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Table 3 ARIMA modelling parameter estimates of epoetin (B03XA01)

From: The impact of policy interventions to promote the uptake of biosimilar medicines in Belgium: a nationwide interrupted time series analysis

Parameter

Estimate*

Standard error (SE)

95% Confidence interval (CI)

P-value

Step change for intervention 1

3222.543

1921.798

−544.181 to 6989.267

0.105

Ramp for intervention 1

−449.820

219.537

−880.113 to −19.527

0.050

Step change for intervention 2

−2809.648

2712.044

−8125.254 to 2505.958

0.309

Ramp for intervention 2

2733.692

553.594

1648.648 to 3818.736

 < 0.001

  1. ARIMA specification (0,1,0); R2 = 0.986; Ljung–Box Q estimate = 18.738 (P = 0.408). *No transformation has been performed
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Health Research Policy and Systems

ISSN: 1478-4505

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