of Steroid Biochemistry and Molecular Biology. 197. 105546–105546.

Wu, Zhenqiang, Carlos A. Camargo, John Sluyter, et al.. (2018). Association between serum 25-hydroxyvitamin D levels and self-reported chronic pain in older adults: A cross-sectional analysis from the ViDA study. The Journal of Steroid Biochemistry and Molecular Biology. 188. 17–22. 7 indexed citations

Wu, Zhenqiang, Carlos A. Camargo, Kay‐Tee Khaw, et al.. (2018). Effects of vitamin D supplementation on adherence to and persistence with long-term statin therapy: Secondary analysis from the randomized, double-blind, placebo-controlled ViDA study. Atherosclerosis. 273. 59–66. 16 indexed citations

Camargo, Carlos A., Kay‐Tee Khaw, Carlene M.M. Lawes, et al.. (2018). Cross-sectional associations of vitamin D status with asthma prevalence, exacerbations, and control in New Zealand adults. The Journal of Steroid Biochemistry and Molecular Biology. 188. 1–7. 12 indexed citations

Malihi, Zarintaj, Carlene M.M. Lawes, Zhenqiang Wu, et al.. (2018). Monthly high-dose vitamin D supplementation does not increase kidney stone risk or serum calcium: results from a randomized controlled trial. American Journal of Clinical Nutrition. 109(6). 1578–1587. 57 indexed citations

Bagshaw, Philip, Christopher Frampton, Robin Gauld, et al.. (2017). Pilot study of methods for assessing unmet secondary health care need in New Zealand.. PubMed. 130(1452). 23–38. 5 indexed citations

10.

Sluyter, John, Carlos A. Camargo, Alistair W. Stewart, et al.. (2017). Effect of monthly, high-dose, long-term vitamin D supplementation on central blood pressure parameters: A randomized controlled trial substudy. UCL Discovery (University College London). 62 indexed citations

11.

Toop, Les. (2017). Steps towards more integrated care in New Zealand: a general practice perspective. BJGP Open. 1(1). bjgpopen17X100845–bjgpopen17X100845. 7 indexed citations

12.

Khaw, Kay‐Tee, Alistair W. Stewart, Debbie Waayer, et al.. (2017). Effect of monthly high-dose vitamin D supplementation on falls and non-vertebral fractures: secondary and post-hoc outcomes from the randomised, double-blind, placebo-controlled ViDA trial. The Lancet Diabetes & Endocrinology. 5(6). 438–447. 143 indexed citations

13.

Mulder, Roger, Julia J. Rucklidge, & Les Toop. (2016). Restoring Study 329: Paroxetine neither effective nor safe for adolescents. Australian & New Zealand Journal of Psychiatry. 50(9). 922–923. 1 indexed citations

14.

Scragg, Robert, Debbie Waayer, Alistair W. Stewart, et al.. (2015). The Vitamin D Assessment (ViDA) Study: design of a randomized controlled trial of vitamin D supplementation for the prevention of cardiovascular disease, acute respiratory infection, falls and non-vertebral fractures. The Journal of Steroid Biochemistry and Molecular Biology. 164. 318–325. 81 indexed citations

15.

Hudson, Ben, Jonathan Williman, Lisa K. Stamp, et al.. (2015). Nortriptyline in knee osteoarthritis (NortIKA Study): study protocol for a randomised controlled trial. Trials. 16(1). 448–448. 5 indexed citations

16.

Mangin, Dee, David R. Murdoch, Sean M. Bagshaw, et al.. (2012). Chlamydia trachomatis Testing Sensitivity in Midstream Compared With First-Void Urine Specimens. The Annals of Family Medicine. 10(1). 50–53. 18 indexed citations

17.

Hudson, Ben, Les Toop, Dee Mangin, & John F. Pearson. (2011). Risk communication methods in hip fracture prevention: a randomised trial in primary care. British Journal of General Practice. 61(589). e469–e476. 14 indexed citations

18.

Vitry, Agnès, Joel Lexchin, Larry D. Sasich, et al.. (2008). Provision of information on regulatory authorities’ websites. Internal Medicine Journal. 38(7). 559–567. 15 indexed citations

19.

McGeoch, Graham, John G. Lainchbury, G. Ian Town, et al.. (2002). Plasma Brain Natriuretic Peptide After Long-Term Treatment for Heart Failure in General Practice. European Journal of Heart Failure. 4(4). 479–483. 42 indexed citations

20.

Toop, Les. (1998). Primary care: core values Patient centred primary care. BMJ. 316(7148). 1882–1883. 49 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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