Case–control study

Case-control study - type of observational study comparing two existing groups differing in outcome. Article “Case–control study” in English Wikipedia has 38.7 points for quality (as of July 1, 2025). The article contains 24 references and 11 sections.

In this language version of Wikipedia the article has the best quality. Also, this article is the most popular in that (English) language version.

Since the creation of article “Case–control study”, its content was written by 119 registered users of English Wikipedia and edited by 348 registered Wikipedia users in all languages.

The article is cited 463 times in English Wikipedia and cited 1697 times in all languages.

The highest Authors Interest rank from 2001:

• Local (English): #22916 in December 2003
• Global: #24764 in December 2003

The highest popularity rank from 2008:

• Local (English): #22876 in October 2014
• Global: #36650 in October 2014

There are 20 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	English (en) Case–control study		38.7318
2	Thai (th) งานศึกษามีกลุ่มควบคุม		37.7518
3	Ukrainian (uk) Дослідження «випадок-контроль»		35.3626
4	Finnish (fi) Tapaus-verrokkitutkimus		34.9719
5	Greek (el) Μελέτη πασχόντων–μαρτύρων		33.5105
6	German (de) Fall-Kontroll-Studie		27.2641
7	Spanish (es) Estudio de casos y controles		25.2853
8	Arabic (ar) دراسة الحالات والشواهد		20.7252
9	Catalan (ca) Estudi de casos i controls		19.8609
10	Chinese (zh) 病例對照研究		19.4768

More...

The following table shows the most popular language versions of the article.

The most popular language versions of the article "Case–control study" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Case–control study		3 592 205
2	Spanish (es) Estudio de casos y controles		849 500
3	German (de) Fall-Kontroll-Studie		306 063
4	Japanese (ja) 症例対照研究		276 365
5	French (fr) Étude cas-témoins		257 576
6	Dutch (nl) Patiënt-controleonderzoek		118 500
7	Chinese (zh) 病例對照研究		106 655
8	Indonesian (id) Kajian kasus–kontrol		77 373
9	Russian (ru) Исследование «случай — контроль»		74 897
10	Swedish (sv) Fall-referentstudie		68 057

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The following table shows the language versions of the article with the highest popularity in the last month.

The most popular language versions of the article "Case–control study" in June 2025

#	Language	Popularity award	Relative popularity
1	English (en) Case–control study		2 927
2	Spanish (es) Estudio de casos y controles		464
3	Russian (ru) Исследование «случай — контроль»		318
4	Japanese (ja) 症例対照研究		314
5	French (fr) Étude cas-témoins		312
6	German (de) Fall-Kontroll-Studie		276
7	Chinese (zh) 病例對照研究		245
8	Greek (el) Μελέτη πασχόντων–μαρτύρων		62
9	Finnish (fi) Tapaus-verrokkitutkimus		46
10	Dutch (nl) Patiënt-controleonderzoek		44

More...

The following table shows the language versions of the article with the highest Authors’ Interest.

Language versions of the article "Case–control study" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) Case–control study		119
2	German (de) Fall-Kontroll-Studie		52
3	French (fr) Étude cas-témoins		33
4	Spanish (es) Estudio de casos y controles		26
5	Japanese (ja) 症例対照研究		18
6	Dutch (nl) Patiënt-controleonderzoek		16
7	Chinese (zh) 病例對照研究		12
8	Swedish (sv) Fall-referentstudie		11
9	Finnish (fi) Tapaus-verrokkitutkimus		10
10	Russian (ru) Исследование «случай — контроль»		9

More...

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

Language versions of the article "Case–control study" with the highest AI in June 2025

#	Language	AI award	Relative AI
1	Thai (th) งานศึกษามีกลุ่มควบคุม		1
2	Arabic (ar) دراسة الحالات والشواهد		0
3	Catalan (ca) Estudi de casos i controls		0
4	German (de) Fall-Kontroll-Studie		0
5	Greek (el) Μελέτη πασχόντων–μαρτύρων		0
6	English (en) Case–control study		0
7	Spanish (es) Estudio de casos y controles		0
8	Estonian (et) Juhtkontrolluuring		0
9	Persian (fa) مطالعه موردشاهدی		0
10	Finnish (fi) Tapaus-verrokkitutkimus		0

More...

The following table shows the language versions of the article with the highest number of citations.

Language versions of the article "Case–control study" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	English (en) Case–control study		463
2	French (fr) Étude cas-témoins		426
3	Chinese (zh) 病例對照研究		142
4	Japanese (ja) 症例対照研究		141
5	Persian (fa) مطالعه موردشاهدی		111
6	Catalan (ca) Estudi de casos i controls		76
7	Korean (ko) 사례 대조 연구		72
8	German (de) Fall-Kontroll-Studie		57
9	Spanish (es) Estudio de casos y controles		48
10	Arabic (ar) دراسة الحالات والشواهد		39

More...

#	Language	Value
ar	Arabic دراسة الحالات والشواهد
ca	Catalan Estudi de casos i controls
de	German Fall-Kontroll-Studie
el	Greek Μελέτη πασχόντων–μαρτύρων
en	English Case–control study
es	Spanish Estudio de casos y controles
et	Estonian Juhtkontrolluuring
fa	Persian مطالعه موردشاهدی
fi	Finnish Tapaus-verrokkitutkimus
fr	French Étude cas-témoins
id	Indonesian Kajian kasus–kontrol
ja	Japanese 症例対照研究
ko	Korean 사례 대조 연구
nl	Dutch Patiënt-controleonderzoek
no	Norwegian Kasus-kontrollstudie
ru	Russian Исследование «случай — контроль»
sv	Swedish Fall-referentstudie
th	Thai งานศึกษามีกลุ่มควบคุม
uk	Ukrainian Дослідження «випадок-контроль»
zh	Chinese 病例對照研究

Best Rank

English: #22876 10.2014

Global: #36650 10.2014

Best Rank

English: #22916 12.2003

Global: #24764 12.2003

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The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 44 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2025. When calculating current popularity and AI of articles data from June 2025 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2025... More information