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List of works by Christian Ohmann

'Cloud computing' and clinical trials: report from an ECRIN workshop

scientific article published on 29 July 2015

A Prospective Pilot Trial for Pallidal Deep Brain Stimulation in Huntington's Disease.

scientific article published on 18 August 2015

A data dictionary approach to multilingual documentation and decision support for the diagnosis of acute abdominal pain. (COPERNICUS 555, an European concerted action).

scientific article

A metadata schema for data objects in clinical research

scientific article

A multi-center study on the regenerative effects of erythropoietin in burn and scalding injuries: study protocol for a randomized controlled trial

scientific article published on 3 May 2013

A standardised graphic method for describing data privacy frameworks in primary care research using a flexible zone model

scientific article

A systematic approach to the assessment of user satisfaction with health care systems: constructs, models and instruments

scientific article

A web-based data collection system for clinical studies using Java

scientific article

Abstracts der 3. Gemeinsamen Brachytherapiekonferenz SASRO/DEGRO/OEGRO

scientific article published on 01 June 2004

Acute abdominal pain--standardized findings as diagnostic support. Results of a prospective multicenter intervention study and testing of a computer-assisted diagnosis system

scientific article published in February 1992

Acute acalculous cholecystitis complicating trauma: a prospective sonographic study

scientific article published in November 1992

Acute appendicitis in late adulthood: incidence, presentation, and outcome. Results of a prospective multicenter acute abdominal pain study and a review of the literature

scientific article

Akathisia and suicidal ideation in first-episode schizophrenia

scientific article published in October 2012

Aluminum load in ICU patients during stress ulcer prophylaxis

scientific article published on 01 December 2006

An experimental study of respiratory reanimation of piglets following standardized near-drowning in fresh or salt-water

scientific article published on December 1981

Approaches to Implementing Clinical Decision Support in Commercial Hospital Information Systems using JAVA/CORBA/XML.

scientific article published in January 2000

Assay and identification of histamine in human gastric aspirate by a fluorometric--fluoroenzymatic technique. Its application in patients with chronic duodenal ulcer

scientific article published on 01 April 1982

Assessment of a demonstrator repository for individual clinical trial data built upon DSpace

scientific article published on 29 April 2020

Bayes theorem and conditional dependence of symptoms: different models applied to data of upper gastrointestinal bleeding

scientific article

Bayesian evidence synthesis for exploring generalizability of treatment effects: a case study of combining randomized and non-randomized results in diabetes

scientific article published on 22 November 2015

Blood glucose testing and primary prevention of Type 2 diabetes-evaluation of the effect of evidence-based patient information: a randomized controlled trial

scientific article published on August 2012

Blood glucose testing and primary prevention of diabetes mellitus type 2--evaluation of the effect of evidence based patient information

scientific article

CDISC standard-based electronic archiving of clinical trials

scientific article published on 20 July 2009

Cholecystectomy through laparotomy

scientific article published on June 15, 1992

Classification of processes involved in sharing individual participant data from clinical trials

scientific article published in February 2018

Clinical Trial Information Mediator.

scientific article

Clinical benefit of a diagnostic score for appendicitis: results of a prospective interventional study. German Study Group of Acute Abdominal Pain

scientific article published on 01 September 1999

Clinical value of diagnostic score for appendicitis: results of a prospective intervention study

scientific article published on 01 January 1998

Cognitive Effects of High-Frequency rTMS in Schizophrenia Patients With Predominant Negative Symptoms: Results From a Multicenter Randomized Sham-Controlled Trial

scientific article published on 3 October 2015

Collection of data in clinical studies via Internet

scientific article

Combining randomized and non-randomized evidence in clinical research: a review of methods and applications

scientific article published on 03 June 2014

Comparison of electronic health record system functionalities to support the patient recruitment process in clinical trials

scientific article published on 25 August 2014

Comparison of three databases with a decision tree approach in the medical field of acute appendicitis.

scientific article

Computer-assisted case-based education in surgery

scientific article published in May 2002

Coordination centers for clinical studies--structure and integration of non-university hospitals

scientific article published on January 2001

Coverage of enterococci in community acquired secondary peritonitis: results of a randomized trial

scientific article

Data collection in multi-center clinical trials via Internet. A generic system in Java.

