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Table 5 Quantile regressions on monthly growth of TZD prescriptions, (n = 327 long-term adopters)

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

 

Speed of TZD prescription (Monthly Growth on Total DDD of TZD)

  

Speed of TZD prescription (Monthly Growth on Total DDD of TZD)

  

Speed of TZD prescription (Monthly Growth on Total DDD of TZD)

  
 

25% quantile

  

50% quantile

  

75% quantile

  
 

Coefficient

95% CI

 

Coefficient

95% CI

 

Coefficient

95% CI

 

Intercept

57.14

(-73.90 149.35)

 

143.87

(-125.85 474.82)

 

248.98

(-142.24 1045.51)

 

Initial time to adoption of TZD in month

0.60

(-0.17 0.99 )

 

0.47

(-0.81 0.82)

 

0.13

(-0.57 1.86)

 

log (total DDD of DM in February, 2001)

18.29

(12.14 27.75)

*

25.57

(14.74 34.87)

*

30.97

(17.17 40.80)

*

HHI in February, 2001(unit: HHI*100)

-7.88

(-55.35 45.67)

 

10.81

(-78.56 90.25)

 

67.73

(-46.51 180.98)

 

Number of doctors who prescribed TZD

2.65

(0.71 4.49 )

*

3.14

(1.44 5.20)

*

4.25

(1.19 6.30)

*

Accreditation level

         

   Ref: Medical Center

         

   Regional Hospital

-193.39

(-355.21 396.19)

 

-326.44

(-577.59 -35.84)

*

-295.57

(-962.53 159.11)

 

   District Hospital

-249.47

(-410.38 451.57)

 

-394.48

(-647.42 -101.94)

*

-486.58

(-1351.85 -32.69)

*

NHI Regions

         

   Ref: Taipei

         

   Northern

-20.33

(-30.27 -1.70)

*

-23.94

(-58.11 52.29)

 

-11.05

(-93.18 51.03)

 

   Central

2.85

(-4.73 15.90)

 

18.64

(-34.77 49.89)

 

-40.12

(-89.09 -2.39)

*

   Southern

6.93

(-10.92 20.61)

 

7.90

(-23.38 45.70)

 

-22.49

(-67.47 119.84)

 

   Kao-Ping

-4.05

(-18.10 10.18 )

 

2.64

(-37.65 32.81)

 

-69.48

(-112.26 -16.17)

*

   Eastern

-38.15

(-60.45 -27.91)

*

-71.45

(-104.30 -50.74)

*

-114.75

(-171.58 - 36.97)

 

Ownership

         

   Ref: Public Hospital

         

   Non-profit Hospital

74.52

(42.13 95.49)

*

103.08

(30.75 130.09)

*

73.89

(-0.08 145.26)

 

   Private Hospital

53.95

(30.05 71.65)

*

66.10

(12.52 91.35)

*

77.15

(37.58 112.26)

*

  1. *: the 95% confident interval doesn't contain zero