SchizophreniaNCT00155519
A Psychopathological Study of Latent (Early) Schizophrenia: Clinical Pathology/Neuropsychological Dysfunctions
An observational study of Schizophrenia and Latent Schizophrenia, run by National Taiwan University Hospital.
Trial summary
Current diagnostic criteria of schizophrenia are based on marked positive and negative symptoms. This definition may impede the exploration of basic phenomenological psychopathology or pathological mechanism of schizophrenia. Read more about this study
- Who is it for?
- Ages 18 to 65 yearsHealthy volunteers can take part
- Conditions the study is for
- Schizophrenia, Latent Schizophrenia
- How many people
- 130 participants
- Where
- No sites listed yet
- Study dates
- Jul 2002to Jul 2002
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 65 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Schizophrenia
- Latent Schizophrenia
Who cannot join
- -
About this study
Current diagnostic criteria of schizophrenia are based on marked positive and negative symptoms. This definition may impede the exploration of basic phenomenological psychopathology or pathological mechanism of schizophrenia. Schizophrenia was found to have neuroanatomical, neurophysiological and neuropsychological impairment. However, the existence of these basic pathological states may not manifest as clinical state of schizophrenia, and it is found in normal relatives of schizophrenia proband. The clinical state of this underlying pathology may include so-called latent or early, or pseudo-neurotic schizophrenia or schizotypal disorder. The manifestation of prominent neurotic symptom state may not only present as an psychopathological issue, but also induce misdiagnosis in clinical practice. This may interfere early diagnosis of schizophrenia and may delay the chance of early and appropriate treatment.
Taking the fact of this disadvantaged conditions, this research is for exploration of clinical pathology and neuropsychological functions of latent or pseudo-neurotic schizophrenia. The strategy ia a natural follow-up study on the clinical cases obtained from the registration record of the medical charts of the National Taiwan University Hospital from 1970 to 1995. The natural follow-up results till study time (5 yrs to 30 yrs following period) will be explored. By using neurotic group (50 cases), latent schizophrenia group (50 cases) and schizotypal group (30 cases), the differences in clinical pathology, neuropsychological functions and family history of schizophrenia will be examined. There are 5 hypotheses to be tested: (1) Schizotaxia may exist as the manifestations of latent schizophrenia, schizotypal disorder and frank schizophrenia. The severity of pathology increased step by step; (2) The syndrome may change from the lower order to higher order to higher order, but not all of them changed to the higher order; (3) The clinical pathology of latent schizophrenia has both neurotic symptom as well as basic symptoms of schizophrenia; (4) There is the same kind of neuropsychological impairment of schizophrenia in the group of latent schizophrenia, and (5) The prevalence of schizophrenia in the first degree relatives of latent schizophrenia is higher than that of the general population. Finally, this study results will help the establishment of valid screening and/or diagnostic method (criteria) of latent schizophrenia for clinical and research usage.
- Conditions
- Schizophrenia, Latent Schizophrenia
- Keywords
- Schizophrenia, Latent Schizophrenia, Schizotypal Disorder, Psychopathology, Neuropsychological Function, Family History, Nosology, basic symptoms
- Medical subject headings
- Schizophrenia, Schizotypal Personality Disorder
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted12 Sep 2005 (estimated)
- Study startJul 2002
- Study completionJul 2002
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for SchizophreniaStudies of the same condition, open and under way.
- More trials run by National Taiwan University HospitalThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Defined population
- Time perspective
- Other
- Enrolment
- 130 participants
Sponsor and investigators
- Lead sponsor
- National Taiwan University Hospital
- Sponsor type
- University, hospital or other
- Investigators
- Hai-Gwo Hwu, Professor, Principal investigator, National Taiwan University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00155519
- Sponsor's protocol ID
- 10892
- Other IDs
- NSC-89-2413-H-002-042, NSC-90-2413-H-0052-023
- Status last verified
- Aug 2000
- First submitted
- 9 Sep 2005
- Last updated
- 28 Nov 2005
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 28 Nov 2005. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Psychopathological Study of Latent (Early) Schizophrenia: Clinical Pathology/Neuropsychological Dysfunctions
- ClinicalTrials.gov ID
- NCT00155519
- Acronym / sponsor ID
- 10892
- Conditions
- Schizophrenia, Latent Schizophrenia
- Keywords
- Schizophrenia, Latent Schizophrenia, Schizotypal Disorder, Psychopathology, Neuropsychological Function, Family History, Nosology, basic symptoms
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 130 participants
- Lead sponsor
- National Taiwan University HospitalUniversity, hospital or other
- Study start
- Jul 2002
- Study completion
- Jul 2002
- First posted
- 12 Sep 2005 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Current diagnostic criteria of schizophrenia are based on marked positive and negative symptoms. This definition may impede the exploration of basic phenomenological psychopathology or pathological mechanism of schizophrenia. Schizophrenia was found to have neuroanatomical, neurophysiological and neuropsychological impairment. However, the existence of these basic pathological states may not manifest as clinical state of schizophrenia, and it is found in normal relatives of schizophrenia proband. The clinical state of this underlying pathology may include so-called latent or early, or pseudo-neurotic schizophrenia or schizotypal disorder. The manifestation of prominent neurotic symptom state may not only present as an psychopathological issue, but also induce misdiagnosis in clinical practice. This may interfere early diagnosis of schizophrenia and may delay the chance of early and appropriate treatment.
Taking the fact of this disadvantaged conditions, this research is for exploration of clinical pathology and neuropsychological functions of latent or pseudo-neurotic schizophrenia. The strategy ia a natural follow-up study on the clinical cases obtained from the registration record of the medical charts of the National Taiwan University Hospital from 1970 to 1995. The natural follow-up results till study time (5 yrs to 30 yrs following period) will be explored. By using neurotic group (50 cases), latent schizophrenia group (50 cases) and schizotypal group (30 cases), the differences in clinical pathology, neuropsychological functions and family history of schizophrenia will be examined. There are 5 hypotheses to be tested: (1) Schizotaxia may exist as the manifestations of latent schizophrenia, schizotypal disorder and frank schizophrenia. The severity of pathology increased step by step; (2) The syndrome may change from the lower order to higher order to higher order, but not all of them changed to the higher order; (3) The clinical pathology of latent schizophrenia has both neurotic symptom as well as basic symptoms of schizophrenia; (4) There is the same kind of neuropsychological impairment of schizophrenia in the group of latent schizophrenia, and (5) The prevalence of schizophrenia in the first degree relatives of latent schizophrenia is higher than that of the general population. Finally, this study results will help the establishment of valid screening and/or diagnostic method (criteria) of latent schizophrenia for clinical and research usage.
Study design
- Observational model
- Defined population
- Time perspective
- Other
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- Schizophrenia
- Latent Schizophrenia
Key exclusion criteria (1 listed)
- -
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Not reported in the source record.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 28 Nov 2005.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Hai-Gwo Hwu, Professor principal investigator
National Taiwan University
Questions about this trial
What is this clinical trial studying?
An observational study of Schizophrenia and Latent Schizophrenia, run by National Taiwan University Hospital.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 28 Nov 2005. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 28 Nov 2005.