scientific article

Definition and classification of the histamine-release response to drugs in anaesthesia and surgery: Studies in the conscious human subject ⬇️

scientific article published on September 1, 1982

Diagnosis of acute appendicitis in two databases. Evaluation of different neighborhoods with an LVQ neural network

scientific article published on January 1, 1998

Diagnostic emergency endoscopy in upper gastrointestinal bleeding--do we have any decision aids for patient selection?

scientific article

Diagnostic scores for acute appendicitis. Abdominal Pain Study Group.

scientific article

Distances to hospitals performing minimum volume relevant procedures in Germany 2004 to 2006

scientific article published on 20 July 2009

Do Germans keep patients too long in hospital? A prospective randomized trial

scientific article published on 01 September 2005

Do the stigmata of recent haemorrhage have additional prognostic value in patients with bleeding duodenal ulcer?

scientific article published on 01 January 1988

Does size really matter--using a decision tree approach for comparison of three different databases from the medical field of acute appendicitis.

scientific article

Duration of survival after peptic ulcer perforation

scientific article published on 01 March 2008

Early stomach carcinoma--pathologic-anatomic findings and prognosis ⬇️

scientific article published on 01 March 1998

Effect of bosentan on skin fibrosis in patients with systemic sclerosis: a prospective, open-label, non-comparative trial

scientific article published on 5 April 2010

Effect of the frequency of self-monitoring blood glucose in patients with type 2 diabetes treated with oral antidiabetic drugs-a multi-centre, randomized controlled trial

scientific article

Effects of nicotine on social cognition, social competence and self-reported stress in schizophrenia patients and healthy controls ⬇️

scientific article published on October 19, 2012

Efficacy of high-frequency repetitive transcranial magnetic stimulation in schizophrenia patients with treatment-resistant negative symptoms treated with clozapine

scientific article published on 29 January 2019

Efficacy of high-frequency repetitive transcranial magnetic stimulation on PANSS factors in schizophrenia with predominant negative symptoms - Results from an exploratory re-analysis

scientific article published on 17 February 2018

Endoscopic versus operative treatment in high-risk ulcer bleeding patients - results of a randomised study

scientific article published on 13 December 2002

Ensuring sustainability of software tools and services by cooperation with a research infrastructure

Epidemiology of Pelvic Fractures in Germany: Considerably High Incidence Rates among Older People

scientific article published on 29 September 2015

European Clinical Research Infrastructures Network Meeting Report

scholarly article by Jacques Demotes-Mainard et al published 2005 in Pharmaceutical Medicine

European Clinical Research Infrastructures Network: promoting harmonisation and quality in European clinical research

scientific article published on 01 January 2005

European and Latin-American countries associated in a networked database of outstanding guidelines in unusual clinical cases (ELCANO).

scientific article

European survey on national harmonization in clinical research

scientific article published on 21 February 2020

Evaluating compulsory minimum volume standards in Germany: how many hospitals were compliant in 2004?

scientific article

Evaluating four diagnostic methods with acute abdominal pain cases.

scientific article published in September 1995

Evaluation of automatic knowledge acquisition techniques in the diagnosis of acute abdominal pain. Acute Abdominal Pain Study Group.

scientific article

Evaluation of data completeness in the electronic health record for the purpose of patient recruitment into clinical trials: a retrospective analysis of element presence

scientific article

Evaluation of repositories for sharing individual-participant data from clinical studies

Excess Mortality After Pelvic Fractures Among Older People

scientific article

Extension of the primary care research object model (PCROM) as clinical research information model (CRIM) for the "learning healthcare system".

scientific article

Feasibility of 6-month maintenance cetuximab after adjuvant concurrent chemoradiation plus cetuximab in squamous cell carcinoma of the head and neck.

scientific article published on 5 July 2013

First Clinical Research Informatics (CRI) Solutions Day: advanced IT support from EU projects for clinical trials.

