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Table 1 Target Population (n=10,000) Cases Controls Present 650 2250 2900 Absent 350 6750 7100 Total 1000 9000 10000 True Odds Ratio 5.57 True Prevalence
Table 1 Target Population (n=10,000) Cases Controls Present 650 2250 2900 Absent 350 6750 7100 Total 1000 9000 10000 True Odds Ratio 5.57 True Prevalence Ratio 4.55 Taking a 50% unbiased sample overall Assuming everyone is correctly classified, fill in the table below and calculate the measures of association Table 2 Cases Controls Present Absent Total Odds Ratio Prevalence Ratio Fill in the Table 3 below, where 20% of non-exposed cases in Table 2 is missclassified as exposed and 20% of non-exposed controls are misclassified as exposed Calculate the measures of association Table 3 Cases Controls Present Absent Total Odds Ratio Prevalence Ratio Is this differential or non-differential bias? Fill in the Table 4 below, where 40% of non-exposed cases in Table 2 is missclassified as exposed and 60% of non-exposed controls are misclassified as exposed Calculate the measures of association Table 4 Cases Controls Present Absent Total Odds Ratio Prevalence Ratio Is this differential or non-differential bias?
| Table 1 | Target Population (n=10,000) | ||||||||||
| Cases | Controls | ||||||||||
| Present | 650 | 2250 | 2900 | ||||||||
| Absent | 350 | 6750 | 7100 | ||||||||
| Total | 1000 | 9000 | 10000 | ||||||||
| True Odds Ratio | 5.57 | ||||||||||
| True Prevalence Ratio | 4.55 | ||||||||||
| Taking a 50% unbiased sample overall | |||||||||||
| Assuming everyone is correctly classified, fill in the table below and calculate the measures of association | |||||||||||
| Table 2 | Cases | Controls | |||||||||
| Present | |||||||||||
| Absent | |||||||||||
| Total | |||||||||||
| Odds Ratio | |||||||||||
| Prevalence Ratio | |||||||||||
| Fill in the Table 3 below, where 20% of non-exposed cases in Table 2 is missclassified as exposed and 20% of non-exposed controls are misclassified as exposed | |||||||||||
| Calculate the measures of association | |||||||||||
| Table 3 | Cases | Controls | |||||||||
| Present | |||||||||||
| Absent | |||||||||||
| Total | |||||||||||
| Odds Ratio | |||||||||||
| Prevalence Ratio | |||||||||||
| Is this differential or non-differential bias? | |||||||||||
| Fill in the Table 4 below, where 40% of non-exposed cases in Table 2 is missclassified as exposed and 60% of non-exposed controls are misclassified as exposed | |||||||||||
| Calculate the measures of association | |||||||||||
| Table 4 | |||||||||||
| Cases | Controls | ||||||||||
| Present | |||||||||||
| Absent | |||||||||||
| Total | |||||||||||
| Odds Ratio | |||||||||||
| Prevalence Ratio | |||||||||||
| Is this differential or non-differential bias? | |||||||||||
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Concepts In Set Theory
Authors: Mofidul Islam
1st Edition
9353146232, 9789353146238
