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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> | ||
+ | |||
+ | *Q3 | ||
+ | **a) | ||
+ | {|class="wikitable" | ||
+ | |- | ||
+ | ! | ||
+ | !With disease | ||
+ | !Without disease | ||
+ | |- | ||
+ | !test positive | ||
+ | |38 | ||
+ | |1999.2 | ||
+ | |- | ||
+ | !test negative | ||
+ | |2 | ||
+ | |97960.8 | ||
+ | |- | ||
+ | !sum | ||
+ | |40 | ||
+ | |99,960 | ||
+ | |} | ||
+ | ***Positive predictive value=<math>\frac{38}{38+1999.2}=0.187</math> | ||
+ | ***Negative predictive value=<math>\frac{97960.8}{2+97960.8}=0.999</math> | ||
+ | |||
+ | **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)