Were the measurements reliable? Need help interpreting my info. Refer to the tes
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Question
Were the measurements reliable? Need help interpreting my info.
Refer to the test results in Table 2 for Hawkin’s and Yergason’s tests. Describe the results in sentence form (i.e., do not just list the percentages). Then, test your understanding by placing a circle around the correct underlined response in items 2 and 3 below that makes the statements below true.
Hawkins test
Sensitivity: The sensitivity of the Hawkins test was 92.1%.<----- not sure what this means
Specificity: The specificity of the Hawkins test was 25.0%
Yergason test
Specificity: The specificity of the Yergason test was 86.1%
Sensitivity: The sensitivity of the Yergason test was 37.0%
The Hawkins test is more/less likely to be positive/negative in people with SIS. Therefore, it is most useful in ruling in/out SIS because if it is positive/negative you can be pretty sure the person does/does not have SIS.
The Yergason test is more/less likely to be positive/negative in people without SIS. Therefore, it is most useful in ruling in/out SIS because if it is positive/negative you can be pretty sure the person does/does not have SIS.
Table 2 Sensitivity, specificity values and confidence intervals in clinical diagnastic tests Sensitiviry Specifieity Accuracy PP NPV Hawkins Neer Horizontal adduction Speed Yergason Painful arc Drop arm 92.1 88.7 82.0 68.5 37.0 32.5 8 72.8 72.0 66,4 64.8 75.2 56.2 25.0 30,5 27.7 55.5 86.1 80.5 97.2 75.9 52.3 73.7 38.4 79.2 41.6 35.6 32.5 87.5 29.9 86.8 80.5 46.4 33.6 Table 3 Sensitivity, specificity and confidence interval values in rest comubinations Accuracy PPV NPV Specificity Ce Sensitivity Case number (9 5 Positive tests All positive At lcast 6 positive At least 5 positive 4.4 30.3 38.2 69.6 8 97.2 88.8 86.1 66.6 14.4 31.2 17.2 52.0 80.0 29.1 87.0 34.0 87.1 36.0 83.7 47.0 78.9 4. 31 39 At least positive 74 t least 3 positive95 72.8Explanation / Answer
Sensitivity of a test means that , how many Positives were correctly identified as Positives.
The sensitivity of the Hawkins test was 92.1% means that if we assume 100 Positive cases, Hawkins test could correctly identify 92.1 of them as Positives, rest were labelled Negative.
Specificity of Hawkins Test was 25% means that if there were 100 Negative cases, Hawkins test could correctly label 25 of them as Negatives, rest were labelled Positive.
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The specificity of the Yergason test was 86.1% means that if there were 100 Negative cases, Yergason Test correctly labeled 86.1 of them as Negative, rest were labelled Positive.
The Sensitivity of Yergason Test was 37% means that if there were 100 Positive cases, Yergason Test correctly labeled 37 as Positive, rest were labeled Negative.
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The Hawkins test is less likely to be negative in people with SIS, (only 100-92.1%) Therefore, it is most useful in ruling out SIS because if it is negative you can be pretty sure the person does not have SIS.
Explanation:
Hawkins test Classified even Negatives as Positives as indicated by low Specificity of 25%, but has a high Sensitivity 92.1% so it classifies very few Positives as Negatives. Hence, if it says Negative, then we can be quite sure that case is Negative. This helps in ruling out the possibility of disease.
The Yergason test is more likely to be negative in people without SIS, (86.1%) Therefore, it is most useful in ruling in SIS because if it is positive you can be pretty sure the person does have SIS.
Explanation:
Yergason test Classified even Positives as Negatives as indicated by low Sensitivity of 37%, but has a high Specificity 86.1% so it classifies very few Negatives as Positives . Hence, if it says Positive, then we can be quite sure that case is Positive. This helps in ruling in the possibility of disease.
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