Chart 2. Levels of evidence (ASHA, 2004) Level Description la Well-designed meta-analysis of more than one randomized controlled trial lb lla llb III IV Well-designed randomized controlled study Well-designed controlled study without randomization Well-designed quasi-experimental study Well-designed non-experimental studies, i.e., correlational and case studies Expert committee report, consensus conference, clinical experience of respected authorities Match the types of study with their ranking level. [Choose ] Level 3 ✓ Level 2 Level 1 Randomized control trial Cohort study Cross-sectional study Case-control study Single subiect design Level 2 Level 3 [Choose ] Ws V

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Chart 2. Levels of evidence (ASHA, 2004)
Level
Description
la Well-designed meta-analysis of more than one randomized
controlled trial
lb
lla
llb
III
IV
Well-designed randomized controlled study
Well-designed controlled study without randomization
Well-designed quasi-experimental study
Well-designed non-experimental studies, i.e., correlational
and case studies
Expert committee report, consensus conference, clinical
experience of respected authorities
Match the types of study with their ranking level.
Randomized control trial
Cohort study
Cross-sectional study
Case-control study
Single subject design
(time series)
Single case study
[Choose ]
Level 3
✓ Level 2
Level 1
Level 2
Level 3
[Choose]
[Choose ]
[Choose ]
Transcribed Image Text:Chart 2. Levels of evidence (ASHA, 2004) Level Description la Well-designed meta-analysis of more than one randomized controlled trial lb lla llb III IV Well-designed randomized controlled study Well-designed controlled study without randomization Well-designed quasi-experimental study Well-designed non-experimental studies, i.e., correlational and case studies Expert committee report, consensus conference, clinical experience of respected authorities Match the types of study with their ranking level. Randomized control trial Cohort study Cross-sectional study Case-control study Single subject design (time series) Single case study [Choose ] Level 3 ✓ Level 2 Level 1 Level 2 Level 3 [Choose] [Choose ] [Choose ]
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