Margins | Yes Number | No Number | Total Number |
---|---|---|---|

Negative | 0 (3.94)^{*} | 46 (41.4) | 46 |

Positive | 6 (2.06) | 18 (21.94) | 24 |

Total | 6 | 64 | 70 |

* Numbers in parentheses are calculated.

Note: The observed χ

^{2}= 12.38. If there were an effect at the*P*= .005 level, then the expected χ^{2}= 7.88. Because the observed exceeds the expected, we conclude the margin type affects the frequency of severe recurrence (*P*= .005). Reject the null hypothesis that the frequencies are the same