Retrospective cohort study

Retrospective cohort study - type of cohort study. Article “Retrospective cohort study” in English Wikipedia has 40.9 points for quality (as of July 1, 2025). The article contains 21 references and 8 sections.

This article has the best quality in German Wikipedia. However, this article is the most popular in English version.

Since the creation of article “Retrospective cohort study”, its content was written by 37 registered users of English Wikipedia and edited by 101 registered Wikipedia users in all languages.

The article is cited 147 times in English Wikipedia and cited 359 times in all languages.

The highest Authors Interest rank from 2001:

• Local (English): #37065 in November 2011
• Global: #67166 in February 2004

The highest popularity rank from 2008:

• Local (English): #2111 in December 2014
• Global: #8276 in December 2014

There are 9 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	German (de) Retrospektive Studie		41.2124
2	English (en) Retrospective cohort study		40.9038
3	Thai (th) งานศึกษาตามรุ่นย้อนหลัง		32.1781
4	Spanish (es) Estudio de cohortes retrospectivo		22.1202
5	Arabic (ar) دراسة حشدية رجعية		15.7268
6	Danish (da) Retrospektiv kohortestudie		12.5494
7	Catalan (ca) Estudi de cohorts retrospectiu		3.0406
8	Swedish (sv) Retrospektiv studie		1.4408
9	Serbian (sr) Ретроспекција		0.8618

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

The most popular language versions of the article "Retrospective cohort study" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Retrospective cohort study		1 881 157
2	German (de) Retrospektive Studie		258 900
3	Swedish (sv) Retrospektiv studie		133 264
4	Spanish (es) Estudio de cohortes retrospectivo		69 150
5	Thai (th) งานศึกษาตามรุ่นย้อนหลัง		31 912
6	Serbian (sr) Ретроспекција		16 969
7	Danish (da) Retrospektiv kohortestudie		9 871
8	Arabic (ar) دراسة حشدية رجعية		9 058
9	Catalan (ca) Estudi de cohorts retrospectiu		1 178

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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 "Retrospective cohort study" in June 2025

#	Language	Popularity award	Relative popularity
1	English (en) Retrospective cohort study		2 107
2	German (de) Retrospektive Studie		247
3	Spanish (es) Estudio de cohortes retrospectivo		161
4	Thai (th) งานศึกษาตามรุ่นย้อนหลัง		66
5	Serbian (sr) Ретроспекција		61
6	Swedish (sv) Retrospektiv studie		54
7	Arabic (ar) دراسة حشدية رجعية		32
8	Danish (da) Retrospektiv kohortestudie		27
9	Catalan (ca) Estudi de cohorts retrospectiu		10

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

Language versions of the article "Retrospective cohort 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) Retrospective cohort study		37
2	German (de) Retrospektive Studie		27
3	Swedish (sv) Retrospektiv studie		11
4	Spanish (es) Estudio de cohortes retrospectivo		8
5	Serbian (sr) Ретроспекција		7
6	Danish (da) Retrospektiv kohortestudie		4
7	Thai (th) งานศึกษาตามรุ่นย้อนหลัง		4
8	Catalan (ca) Estudi de cohorts retrospectiu		2
9	Arabic (ar) دراسة حشدية رجعية		1

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

Language versions of the article "Retrospective cohort study" with the highest AI in June 2025

#	Language	AI award	Relative AI
1	Thai (th) งานศึกษาตามรุ่นย้อนหลัง		1
2	Arabic (ar) دراسة حشدية رجعية		0
3	Catalan (ca) Estudi de cohorts retrospectiu		0
4	Danish (da) Retrospektiv kohortestudie		0
5	German (de) Retrospektive Studie		0
6	English (en) Retrospective cohort study		0
7	Spanish (es) Estudio de cohortes retrospectivo		0
8	Serbian (sr) Ретроспекција		0
9	Swedish (sv) Retrospektiv studie		0

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

Language versions of the article "Retrospective cohort study" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	English (en) Retrospective cohort study		147
2	Serbian (sr) Ретроспекција		74
3	German (de) Retrospektive Studie		48
4	Arabic (ar) دراسة حشدية رجعية		31
5	Thai (th) งานศึกษาตามรุ่นย้อนหลัง		29
6	Swedish (sv) Retrospektiv studie		16
7	Catalan (ca) Estudi de cohorts retrospectiu		7
8	Spanish (es) Estudio de cohortes retrospectivo		4
9	Danish (da) Retrospektiv kohortestudie		3

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#	Language	Value
ar	Arabic دراسة حشدية رجعية
ca	Catalan Estudi de cohorts retrospectiu
da	Danish Retrospektiv kohortestudie
de	German Retrospektive Studie
en	English Retrospective cohort study
es	Spanish Estudio de cohortes retrospectivo
sr	Serbian Ретроспекција
sv	Swedish Retrospektiv studie
th	Thai งานศึกษาตามรุ่นย้อนหลัง

Best Rank

English: #2111 12.2014

Global: #8276 12.2014

Best Rank

English: #37065 11.2011

Global: #67166 02.2004

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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