Table 5 Results from the stratified Cox proportional hazard model estimation
From: Patenting and patent challenges in South Korea after introducing a patent linkage system
Coefficient | Standard Error | P-value | |
|---|---|---|---|
Drug type: Biologic (Ref. Chemical) | -3.17 | 1.24 | 0.0105 |
Statutory exclusivity: Yes (Ref. No) | 1.25 | 0.29 | < 0.0001 |
Manufacturer type: Foreign (Ref. Domestic) | 1.14 | 0.30 | 0.0001 |
Administration: Injection (Ref. Oral) | -0.41 | 0.63 | 0.5177 |
Administration: Others (Ref. Oral) | -0.33 | 0.51 | 0.5270 |
Patents | 0.48 | 0.23 | 0.0389 |
Market size | 0.65 | 0.29 | 0.0284 |
Number of manufacturers | -0.40 | 0.24 | 0.0999 |