Delayed sleep phase disorder

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Delayed sleep phase disorder

Quality:

Delayed sleep phase disorder - chronic mismatch between a person's normal daily rhythm, compared to other people and societal norms. Article “Delayed sleep phase disorder” in Simple English Wikipedia has 17.7 points for quality (as of July 1, 2025). The article contains 2 references and 1 sections.

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

Since the creation of article “Delayed sleep phase disorder”, its content was written by 6 registered users of Simple English Wikipedia and edited by 695 registered Wikipedia users in all languages.

The highest Authors Interest rank from 2001:

  • Local (Simple English): #587 in September 2014
  • Global: #10571 in May 2003

The highest popularity rank from 2008:

  • Local (Simple English): #21637 in November 2015
  • Global: #13565 in December 2018

There are 22 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.

Languages with the highest quality

#LanguageQuality gradeQuality score
1English (en)
Delayed sleep phase disorder
72.9369
2Portuguese (pt)
Síndrome do atraso das fases do sono
61.9099
3German (de)
Schlafphasensyndrom
48.1804
4Chinese (zh)
睡眠相位后移症候群
45.6355
5Thai (th)
ภาวะการนอนหลับล่าช้า
43.8014
6Ukrainian (uk)
Синдром затримки фази сну
41.5698
7Finnish (fi)
Viivästynyt unijakso
38.1865
8Polish (pl)
Zespół opóźnionej fazy snu
37.8524
9Russian (ru)
Синдром задержки фазы сна
35.416
10Spanish (es)
Síndrome de la fase del sueño retrasada
27.8873
More...

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

Most popular in all the time

The most popular language versions of the article "Delayed sleep phase disorder" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Delayed sleep phase disorder
5 681 299
2Japanese (ja)
睡眠相後退症候群
553 600
3Spanish (es)
Síndrome de la fase del sueño retrasada
543 409
4Russian (ru)
Синдром задержки фазы сна
280 086
5German (de)
Schlafphasensyndrom
274 291
6Chinese (zh)
睡眠相位后移症候群
249 855
7Portuguese (pt)
Síndrome do atraso das fases do sono
182 953
8Dutch (nl)
Vertraagde-slaapfasesyndroom
169 356
9Polish (pl)
Zespół opóźnionej fazy snu
134 358
10French (fr)
Syndrome de retard de phase du sommeil
106 197
More...

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

Most popular in June 2025

The most popular language versions of the article "Delayed sleep phase disorder" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
Delayed sleep phase disorder
14 835
2Russian (ru)
Синдром задержки фазы сна
2 360
3Japanese (ja)
睡眠相後退症候群
959
4German (de)
Schlafphasensyndrom
942
5Chinese (zh)
睡眠相位后移症候群
870
6Dutch (nl)
Vertraagde-slaapfasesyndroom
457
7French (fr)
Syndrome de retard de phase du sommeil
421
8Polish (pl)
Zespół opóźnionej fazy snu
405
9Spanish (es)
Síndrome de la fase del sueño retrasada
376
10Hebrew (he)
תסמונת פאזת השינה הדחויה
271
More...

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

The highest AI

Language versions of the article "Delayed sleep phase disorder" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Delayed sleep phase disorder
277
2German (de)
Schlafphasensyndrom
60
3Dutch (nl)
Vertraagde-slaapfasesyndroom
60
4Chinese (zh)
睡眠相位后移症候群
45
5Japanese (ja)
睡眠相後退症候群
37
6Spanish (es)
Síndrome de la fase del sueño retrasada
32
7Hebrew (he)
תסמונת פאזת השינה הדחויה
29
8Italian (it)
Sindrome da sonno posticipato
28
9French (fr)
Syndrome de retard de phase du sommeil
21
10Portuguese (pt)
Síndrome do atraso das fases do sono
19
More...

