Clinical trial registry record

The Effect of Circadian Clock System on Perioperative Cognitive Function of Elderly Patients

A registered study indexed because it matched monitored longevity research terms. Registry status: Unknown. Registration does not establish safety or effectiveness.

Plain-language guide

Five questions to ask about this record

What this is
A clinical study registration, not a result or recommendation.
Why it may matter
The registry currently reports Unknown.
Evidence
Registered phase not reported study.
Main limitation
Registration does not prove that the intervention works, is safe, or is available to you.
What changed
Registry metadata was last updated December 11, 2019.
Where to verify
Open the primary registry below for eligibility, locations, contacts, and current status.
Registry ID
NCT04194866
Last registry update
December 11, 2019
Status
Unknown
Phase
Phase not reported
Sponsor
Shengjing Hospital
Enrollment
120
Countries
China
Match confidence
100%
Source feed
ClinicalTrials.gov
Automated source synopsis

A registered study indexed because it matched monitored longevity research terms. Registry status: Unknown. Registration does not establish safety or effectiveness.

Evidence snapshot

What the source actually supports

Evidence stage
Phase not reported
Study design
RANDOMIZED · PARALLEL · OTHER · QUADRUPLE
Evidence population
Human clinical study registration
Participants
120
Population
ALL · 65 Years to 90 Years
Duration
2020-01-01 to 2022-12-31
Intervention
receiving operation during the day or at night
Comparator
Not reported
Outcomes measured
postoperative sleep quality of one night before surgery — one night before the surgery; postoperative sleep quality of first night after surgery — the first night after surgery; postoperative sleep quality of third night after surgery — the third night after surgery; Preoperative cognitive function test — one day before surgery; Postoperative cognitive function test of 6 weeks after surgery — 6 weeks after surgery; Postoperative cognitive function test of 1 year after surgery — 1 year after surgery; Postoperative cognitive function test of 3 years after surgery — 3 years after surgery
Reported result
No reusable finding-level result is available in this record.

Main limitationThis is a study registration. No reusable structured result is available here, so it cannot show whether the intervention worked or was safe.

Safety and approvalEligibility, adverse-event details, and clinical decisions must be checked in the official registry and with qualified clinicians. Trial registration is not regulatory approval and does not establish that an intervention is available.

Source supportStructured registry protocol metadata; no finding-level conclusion is generated.

Trial stage · Phase not reportedA trial phase describes development stage; it does not establish a positive result.
Phase 1Phase 2Phase 3Phase 4

Registration and recruitment status do not establish safety, efficacy, or regulatory approval.

Why this record appears here · 100% topic match

The title, summary, or source keywords matched one or more topics followed by immortal.life. A higher percentage means a stronger topic match; it does not rate safety, effectiveness, or study quality.

  • Circadian rhythms · 100%Title contains controlled term: circadian clock. Abstract contains controlled term: circadian rhythm. Source terminology contains: circadian clock. Title supplies longevity context: elderly. Study type is explicitly identified as INTERVENTIONAL.
  • Sleep · 100%Title contains controlled term: circadian. Abstract contains controlled term: sleep, circadian. Source terminology contains: circadian. Title supplies longevity context: elderly. Study type is explicitly identified as INTERVENTIONAL.

Automated source check 100% · update recency 50%. These figures help sort records; they are not medical ratings.

circadian rhythmssleep
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