General Practitioner Index Score | Case Patients, No. | Control Patients, No. | Unadjusted | Adjusted^{a} | ||||
---|---|---|---|---|---|---|---|---|

Odds Ratio | 95% CI | P Value | Odds Ratio | 95% CI | P Value | |||

Q1 (0.01 to <0.18) | 232 | 403 | 3.591 | 2.393–5.387 | <.001 | 2.318 | 1.481–3.627 | <.001 |

Q2 (0.18 to <0.40) | 177 | 492 | 2.096 | 1.391–3.157 | <.001 | 1.614 | 1.033–2.522 | .04 |

Q3 (0.40 to <0.71) | 160 | 485 | 1.932 | 1.288–2.898 | .001 | 1.496 | 0.963–2.325 | .07 |

Q4 (0.71 to <1) | 151 | 508 | 1.585 | 1.066–2.359 | .02 | 1.031 | 0.666–1.596 | .89 |

1 (ref) | 49 | 235 | 1.000 | – | – | 1.000 | – | – |

Q=quartile; ref=reference category.

Note: Estimated odds ratios from a conditional (fixed-effects) logistic regression analysis.

↵a Adjusted for sex, number of general practitioner consultations, previous hospital admission, and morbidities. For complete table, see Supplemental Table 7, http://www.annfammed.org/content/15/6/515/suppl/DC1.