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. 2023 Sep 5;14:984794. doi: 10.3389/fphar.2023.984794

TABLE 6.

The result of ITS analysis of selected medications between branded drugs and generic drugs in the “4 + 7”pilot cities.

Categories DDDs (ten thousand) Expenditures (ten thousand CNY) DDDc (CNY)
Coef. (95%C.I.) p-value Coef. (95%C.I.) p-value Coef. (95%C.I.) p-value
Entecavir
Branded drugs
Baseline trend β 1 −0.24 (−1.25,0.77) 0.630 −6.22 (−31.66,19.22) 0.616 −0.02 (−0.11,0.06) 0.602
Change in level β 2 −2.98 (−15.72,9.76) 0.631 −604.63 (−926.31,-282.95) 0.001 −5.29 (−6.35,-4.23) <0.001
Change in slope β 3 −1.87 (−3.82,0.08) 0.059 −52.81 (−101.87,-3.75) 0.036 −0.19 (−0.35,-0.02) 0.028
Constant β 0 97.99 (90.31,105.67) <0.001 2657.37 (2464.08,2850.66) <0.001 27.25 (26.60,27.90) <0.001
Generic drugs
Baseline trend β 1 7.16 (−7.27,21.58) 0.313 59.36 (9.13,109.58) 0.023 −0.08 (−0.14,-0.03) 0.004
Change in level β 2 525.07 (342.72,707.42) <0.001 −3799.79 (−4435.92,-3163.67) <0.001 −8.66 (−9.31,-8.00) <0.001
Change in slope β 3 −6.79 (−34.61,21.03) 0.616 −147.06 (−244.04,-50.08) 0.005 −0.04 (−0.14,0.07) 0.443
Constant β 0 388.74 (279.12,498.37) <0.001 4356.54 (3974.49,4738.58) <0.001 11.44 (11.02,11.86) <0.001
Tenofovir Fumarate
Branded drugs
Baseline trend β 1 1.13 (−0.02,2.28) 0.055 1.13 (−0.02,2.28) 0.055 0.00 (−0.06,0.07) 0.914
Change in level β 2 −12.01 (−26.55,2.53) 0.100 −12.01 (−26.55,2.53) 0.100 −3.46 (−4.30,-2.63) <0.001
Change in slope β 3 −1.15 (−3.37,1.07) 0.293 −1.15 (−3.37,1.07) 0.293 −0.15 (−0.28,-0.02) 0.024
Constant β 0 46.48 (37.73,55.24) <0.001 46.48 (37.73,55.24) <0.001 13.32 (12.81,13.84) <0.001
Generic drugs
Baseline trend β 1 3.41 (0.78,6.04) 0.014 42.54 (30.87,54.20) <0.001 −0.01 (−0.05,0.03) 0.574
Change in level β 2 109.43 (76.49,142.37) <0.001 −473.18 (−620.34,-326.01) <0.001 −10.99 (−11.44,-10.55) <0.001
Change in slope β 3 0.20 (−4.88,5.28) 0.935 −56.07 (−78.58,-33.56) <0.001 −0.08 (−0.15,-0.02) 0.018
Constant β 0 11.82 (−8.21,31.84) 0.233 151.47 (62.77,240.16) 0.002 12.72 (12.44,12.99) <0.001
Selected medications
Branded drugs
Baseline trend β 1 0.89 (−1.15,2.92) 0.375 9.83 (−26.50,46.16) 0.579 −0.08 (−0.17,0.01) 0.087
Change in level β 2 −14.87 (−40.59,10.85) 0.242 −955.25 (−1414.79,-495.70) <0.001 −4.21 (−5.34,-3.09) <0.001
Change in slope β 3 −3.03 (−6.96,0.90) 0.124 −75.24 (−145.31,-5.18) 0.037 −0.16 (−0.34,0.01) 0.065
Constant β 0 144.48 (128.99,159.97) <0.001 3272.92 (2996.87,3548.96) <0.001 22.75 (22.06,23.43) <0.001
Generic drugs
Baseline trend β 1 10.59 (−5.95,27.13) 0.197 102.56 (45.58,159.54) 0.001 −0.07 (−0.13,-0.02) 0.015
Change in level β 2 633.46 (424.53,842.39) <0.001 −4285.32 (−5006.99,-3563.66) <0.001 −8.86 (−9.52,-8.20) <0.001
Change in slope β 3 −6.46 (−38.36,25.44) 0.677 −203.21 (−313.21,-93.21) 0.001 −0.05 (−0.16,0.06) 0.332
Constant β 0 400.53 (274.84,526.22) <0.001 4505.03 (4071.67,4938.39) <0.001 11.49 (11.06,11.91) <0.001

ITS: interrupted time series; DDDs: Defined Daily Doses; DDDc: Defined Daily Drug cost; CNY: Chinese Yuan. The bold value meaning was classification of antiviral medications of hepatitis B virus in this study.