score confidence interval for an odds ratio in a 2x2 table [p1(1-p1)/(p2(1-p2))]

1 | ```
orscoreci(x1, n1, x2, n2, conf.level)
``` |

`x1` |
number of successes in sample 1 |

`n1` |
sample size in sample 1 |

`x2` |
number of successes in sample 2 |

`n2` |
sample size in sample 2 |

`conf.level` |
confidence coefficient |

A list with class '"htest"' containing the following components:

`conf.int ` |
a confidence interval for the difference in proportions. |

Cornfield, J. (1956) A statistical problem arising from retrospective
studies. In Neyman J. (ed.), *Proceedings of the third Berkeley
Symposium on Mathematical Statistics and Probability* 4, pp. 135–148.

Miettinen O. S., Nurminen M. (1985) Comparative analysis of two
rates. *Statistics in Medicine* 4, 213–226.

Agresti, A. 2002. Categorical Data Analysis. Wiley, 2nd Edition.

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