「Epi practicals - 12 April 2021」の版間の差分

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(ページの作成:「==Epi practicals== ===12 April 2021=== Is this test useful Practical - HIV *Q1 {|class="wikitable" |- ! !With disease !Without disease |- !test positive |152 |20 |- !te…」)
 
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**Sensitivity=<math>\frac{152}{160} = 0.95</math>
 
**Sensitivity=<math>\frac{152}{160} = 0.95</math>
 
**Specificity=<math>\frac{980}{1000} = 0.98</math>
 
**Specificity=<math>\frac{980}{1000} = 0.98</math>
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 +
*Q3
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**a)
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{|class="wikitable"
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|-
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!
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!With disease
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!Without disease
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|-
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!test positive
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|38
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|1999.2
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|-
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!test negative
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|2
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|97960.8
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|-
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!sum
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|40
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|99,960
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|}
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***Positive predictive value=<math>\frac{38}{38+1999.2}=0.187</math>
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***Negative predictive value=<math>\frac{97960.8}{2+97960.8}=0.999</math>
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**b)

2021年4月12日 (月) 15:05時点における版

Epi practicals

12 April 2021

Is this test useful

Practical - HIV

  • Q1
With disease Without disease
test positive 152 20
test negative 8 980
  • Q2
    • Sensitivity=[math]\displaystyle{ \frac{152}{160} = 0.95 }[/math]
    • Specificity=[math]\displaystyle{ \frac{980}{1000} = 0.98 }[/math]
  • Q3
    • a)
With disease Without disease
test positive 38 1999.2
test negative 2 97960.8
sum 40 99,960
      • Positive predictive value=[math]\displaystyle{ \frac{38}{38+1999.2}=0.187 }[/math]
      • Negative predictive value=[math]\displaystyle{ \frac{97960.8}{2+97960.8}=0.999 }[/math]
    • b)
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