Evidence map›Paper›PMID 42507091›Full record

ArticleBulletin of experimental biology and medicine2026

Melatonin Amplitude, but Not Phase, Is Associated with Sleep Efficiency in the Arctic.

D G Gubin, S N Kolomeychuk, I M Petrov, A A Markov, Yu A Petrova, K A Voronin, M S Mezhakova, Y V Boldyreva, A U Shigabaeva

Abstract read
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In one paragraph

Article in Bulletin of experimental biology and medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

D G GubinTyumen State Medical University, Ministry of Health of the Russian Federation, Tyumen, Russia. dgubin@mail.ru.
S N KolomeychukTyumen State Medical University, Ministry of Health of the Russian Federation, Tyumen, Russia.
I M PetrovTyumen State Medical University, Ministry of Health of the Russian Federation, Tyumen, Russia.
A A MarkovTyumen State Medical University, Ministry of Health of the Russian Federation, Tyumen, Russia.
Yu A PetrovaTyumen State Medical University, Ministry of Health of the Russian Federation, Tyumen, Russia.
K A VoroninTyumen State Medical University, Ministry of Health of the Russian Federation, Tyumen, Russia.
M S MezhakovaTyumen State Medical University, Ministry of Health of the Russian Federation, Tyumen, Russia.
Y V BoldyrevaTyumen State Medical University, Ministry of Health of the Russian Federation, Tyumen, Russia.
A U ShigabaevaTyumen State Medical University, Ministry of Health of the Russian Federation, Tyumen, Russia.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

This study investigated the relationship between the amplitude and phase of melatonin rhythm and sleep efficiency in 15 Arctic residents, accounting for the pronounced seasonal variations in the photic environment. Sleep efficiency was assessed using actigraphy across the winter and summer solstices, and the spring equinox. Analysis revealed no significant seasonal variations in sleep efficiency (p > 0.05). Multiple regression analysis, after adjusting for photoperiod, demonstrated a significant positive association between the melatonin amplitude and sleep efficiency (β = 0.317, p < 0.037, η

Indexed as

Circadian RhythmMelatoninSleepActigraphyArctic RegionsFemaleHumansMalePhotoperiodSeasonsSleep QualityMelatoninArcticcircadian rhythmmelatoninphotoperiodsleep quality

Identifiers

PMID42507091

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.