Table 4 Regression coefficients, standard errors, and P-values from the multiple regression analysis type of segmented regression analysis of interrupted time series for models 2(drug expenses as the dependent variable)
coefficients | robust std. error | t | sig | 95% Conf. Interval | ||
|---|---|---|---|---|---|---|
β1 | −46.42 | 9.23 | −5.03 | 0.000 | −65.10885 | −27.73629 |
β2 | −1073.58 | 197.60 | −5.43 | 0.000 | − 1473.601 | − 673.5567 |
β3 | −19.88 | 16.95 | −1.17 | 0.248 | −54.20093 | 14.44242 |
β0 | 7905.49 | 131.89 | 59.94 | 0.000 | 7638.487 | 8172.492 |