scientific article published on 22 May 2015

Formal decision aids in gastroenterology--results of a survey

scientific article published on 01 August 1992

Fostering EMA's transparency policy

scientific article published on 06 September 2014

Future developments of medical informatics from the viewpoint of networked clinical research. Interoperability and integration

scientific article

Gastrointestinal diseases in perioperative risk assessment

scientific article published on 01 June 1992

Generalisation and extension of a web-based data collection system for clinical studies using Java and CORBA.

scientific article

Helicobacter pylori in the upper gastrointestinal tract: medical or surgical treatment of gastric lymphoma?

scientific article

Heterogeneity prevails: the state of clinical trial data management in Europe - results of a survey of ECRIN centres

scientific article

Histamine and stress ulcer: new components in organizing a sequential trial on cimetidine prophylaxis in seriously ill patients and definition of a special group at risk (severe polytrauma)

scientific article published on 01 July 1980

Histamine release and hypotensive reactions in dogs by solubilizing agents and fatty acids: Analysis of various components in cremophor El and development of a compound with reduced toxicity ⬇️

scientific article published on 01 April 1982

Hospitals failing minimum volumes in 2004: reasons and consequences

scientific article published in February 2008

Implementation and effects of Germany's minimum volume regulations: results of the accompanying research

scientific article published on 22 December 2008

Incidence and pattern of peptic ulcer bleeding in a defined geographical area. DUSUK Study Group

scientific article

Integrating knowledge based functionality in commercial hospital information systems

scientific article

Integration of a data dictionary and a clinical database in an expert system for acute abdominal pain

scientific article published on January 1995

Integration of a knowledge-based system and a clinical documentation system via a data dictionary

scientific article

Internet-based decision-support server for acute abdominal pain

scientific article

Is perforating appendicitis a separate disease picture?

scientific article published on 01 January 1997

Is there any consensus in diagnostic and operative strategy with respect to medullary thyroid cancer? A questionnaire answered by 73 endocrine surgical units

scientific article published on February 2001

Laser-supported CD133+ cell therapy in patients with ischemic cardiomyopathy: initial results from a prospective phase I multicenter trial

scientific article

Left prefrontal high-frequency rTMS may improve movement disorder in schizophrenia patients with predominant negative symptoms – A secondary analysis of a sham-controlled, randomized multicenter trial

article

Left prefrontal high-frequency repetitive transcranial magnetic stimulation for the treatment of schizophrenia with predominant negative symptoms: a sham-controlled, randomized multicenter trial

scientific article published on 23 October 2014

Legal assessment tool (LAT): an interactive tool to address privacy and data protection issues for data sharing

scientific article

Letter to the Editor: Influence of rTMS on smoking in patients with schizophrenia

scientific article published in June 2017

Long-term biochemical results after operative treatment of primary hyperparathyroidism associated with multiple endocrine neoplasia types I and IIa: is a more or less extended operation essential?

scientific article published on 01 March 2001

Maintenance treatment with risperidone or low-dose haloperidol in first-episode schizophrenia: 1-year results of a randomized controlled trial within the German Research Network on Schizophrenia.

scientific article

Medical journal requirements for clinical trial data sharing: Ripe for improvement

scientific article published on 25 October 2021

Neurogenic appendicopathy in children

scientific article published on 01 February 2002

Neurogenic appendicopathy: a clinical disease entity?

scientific article published on 01 May 2002

Neuropsychiatric and cognitive changes after surgery for primary hyperparathyroidism

scientific article published in May 2006

Orchestrating differential data access for translational research: a pilot implementation

scientific article

Peptic ulcer bleeding: medical and surgical point of view. Results of a prospective interdisciplinary multicenter observational study. DUSUK Study Group

scientific article published on December 1, 1992

Perforated peptic ulcer: is there a difference between Eastern Europe and Germany? Copernicus Study Group and Acute Abdominal Pain Study Group

scientific article published on 01 August 2000

Perforating appendicitis: is it a separate disease? Acute Abdominal Pain Study Group

scientific article published on 01 May 1999

Pharmacological long-term treatment strategies in first episode schizophrenia--study design and preliminary results of an ongoing RCT within the German Research Network on Schizophrenia

