Multivariable regression analysis between intravenous tissue plasminogen activator (IV-rt PA) and influential factors
| Parameter | Estimate (β) | Standardised (β) | SE | t ratio | P value* |
| Per capita GRP (¥ 10 000) | 2.37 | 0.23 | 0.16 | 14.92 | <0.001 |
| Stroke centre type (PSC as reference group) | 3.77 | 0.06 | 0.98 | 3.85 | <0.001 |
| Neurologists number | 0.12 | 0.06 | 0.03 | 3.52 | <0.001 |
| Providing emergence service for neurological treatment (no (0) as reference group) | 7.43 | 0.04 | 3.02 | 2.46 | 0.014 |
| Presence of ED (no (0) as reference group) | 10.03 | 0.04 | 4.27 | 2.35 | 0.019 |
| Cooperating with emergency centre (no (0) as reference group) | 4.65 | 0.03 | 2.14 | 2.18 | 0.029 |
| Year: 2016 (2015 as reference group) | −3.71 | −0.06 | 1.44 | −2.58 | 0.010 |
| Year: 2018 | 4.44 | 0.07 | 1.40 | 3.16 | 0.002 |
| Year: 2019 | 7.79 | 0.13 | 1.45 | 5.38 | <0.001 |
r2=0.11; p<0.0001.
*Variables were selected by using backward stepwise model selection method. VIF of each variable in this model is around 1, which indicates no multicollinearity issue. (online supplement table 1)
ED, emergency department; GRP, gross regional product; PSC, primary stroke centre.