| Regression coefficient | Standard error | t value | p value |
Intercept | −1.176 × 10−15 | 1.706 × 10−2 | 0 | 1 |
Length of train lines | 0.2802 | 3.318 × 10−2 | 8.446 | <2 × 10−16 |
Number of through service train lines | 8.866 × 10−2 | 3.008 × 10−2 | 2.947 | 0.00324 |
Length of through service sections | 6.417 × 10−2 | 3.693 × 10−2 | 1.738 | 0.08238 |
Number of operating trains per hour during peak hours | −0.1209 | 2.800 × 10−2 | −4.317 | 1.63 × 10−5 |
Number of transported passengers per hour during peak hours | 0.2075 | 3.622 × 10−2 | 5.728 | 1.12 × 10−8 |
Number of stairs and escalators in terminal stations | −7.447 × 10−2 | 2.708 × 10−2 | −2.750 | 0.00600 |
Number of trains according to type | −0.1604 | 2.778 × 10−2 | −5.773 | 8.65 × 10−9 |
Number of connecting operation stations | −0.2714 | 4.819 × 10−2 | −5.633 | 1.95 × 10−8 |
Length of lines with connecting operation | 0.2655 | 4.922 × 10−2 | 5.395 | 7.44 × 10−8 |