scientific article published in April 2004

Planned relaparotomy vs relaparotomy on demand in the treatment of intra-abdominal infections. The Peritonitis Study Group of the Surgical Infection Society-Europe

scientific article published on 01 November 1995

Pneumococcal conjugate vaccine provides early protective antibody responses in children after related and unrelated allogeneic hematopoietic stem cell transplantation

scientific article published on 7 November 2006

Poor late prognosis of bleeding peptic ulcer

scientific article published on 14 July 2007

Predicting Response to Repetitive Transcranial Magnetic Stimulation in Patients With Schizophrenia Using Structural Magnetic Resonance Imaging: A Multisite Machine Learning Analysis

scientific article

Predicting delirium after vascular surgery: a model based on pre- and intraoperative data

scientific article

Prediction of risk for pseudoallergic reactions and histamine release in patients undergoing anaesthesia and surgery: a computer-aided model using independence-Bayes

scientific article published in April 1988

Preventing recurrent postoperative adhesions: an experimental study in rats

scientific article published on 01 January 1989

Prevention of Type 2 Diabetes: Evidence-Based Patient Information--A Randomised Controlled Trial ⬇️

scientific article published on April 2, 2013

Primary gastric B-cell lymphoma: results of a prospective multicenter study. The German-Austrian Gastrointestinal Lymphoma Study Group

scientific article published on 01 November 2000

Principles of surgical indications: aids in decision making

scientific article published on 01 January 1986

Prognostic indices in peritonitis

scientific article published on July 1, 1997

Prognostic modelling in peritonitis. Peritonitis Study Group of the Surgical Infection Society Europe.

scientific article published in January 1997

Prognostic scores in oesophageal or gastric variceal bleeding

scientific article

Promoting stigma coping and empowerment in patients with schizophrenia and depression: results of a cluster-RCT

scientific article published on 13 September 2019

Proposal for a European Public Health Research Infrastructure for Sharing of health and Medical administrative data (PHRIMA).

scientific article

Proposed definitions for diagnosis, severity scoring, stratification, and outcome for trials on intraabdominal infection. Joint Working Party of SIS North America and Europe

scientific article published on March 1990

Prospective evaluation of prognostic scoring systems in peritonitis. Peritonitis Study Group.

scientific article published in May 1993

Provenance Model for Randomized Controlled Trials

Quality and its evaluation

scientific article published on 01 January 1993

Quality assurance from the theoretical viewpoint

scientific article published on 01 July 1995

Quality assurance in gastroenterology: the Telegastro project

scientific article published on October 1994

Raising standards in clinical research - The impact of the ECRIN data centre certification programme, 2011-2016.

scientific article

Rates and predictors of remission in first-episode schizophrenia within 1 year of antipsychotic maintenance treatment. Results of a randomized controlled trial within the German Research Network on Schizophrenia

scientific article published in May 2013

Recording the postoperative course. What data are necessary? Mortality or fatality, during hospitalization, within 30 and 90 days?

scientific article published on January 1, 1992

Relapse prevention in first-episode schizophrenia--maintenance vs intermittent drug treatment with prodrome-based early intervention: results of a randomized controlled trial within the German Research Network on Schizophrenia

scientific article

Reliability and practicability of the fluorometric-fluoroenzymatic histamine determination in pathogenetic studies on peptic ulcer: detection limits and problems with specificity

scientific article published in June 1987

Repetitive transcranial magnetic stimulation for the treatment of negative symptoms in residual schizophrenia: rationale and design of a sham-controlled, randomized multicenter study

scientific article published in November 2009

Report About A Workshop On Sensitive Data: Repositories For Sharing Individual Participant Data From Clinical Trials And Existing Tools/Services For Storing Clinical Trial Data

Revising the ECRIN standard requirements for information technology and data management in clinical trials

scientific article

Risk analysis and risk adapted on-site monitoring in noncommercial clinical trials

scientific article published on 06 November 2009

Risk factors associated with intraabdominal infections: a prospective multicenter study. Peritonitis Study Group

scientific article published on 01 February 1999

Roentgen imaging in acute abdominal pain is dispensable

scientific article published on 01 January 1997

S49. EFFICACY OF HIGH-FREQUENCY REPETITIVE TRANSCRANIAL MAGNETIC STIMULATION ON PANSS FACTORS IN SCHIZOPHRENIA WITH PREDOMINANT NEGATIVE SYMPTOMS – RESULTS FROM AN EXPLORATORY RE-ANALYSIS.

