Kai Sievers

2.4k total citations · 1 hit paper
62 papers, 1.8k citations indexed

About

Kai Sievers is a scholar working on Rheumatology, Immunology and Surgery. According to data from OpenAlex, Kai Sievers has authored 62 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 19 papers in Rheumatology, 10 papers in Immunology and 7 papers in Surgery. Recurrent topics in Kai Sievers's work include Rheumatoid Arthritis Research and Therapies (13 papers), Musculoskeletal pain and rehabilitation (7 papers) and Systemic Lupus Erythematosus Research (6 papers). Kai Sievers is often cited by papers focused on Rheumatoid Arthritis Research and Therapies (13 papers), Musculoskeletal pain and rehabilitation (7 papers) and Systemic Lupus Erythematosus Research (6 papers). Kai Sievers collaborates with scholars based in Finland, Germany and Denmark. Kai Sievers's co-authors include Arpo Aromaa, Paul Knekt, Olli Impivaara, Matti Mäkelä, P Ahvonen, Kimmo Aho, Markku Heliövaara, A Tiilikainen, A Lassus and Markku Heliövaara and has published in prestigious journals such as The Lancet, The Journal of Immunology and American Journal of Epidemiology.

In The Last Decade

Kai Sievers

61 papers receiving 1.6k 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.

Prevalence, Determinants, and Consequences of Chronic Neck Pain in Finland

1991 421 citations Matti Mäkelä, Markku Heliövaara et al. American Journal of Epidemiology profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Kai Sievers Finland	17	690	569	383	345	171	62	1.8k
E Atra Brazil	17	391 0.6×	674 1.2×	257 0.7×	288 0.8×	148 0.9×	59	1.8k
Jean‐Pierre Valat France	23	901 1.3×	566 1.0×	566 1.5×	561 1.6×	90 0.5×	69	1.9k
T. L. Vischer Switzerland	23	607 0.9×	550 1.0×	121 0.3×	165 0.5×	506 3.0×	70	2.3k
A Helewa Canada	19	290 0.4×	440 0.8×	120 0.3×	97 0.3×	89 0.5×	26	954
Thao Pham France	31	295 0.4×	1.6k 2.8×	245 0.6×	485 1.4×	492 2.9×	143	2.9k
Carlos A. Agudelo United States	21	215 0.3×	600 1.1×	123 0.3×	318 0.9×	65 0.4×	77	1.4k
John I. Reed United States	11	351 0.5×	892 1.6×	46 0.1×	683 2.0×	61 0.4×	13	1.8k
Philip J. Hashkes Israel	29	240 0.3×	311 0.5×	94 0.2×	494 1.4×	415 2.4×	90	2.4k
Harry Robinson United States	14	62 0.1×	776 1.4×	489 1.3×	533 1.5×	171 1.0×	28	2.0k
Enrico Colli Italy	32	170 0.2×	555 1.0×	195 0.5×	265 0.8×	94 0.5×	79	2.8k

Countries citing papers authored by Kai Sievers

Since Specialization

Citations

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

Fields of papers citing papers by Kai Sievers

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Kai Sievers

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

1.

Heliövaara, Markku, et al.. (1993). Musculoskeletal disorders as determinants of disability in Finns aged 30 years or more. Journal of Clinical Epidemiology. 46(6). 549–559. 113 indexed citations

2.

Heliövaara, Markku, Matti Mäkelä, Olli Impivaara, et al.. (1993). Association of overweight, trauma and workload with coxarthrosis: A health survey of 7,217 persons. Acta Orthopaedica Scandinavica. 64(5). 513–518. 105 indexed citations

3.

Mäkelä, Matti, Markku Heliövaara, Kai Sievers, et al.. (1991). Prevalence, Determinants, and Consequences of Chronic Neck Pain in Finland. American Journal of Epidemiology. 134(11). 1356–1367. 421 indexed citations breakdown →

4.

