Search on: CONTROLLED CLINICAL TRIALS AS TOPIC 
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Descriptor English:   Controlled Clinical Trials as Topic 
Descriptor Spanish:   Ensayos Clínicos Controlados como Asunto 
Descriptor Portuguese:   Ensaios Clínicos Controlados como Assunto 
Tree Number:   E05.318.760.535.365
E05.337.250.365
N05.715.360.775.235.387
N06.850.520.450.535.365
SP5.001.012.038.059.060
VS2.002.003.001.003.005
Definition English:   Clinical trials involving one or more test treatments, at least one control treatment, specified outcome measures for evaluating the studied intervention, and a bias-free method for assigning patients to the test treatment. The treatment may be drugs, devices, or procedures studied for diagnostic, therapeutic, or prophylactic effectiveness. Control measures include placebos, active medicines, no-treatment, dosage forms and regimens, historical comparisons, etc. When randomization using mathematical techniques, such as the use of a random numbers table, is employed to assign patients to test or control treatments, the trials are characterized as RANDOMIZED CONTROLLED TRIALS AS TOPIC. 
Indexing Annotation English:   for general design, methodology, economics, etc. of clinical trials; a different heading CONTROLLED CLINICAL TRIAL is used for reports of a specific clinical trial
See Related English:   Control Groups
 
History Note English:   2008(1995); use CLINICAAL TRIALS 1980-1984 
Allowable Qualifiers English:  
AE adverse effects CL classification
CT contraindications EC economics
ES ethics HI history
IS instrumentation LJ legislation & jurisprudence
MT methods MO mortality
NU nursing PX psychology
ST standards SN statistics & numerical data
TD trends UT utilization
VE veterinary  
Record Number:   32299 
Unique Identifier:   D018849 

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