| Disease present | Disease absent |
|---|
Test result positive | 23 | 1 |
Test result negative | 3 | 112 |
- Sensitivity=23/26=0.88 (0.69–097, 95% CI)
- Specificity=112/113=0.99 (0.94–0.99, 95% CI)
- For any particular positive result, the probability that it is positive (positive predictive value ) is: 23/24=0.96 (0.77–0.99, 95% CI)
- For any particular negative result, the probability that it is negative (negative predictive value)is: 112/115=0.97 (0.91–0.99, 95% CI)
- Positive likelihood ratio=sensitivity/(1−specificity)=0.88/(1−0.99)=0.88/0.01=99.96 (14.13–706.96, 95% CI)
- Negative likelihood ratio=(1−sensitivity)/specificity=(1−0.88)/0.99=0.116 (0.0401–0.337, 95% CI)
