# Compute sensitivity, specificity and predictive values

### Description

Compute sensitivity, specificity and predictive values

### Usage

1 2 3 4 | ```
Sensitivity(x,event,cutoff,comparison=">=",...)
Specificity(x,event,cutoff,comparison=">=",...)
NPV(x,event,cutoff,comparison=">=",...)
PPV(x,event,cutoff,comparison=">=",...)
``` |

### Arguments

`x` |
Either a binary 0,1 variable, or a numeric marker which is cut into binary. |

`event` |
Binary response variable. Either a 0,1 variable where 1 means 'event', or a factor where the second level means 'event'. |

`cutoff` |
When x is a numeric marker, it is compared to this cutoff to obtain a binary test. |

`comparison` |
How x is to be compared to the cutoff value |

`...` |
passed on to |

### Details

Confidence intervals are obtained with `binom.test`

### Value

list with Sensitivity, Specificity, NPV, PPV and confidence interval

### Author(s)

Thomas A. Gerds <tag@biostat.ku.dk>

### See Also

binom.test

### Examples

1 2 3 4 5 6 7 8 9 | ```
set.seed(17)
x <- rnorm(10)
y <- rbinom(10,1,0.4)
Sensitivity(x,y,0.3)
Specificity(x,y,0.3)
PPV(x,y,0.3)
NPV(x,y,0.3)
Diagnose(x,y,0.3)
``` |