Marker | Hazards ratio | SE | z | P |
---|---|---|---|---|

P-gp^{a} | 1.52 | 0.298 | 1.41 | 0.160 |

GST-π^{a} | 1.82 | 0.357 | 1.68 | 0.093 |

TS | 1.75 | 0.284 | 1.97 | 0.048 |

Cisplatin resistance^{b} | 1.64 | 0.210 | 2.37 | 0.018 |

TS | 1.76 | 0.284 | 1.99 | 0.047 |

^{a}If the two significant platinum markers were added separately, there was marginal significance for each. However, the total model remained significant at*P*= 0.017.^{b}A variable created as the number of cisplatin markers expressed (range, 0 to 2 for GST-π and P-gp) allowed a multivariate model with significant independent predictive value (total model,*P*= 0.006).