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Table 4 Cox proportional hazards models on initial time of adoption of TZD Unit:(month)

From: Diffusion patterns of new anti-diabetic drugs into hospitals in Taiwan: the case of Thiazolidinediones for diabetes

  580 hospitals (total) initial time to adoption of TZD (month)     327 hospitals (adopters only) initial time to adoption of TZD (month)    
  HR1 95% CI p-value   HR1 95% CI p-value  
HHI in February, 2001 (unit: HHI*100) 0.02 (0.01 0.04) 0.0000 *** 0.07 (0.03 0.18) 0.0000 ***
Accreditation level         
   ref: Medical Center         
   Regional Hospital 0.75 (0.43 1.32) 0.3000   1.01 (0.56 1.81) 0.9700  
   District Hospital 0.43 (0.24-0.75) 0.0024 ** 0.53 (0.3 0.94) 0.0260 *
BNHI Regions         
   Ref: Taipei         
   Northern 0.6 (0.41 0.89) 0.0090 * 0.65 (0.44 0.96) 0.0280 *
   Central 0.88 (0.63 1.23) 0.4500   0.82 (0.58 1.14) 0.2300  
   Southern 0.75 (0.52 1.09) 0.1200   0.83 (0.57 1.21) 0.3300  
   Kao-Ping 0.58 (0.41 0.82) 0.0015 ** 0.98 (0.69 1.4) 0.9200  
   Eastern 0.69 (0.37 1.27) 0.2300   0.7 (0.37 1.32) 0.2600  
Ownership         
   ref: Public Hospital         
   Non-profit Hospital 1.79 (1.23 2.61) 0.0019 ** 1.87 (1.26 2.78) 0.0015 **
   Private Hospital 1.35 (0.94 1.94) 0.0950   2.14 (1.49 3.06) 0.0000 ***
  1. 1: hazard ratio; HR < 1 means the factor inhibited adoption and an HR > 1 means the factor accelerated adoption
  2. ***: p < 0.0005 **: p < 0.005 *:p < 0.05