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 17.4 points for quality (as of July 1, 2026). 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 716 registered Wikipedia users in all languages.

The highest Authors Interest rank from 2001:

  • Local (Simple English): #586 in September 2014
  • Global: #10589 in May 2003

The highest popularity rank from 2008:

  • Local (Simple English): #21703 in November 2015
  • Global: #13581 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, 2026 (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
71.7458
2Portuguese (pt)
Síndrome do atraso das fases do sono
61.4806
3German (de)
Schlafphasensyndrom
47.1467
4Chinese (zh)
睡眠相位后移症候群
45.5621
5Thai (th)
ภาวะการนอนหลับล่าช้า
42.6188
6Ukrainian (uk)
Синдром затримки фази сну
40.8193
7Finnish (fi)
Viivästynyt unijakso
38.2339
8Polish (pl)
Zespół opóźnionej fazy snu
36.6539
9Russian (ru)
Синдром задержки фазы сна
35.2954
10Spanish (es)
Síndrome de la fase del sueño retrasada
27.6238
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
5 834 428
2Japanese (ja)
睡眠相後退症候群
562 681
3Spanish (es)
Síndrome de la fase del sueño retrasada
548 899
4Russian (ru)
Синдром задержки фазы сна
309 651
5German (de)
Schlafphasensyndrom
285 614
6Chinese (zh)
睡眠相位后移症候群
261 825
7Portuguese (pt)
Síndrome do atraso das fases do sono
187 101
8Dutch (nl)
Vertraagde-slaapfasesyndroom
173 869
9Polish (pl)
Zespół opóźnionej fazy snu
140 348
10French (fr)
Syndrome de retard de phase du sommeil
110 668
More...

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

Most popular in June 2026

The most popular language versions of the article "Delayed sleep phase disorder" in June 2026
#LanguagePopularity awardRelative popularity
1English (en)
Delayed sleep phase disorder
9 843
2Russian (ru)
Синдром задержки фазы сна
1 333
3Chinese (zh)
睡眠相位后移症候群
1 320
4Portuguese (pt)
Síndrome do atraso das fases do sono
1 273
5German (de)
Schlafphasensyndrom
630
6Japanese (ja)
睡眠相後退症候群
458
7Polish (pl)
Zespół opóźnionej fazy snu
306
8French (fr)
Syndrome de retard de phase du sommeil
228
9Spanish (es)
Síndrome de la fase del sueño retrasada
226
10Hebrew (he)
תסמונת פאזת השינה הדחויה
204
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
287
2Dutch (nl)
Vertraagde-slaapfasesyndroom
61
3German (de)
Schlafphasensyndrom
60
4Chinese (zh)
睡眠相位后移症候群
47
5Japanese (ja)
睡眠相後退症候群
38
6Spanish (es)
Síndrome de la fase del sueño retrasada
34
7Hebrew (he)
תסמונת פאזת השינה הדחויה
29
8Italian (it)
Sindrome da sonno posticipato
28
9French (fr)
Syndrome de retard de phase du sommeil
23
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 2026

Language versions of the article "Delayed sleep phase disorder" with the highest AI in June 2026
#LanguageAI awardRelative AI
1Azerbaijani (az)
Gecikmiş yuxu mərhələsi sindromu
1
2Arabic (ar)
اضطراب طور النوم المتأخر
0
3Czech (cs)
Syndrom odkládané spánkové fáze
0
4Danish (da)
Socialt jetlag
0
5German (de)
Schlafphasensyndrom
0
6English (en)
Delayed sleep phase disorder
0
7Spanish (es)
Síndrome de la fase del sueño retrasada
0
8Persian (fa)
اختلال تأخیر در فاز خواب
0
9Finnish (fi)
Viivästynyt unijakso
0
10French (fr)
Syndrome de retard de phase du sommeil
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
180
2Arabic (ar)
اضطراب طور النوم المتأخر
178
3Chinese (zh)
睡眠相位后移症候群
132
4Italian (it)
Sindrome da sonno posticipato
110
5Ukrainian (uk)
Синдром затримки фази сну
65
6Persian (fa)
اختلال تأخیر در فاز خواب
63
7Japanese (ja)
睡眠相後退症候群
50
8Russian (ru)
Синдром задержки фазы сна
44
9French (fr)
Syndrome de retard de phase du sommeil
43
10Dutch (nl)
Vertraagde-slaapfasesyndroom
36
More...

Scores

Estimated value for Wikipedia:
Simple English:
Global:
Popularity in June 2026:
Simple English:
Global:
Popularity in all years:
Simple English:
Global:
Authors in June 2026:
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:
#21703
11.2015
Global:
#13581
12.2018

AI rank trends

Best Rank Simple English:
#586
09.2014
Global:
#10589
05.2003

Local AI rank history

Languages comparison

Important global interconnections (July 2025 – June 2026)

Wikipedia readers most often find their way to information on Delayed sleep phase disorder from Wikipedia articles about Night owl, Obsessive-compulsive disorder, Circadian rhythm sleep disorder, Attention deficit hyperactivity 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, Night owl, Circadian rhythm sleep disorder, Orexin and Circadian rhythm.

Cumulative results of quality and popularity of the Wikipedia article

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

News from 1 July 2026

On 1 July 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: 2026 FIFA World Cup, Kylian Mbappé, Erling Haaland, Democratic Republic of the Congo, FIFA World Cup, Harry Kane, Romelu Lukaku, Senegal, Michael Olise, Sadio Mané.

In Simple English Wikipedia the most popular articles on that day were: List of European countries, Black, List of sex positions, 2026 Iran war, Suresh Raina, Politics of Germany, Academy Award for Best Director, 2020, DYSS-TV, 2022.

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 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information