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Table 6 Quantile regressions on peak monthly TZD prescriptions in DDD, (n = 327 long-term adopters)

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

  Peak Monthly Prescriptions in DDD     Peak Monthly Prescriptions in DDD     Peak Monthly Prescriptions in DDD    
  25% quantile     50% quantile     75% quantile    
  Coefficient 95% CI    Coefficient 95% CI    Coefficent 95% CI   
Intercept -11683.46 (-25849.01 4891.88)   3087.64 (-1755.33 9708.63)   6092.86 (3040.05 13060.79) *
Initial time to adoption of TZD in month -40.33 (-90.40 -21.74) * -38.65 (-60.14 -18.79) * -32.29 (-40.34 -25.03) *
log (total DDD of DM in February, 2001) 144.32 (-23.53 501.21)   63.94 (-103.01 252.24)   -7.11 (-134.58 55.07)  
Number of doctors who prescribed TZD 56.75 (-0.63 128.80)   41.67 (23.84 71.43) * 35.51 (14.66 104.83) *
Prescription Speed (monthly growth on TZD prescription; DDD/month) 16.53 (10.99 18.80 ) * 24.91 (20.61 28.60) * 31.50 (28.04 35.07) *
Accreditation level             
   Ref: Medical Center             
   Regional Hospital 9572.52 (-9434.71 21541.35)   -3241.95 (-8473.35 4505.39)   -5666.94 (-20463.60 -1502.91) *
   District Hospital 8507.36 (-11661.53 22343.97)   -3801.32 (-9289.80 2804.17)   -5868.08 (-13770.06 -1838.18) *
NHI Regions             
   Ref: Taipei             
   Northern -1017.83 (-1835.78 -547.86) * -866.80 (-1422.52 -133.63) * -451.32 (-625.48 -233.11) *
   Central 70.82 (-410.31 368.95)   -95.32 (-304.72 272.10)   -28.60 (-251.57 172.36)  
   Southern -487.75 (-1144.62 -11.28) * -495.10 (-1015.13 -54.84) * -451.29 (-842.53 -2.09) *
   Kao-Ping -69.25 (-839.40 553.97)   179.82 (-143.65 823.57)   507.19 (105.50 1048.41) *
   Eastern 497.82 (-405.36 1013.11)   -63.27 (-652.49 235.63)   -375.01 (-651.40 -28.58) *
Ownership             
   Ref: Public Hospital             
   Non-profit Hospital 2478.04 (1309.10 5472.91) * 1081.43 (497.90 1751.43) * 725.85 (321.59 987.01) *
   Private Hospital 2521.98 (1138.68 4492.53) * 872.32 (344.70 1456.89) * 391.32 (159.27 658.54) *
  1. *: the 95% confident interval doesn't contain zero
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BMC Health Services Research

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