scientific article published in April 2018

Safety of a low-dosage Filgrastim (rhG-CSF) treatment in non-neutropenic surgical intensive care patients with an inflammatory process

scientific article published on 01 January 1997

Second-Line Treatment of Advanced Urothelial Cancer with Paclitaxel and Everolimus in a German Phase II Trial (AUO Trial AB 35/09).

scientific article published on 11 March 2015

Sharing and reuse of individual participant data from clinical trials: principles and recommendations.

scientific article published on 14 December 2017

Short-term treatment with risperidone or haloperidol in first-episode schizophrenia: 8-week results of a randomized controlled trial within the German Research Network on Schizophrenia

scientific article published on 9 May 2008

Significance of anamnesis and clinical findings for diagnosis of acute appendicitis. Acute Abdominal Pain Study Group

scientific article published in October 1994

Significance of lymph node metastases of differentiated thyroid gland carcinomas and C-cell carcinomas for prognosis--a meta-analysis

scientific article published on January 1, 1997

Simple data from history and physical examination help to exclude bowel obstruction and to avoid radiographic studies in patients with acute abdominal pain

scientific article

Social media attention and citations of published outputs from re-use of clinical trial data: a matched comparison with articles published in the same journals

scientific article published on 06 June 2021

Socioeconomic factors and effect of evidence-based patient information about primary prevention of type 2 diabetes mellitus--are there interactions?

scientific article

Sonomorphology of stress cholecystitis

scientific article

Standard requirements for GCP-compliant data management in multinational clinical trials

scientific article

Status report on epidemiology of acute appendicitis

scientific article published on August 2002

Status, use and impact of sharing individual participant data from clinical trials: a scoping review

scientific article published on 18 August 2021

Structural brain changes are associated with response of negative symptoms to prefrontal repetitive transcranial magnetic stimulation in patients with schizophrenia

scientific article published on 11 October 2016

Superficial soft tissue sarcomas of the extremities and trunk

scientific article published on August 2009

Surgical epidemiology

scientific article published on January 1, 1997

Symptomless and complicated peptic ulcer as an extreme clinical form of ulcer disease: consequences for choice between conservative and surgical therapy

scientific article published in January 1985

TACE plus sorafenib for the treatment of hepatocellular carcinoma: results of the multicenter, phase II SOCRATES trial

scientific article published on 31 August 2014

TNF-α, myocardial perfusion and function in patients with ST-segment elevation myocardial infarction and primary percutaneous coronary intervention

scientific article

The effect of a Diabetes-Specific Cognitive Behavioral Treatment Program (DIAMOS) for patients with diabetes and subclinical depression: results of a randomized controlled trial

scientific article published on 20 January 2015

The effect of preoperative parenteral nutrition on the perioperative course in patients with esophageal cancer

scientific article published on 01 January 1989

The effects of combined acamprosate and integrative behaviour therapy in the outpatient treatment of alcohol dependence: a randomized controlled trial

scientific article published on 31 May 2011

The intensive care gallbladder--a transient phenomenon or a problem requiring therapy?

scientific article published on April 1, 1995

Thyroid function after surgery for autonomous and non-autonomous nodular endemic goitre--effect of iodide-substitution

scientific article published on 01 September 1985

Time-trends in the epidemiology of peptic ulcer bleeding

scientific article published in August 2005

Towards integration of clinical decision support in commercial hospital information systems using distributed, reusable software and knowledge components ⬇️

scientific article published on December 1, 2001

Transhiatal oesophagectomy compared with transthoracic resection and systematic lymphadenectomy for the treatment of oesophageal cancer

scientific article published on August 1995

Two short-term outcomes after instituting a national regulation regarding minimum procedural volumes for total knee replacement

scientific article published on 01 March 2010

Ultrasonography for diagnosis of acute appendicitis: results of a prospective multicenter trial. Acute Abdominal Pain Study Group