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

The highest AI in June 2025

Language versions of the article "Delayed sleep phase disorder" with the highest AI in June 2025
#LanguageAI awardRelative AI
1English (en)
Delayed sleep phase disorder
1
2Polish (pl)
Zespół opóźnionej fazy snu
1
3Arabic (ar)
اضطراب طور النوم المتأخر
0
4Azerbaijani (az)
Gecikmiş yuxu mərhələsi sindromu
0
5Czech (cs)
Syndrom odkládané spánkové fáze
0
6Danish (da)
Socialt jetlag
0
7German (de)
Schlafphasensyndrom
0
8Spanish (es)
Síndrome de la fase del sueño retrasada
0
9Persian (fa)
اختلال تأخیر در فاز خواب
0
10Finnish (fi)
Viivästynyt unijakso
0
More...

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

The highest CI

Language versions of the article "Delayed sleep phase disorder" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1English (en)
Delayed sleep phase disorder
194
2Arabic (ar)
اضطراب طور النوم المتأخر
174
3Chinese (zh)
睡眠相位后移症候群
135
4Italian (it)
Sindrome da sonno posticipato
109
5Persian (fa)
اختلال تأخیر در فاز خواب
68
6Ukrainian (uk)
Синдром затримки фази сну
58
7Japanese (ja)
睡眠相後退症候群
47
8Russian (ru)
Синдром задержки фазы сна
44
9French (fr)
Syndrome de retard de phase du sommeil
42
10Dutch (nl)
Vertraagde-slaapfasesyndroom
42
More...

Scores

Estimated value for Wikipedia:
Simple English:
Global:
Popularity in June 2025:
Simple English:
Global:
Popularity in all years:
Simple English:
Global:
Authors in June 2025:
Simple English:
Global:
Registered authors in all years:
Simple English:
Global:
Citations:
Simple English:
Global:

Quality measures

Interwikis

#LanguageValue
arArabic
اضطراب طور النوم المتأخر
azAzerbaijani
Gecikmiş yuxu mərhələsi sindromu
csCzech
Syndrom odkládané spánkové fáze
daDanish
Socialt jetlag
deGerman
Schlafphasensyndrom
enEnglish
Delayed sleep phase disorder
esSpanish
Síndrome de la fase del sueño retrasada
faPersian
اختلال تأخیر در فاز خواب
fiFinnish
Viivästynyt unijakso
frFrench
Syndrome de retard de phase du sommeil
heHebrew
תסמונת פאזת השינה הדחויה
itItalian
Sindrome da sonno posticipato
jaJapanese
睡眠相後退症候群
koKorean
지연성 수면주기장애
nlDutch
Vertraagde-slaapfasesyndroom
plPolish
Zespół opóźnionej fazy snu
ptPortuguese
Síndrome do atraso das fases do sono
ruRussian
Синдром задержки фазы сна
simpleSimple English
Delayed sleep phase disorder
thThai
ภาวะการนอนหลับล่าช้า
ukUkrainian
Синдром затримки фази сну
zhChinese
睡眠相位后移症候群

Popularity rank trends

Best Rank Simple English:
#21637
11.2015
Global:
#13565
12.2018

AI rank trends

Best Rank Simple English:
#587
09.2014
Global:
#10571
05.2003

Local AI rank history

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on Delayed sleep phase disorder from Wikipedia articles about Circadian rhythm sleep disorder, Attention deficit hyperactivity disorder, Night owl, Obsessive-compulsive disorder and Insomnia. Whereas reading the article about Delayed sleep phase disorder people most often go to Wikipedia articles on Non-24-hour sleep-wake disorder, Orexin, Circadian rhythm, Night owl and Orexin antagonist.

Cumulative results of quality and popularity of the Wikipedia article

List of Wikipedia articles in different languages (starting with the most popular):

News from 16 March 2026

On 16 March 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: 98th Academy Awards, Michael B. Jordan, Sinners, Jessie Buckley, Paul Thomas Anderson, Sean Penn, One Battle After Another, Amy Madigan, Hamnet, Timothée Chalamet.

In Simple English Wikipedia the most popular articles on that day were: Black, Alba Baptista, List of European countries, XXXTentacion, Golden Edge, SOLID (object-oriented design), Strait of Hormuz, Megan Skiendiel, Manon Bannerman, Chris Evans.

About WikiRank

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