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Quality Assessment Results

Rowin_2000.pdf

Status: Completed
Document Type: Diagnostic Study
Assessment Tool: QUADAS-2 (Quality Assessment of Diagnostic Accuracy Studies) - Complete
Assessment completed!
13/13
Next check in: 5 seconds
15.4%
Overall Quality Score
2/13 criteria met

Assessment Details

Assessment Criterion AI Analysis AI Judgment Issues
Was a consecutive or random sample of patients enrolled?
ds_d1_rb1
The document does not explicitly state whether a consecutive or random sample of patients was enrolled. The study describes a retrospective search of an electromyography database followed by prospective identification, but does not specify the sampling method for patient selection.
no star awarded
Was a case-control design avoided?
ds_d1_rb2
The study explicitly describes a cohort design where patients were identified based on the presence of A-waves during routine F-wave studies, and their electrophysiologic diagnoses were noted. There is no mention of a case-control design, and the methodology clearly follows a cohort approach by identifying cases first and then noting their characteristics.
star awarded
Did the study avoid inappropriate exclusions?
ds_d1_rb3
The document does not explicitly describe any exclusions or the rationale for exclusions. While it mentions the retrospective and prospective identification of studies with A-waves, there is no information about whether any participants or studies were excluded and why. Without explicit documentation of exclusion criteria and their appropriateness, we cannot determine if inappropriate exclusions were avoided.
no star awarded
Are there concerns that the included patients and setting do not match the review question?
ds_d1_ac1
The document does not explicitly state whether the included patients and setting match the review question. While it describes the patient population and electrophysiologic diagnoses, there is no direct comparison to the intended use of the index test or the review question's scope.
no star awarded
Were the index test results interpreted without knowledge of the results of the reference standard?
ds_d2_rb1
The document does not explicitly state whether the index test results (A-wave identification) were interpreted without knowledge of the reference standard results (electrophysiologic diagnoses). The methods section describes the criteria for identifying A-waves but does not mention any blinding procedures between the index test and reference standard interpretations.
no star awarded
If a threshold was used, was it pre-specified?
ds_d2_rb2
The document does not explicitly state whether the threshold for A-wave identification was pre-specified before data collection. While the criteria for identifying A-waves are clearly defined ('supramaximally elicited reproducible waveforms with an amplitude greater than 0.05 mV...'), there is no explicit mention that these criteria were established prior to the study rather than being derived from the data.
no star awarded
Are there concerns that the index test, its conduct, or interpretation differ from the review question?
ds_d2_ac1
The document does not explicitly address whether the index test (A-wave identification during F-wave studies) was performed as it would be in practice. While the methods describe the technical aspects of how A-waves were identified and defined, there is no explicit comparison to standard clinical practice or discussion of potential deviations from routine clinical application. The study focuses on the technical definition and prevalence of A-waves rather than their practical clinical implementation.
no star awarded
Is the reference standard likely to correctly classify the target condition?
ds_d3_rb1
The document does not explicitly describe the reference standard used to classify the target condition (A-waves) beyond the operational definition provided for identification during F-wave studies. While the methods describe how A-waves were identified and characterized, there is no explicit statement confirming that this was the best available method for establishing presence/absence of A-waves, nor is there validation against an independent reference standard.
no star awarded
Were the reference standard results interpreted without knowledge of the results of the index test?
ds_d3_rb2
The document does not explicitly state whether the reference standard results were interpreted without knowledge of the index test results. There is no mention of blinding procedures or any methodological details that would ensure independence between the interpretation of reference standard and index test results.
no star awarded
Are there concerns that the target condition as defined by the reference standard does not match the question?
ds_d3_ac1
The document does not explicitly address whether the reference standard (A-wave definition) matches the target condition in the research question. While the study defines A-waves operationally, there is no explicit discussion comparing this definition to any pre-existing reference standard or validating its alignment with the clinical condition under investigation.
no star awarded
Was there an appropriate interval between index test and reference standard?
ds_d4_rb1
The document does not explicitly mention or describe the interval between the index test (A-wave identification) and any reference standard for diagnosis. The study focuses on the identification and characteristics of A-waves but does not address the temporal relationship between testing and diagnostic confirmation, which is required for this NOS criterion.
no star awarded
Did all patients receive the same reference standard?
ds_d4_rb2
The study explicitly states that all patients received the same reference standard for A-wave identification, with clearly defined criteria applied consistently across both retrospective and prospective portions of the study. The methodology describes uniform supramaximal stimulation and standardized recording procedures for all participants.
star awarded
Were all patients included in the analysis?
ds_d4_rb3
The document does not explicitly state whether all patients were included in the analysis or if there were any withdrawals. The study mentions the number of studies performed (1,258) and the number where A-waves were present (54), but there is no discussion of patient inclusion/exclusion criteria, follow-up procedures, or explanations for any potential withdrawals. Without explicit information about withdrawals or their potential impact on bias, we cannot confirm that this criterion is met.
no star awarded
Assessment Summary
13
Total Criteria
2
Criteria Met
11
Issues Found
15.4%
Quality Score

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