| Regression coefficient | exp (regression coefficient) | Standard error | z value | p-value |

Intercept | −3.486 | 0.0306098 | 0.9067 | −3.845 | 0.000120 |

Transportation capacity for each train during peak hours | 3.372 × 10 | 1.0000337 | 6.499 × 10 | 5.189 | 2.12 × 10 |

Number of stairs and escalators in terminal stations | 0.2666 | 1.3054729 | 6.814 × 10 | 3.912 | 9.16 × 10 |

The average number of train lines | 1.175 | 3.2379618 | 0.4972 | 2.363 | 0.018113 |

Number of operating trains per hour during peak hours | −4.529 × 10 | 0.9557222 | 1.694 × 10 | −2.673 | 0.007523 |

Number of trains according to type | −0.2101 | 0.8105155 | 0.4972 | 2.363 | 0.018113 |

Number of lines with direct operation | 0.1892 | 1.2082781 | 6.591 × 10 | 2.871 | 0.004098 |

Length of direct operation sections | 1.652 × 10 | 1.0016530 | 9.982 × 10 | 1.655 | 0.098000 |