Aho, Kimmo, et al.. (1989). Clinical arthritis associated with positive radiological and serological findings in Finnish adults. Rheumatology International. 9(1). 7–11. 29 indexed citations

5.

Heliövaara, Markku, Kai Sievers, Olli Impivaara, et al.. (1989). Descriptive Epidemiology and Public Health Aspects of Low Back Pain. Annals of Medicine. 21(5). 327–333. 100 indexed citations

6.

Sievers, Kai, et al.. (1988). Musculoskeletal disorders and disability in Finland. Scandinavian Journal of Rheumatology. 17(sup67). 86–89. 15 indexed citations

7.

Heliövaara, Markku, Olli Impivaara, Kai Sievers, et al.. (1987). Lumbar disc syndrome in Finland.. Journal of Epidemiology & Community Health. 41(3). 251–258. 121 indexed citations

8.

Klaukka, Timo, et al.. (1982). Epidemiology of rheumatic diseases in Finland in 1964-76.. PubMed. 47. 5–13. 30 indexed citations

9.

Sievers, Kai, et al.. (1982). Rheumatic symptoms in the middle-aged population in southwestern Finland.. PubMed. 47. 15–29. 46 indexed citations

10.

Sievers, Kai, et al.. (1980). Combined Therapy of Rheumatoid Arthritis with Gold and Chloroquine: II Evaluation of the Side Effects. Scandinavian Journal of Rheumatology. 9(1). 56–64. 1 indexed citations

11.

Takala, Jorma, et al.. (1979). A Multiphasic Screening Programme at the Health Centre Level: the Säkylä-Köyliö Project: Variables, Methods and Participation. Scandinavian Journal of Social Medicine. 7(2). 87–91. 5 indexed citations

12.

Sievers, Kai, Jarmo Takala, & Kimmo Aho. (1977). Association of bacteriuria and rheumatoid factors in a population sample. Scandinavian Journal of Rheumatology. 6(1). 45–48. 3 indexed citations

13.

Takala, Jorma, et al.. (1977). Screening for and Treatment of Bacteriuria in a Middle‐aged Female Population. Acta Medica Scandinavica. 202(1-6). 69–73. 8 indexed citations

14.

Rimpelä, Matti, et al.. (1974). Pohjois-Karjalan projektin peruskartoitus. Sosiaalilääketieteellinen Aikakauslehti. 11(2). 97–106. 3 indexed citations

15.

K, Aho, H Isomäki, V. Laine, et al.. (1972). Diagnostic and Activity Criteria of Rheumatoid Arthritis Evaluated with Factor Analysis. Scandinavian Journal of Rheumatology. 1(3). 101–108. 1 indexed citations

16.

Sievers, Kai, et al.. (1968). Cerebral Vasculitis Visualized by Angiography in Juvenile Rheumatoid Arthritis Simulating Brain Tumor. Acta Rheumatologica Scandinavica. 14(1-4). 222–232. 23 indexed citations

17.

Sievers, Kai. (1965). The Rheumatoid Factor in Definite Rheumatoid Arthritis: An Analysis of 1279 Adult Patients, with a Follow-up Study. Acta Rheumatologica Scandinavica. 10(sup9). 3–121. 30 indexed citations

18.

Sievers, Kai, et al.. (1964). LIVER FUNCTION IN RHEUMATOID ARTHRITIS.. PubMed. 53. 53–60. 4 indexed citations

19.

Sievers, Kai, et al.. (1963). Intra-Articular Osmic Acid in Rheumatoid Arthritis. Acta Rheumatologica Scandinavica. 9(1-4). 20–27. 21 indexed citations

20.

Lüderitz, O., D. K. Hammer, F. Goebel, Kai Sievers, & Otto Westphal. (1958). [Inactivation of the endotoxic activity of bacterial lipopolysaccharides in serum plasma and whole blood of horses].. PubMed. 13B(9). 566–71. 3 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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