scientific article published on 01 February 1999

Upper gastrointestinal tract bleeding: assessing the diagnostic contributions of the history and clinical findings

scientific article published on 01 October 1986

Using electronic health records for clinical research: the case of the EHR4CR project

scientific article

Value of 3D TEE for LAA Morphology

scientific article published in September 2015

Various strategies in the diagnosis and therapy of thyroid gland cancer. Results of a survey

scientific article published on 01 June 1989

Which peptic ulcers bleed? Results of a case-control study. DUSUK Study Group

scientific article published in February 1997

Within-trial economic evaluation of diabetes-specific cognitive behaviour therapy in patients with type 2 diabetes and subthreshold depression

scientific article

[A clinical study of co2-elimination using a modified bain-system (author's transl)]

scientific article published on 01 February 1981

[A new model of comprehensive data linkage--evaluation of its application in femoral neck fracture].

scientific article

[Acceptance and future of the internet for clinical trials in Germany--results of a survey]

scientific article published on 01 January 2000

[Acute coronary insufficiency during induction of anesthesia following anthracycline chemotherapy]

scientific article published on 01 May 1984

[Assessment and importance of clinical trial endpoints in various areas of medicine].

scientific article published in January 2010

[Avoiding abdominal roentgen images in acute abdominal pain--evaluation of a simple clinical decision support aid]

scientific article published on 01 January 1998

[Biomedical and clinimetric approaches in determining the causes of perioperative risk: developing a German ASA classification]

scientific article published on 01 January 1987

[Cause-oriented prevention of nosocomial pneumonia: the HI-LO EVAC tube]

scientific article published on 01 January 1998

[Clinical results of Palmer's primary cruciate ligament insertion without augmentation]

scientific article published on 01 June 1991

[Computer-assisted diagnosis and expert systems]

scientific article published on 01 February 1989

[Computer-assisted diagnosis]

scientific article published on 01 January 1988

[Computer-assisted surgery documentation in clinical routine practice]

scientific article published on 01 January 1993

[Diagnostic score for acute appendicitis]

scientific article published on 01 February 1995

[Economic restraints shorten the length of hospital stay: thyroid operation as a model case]

scientific article published on 01 July 2004

[Endoscopic ultrasound in routine clinical practice for staging adenocarcinomas of the stomach and distal esophagus]

scientific article published on 01 March 2003

[Formal decision aids in surgery--results of a survey]

scientific article

[Influence of minimum volumes on the structure of inpatient care]

scientific article published on 01 January 2008

[Is ultrasound examination in acute appendicitis dispensable? Acute Abdominal Pain Study Group]

scientific article published on 01 January 1998

[Making a decision in acute abdominal pain. Problem areas in particular patient groups and in routine quality assurance]

scientific article published on 01 April 1994

[Minimum hospital volumes for total knee replacement]

scientific article published on 01 April 2008

[Perioperative risk from the viewpoint of the surgeon. Analysis and clinical use]

scientific article published on 01 January 1988

[Preventive therapy of HNPCC--a study concept].

scientific article published in January 2001

[Prognostic factors in curative resection of stomach carcinoma. A uni- and multivariate analysis]

scientific article published on 01 January 1995

[Quantifications of perioperative risk]

scientific article published on 01 January 1987

[Surgical therapy of uncomplicated ulcer: results of a prospective epidemiologic study. DUSUK Study Group]

scientific article published on 01 July 1995

[Systematic evaluation of user satisfaction of physicians with a hospital information system--initial results]

scientific article published on 01 January 2000

[The Coordinating Centers for Clinical Trials (KKS) and the KKS Network: competence for clinical research]

scientific article published on 16 September 2010

[The diagnostic value of rectal examination of patients with acute appendicitis]

scientific article published on 01 January 1998

[Ulcer hemorrhage in elderly patients: primary conservative or surgical therapy?]

scientific article published on 01 January 1996

[Ulcer surgery '96--choice of methods in an emergency]

scientific article published on 01 January 1996

[Utilities: a solution of a decision problem?]

scientific article published on 01 January 2008

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