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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)

From: Impacts of the zero mark-up drug policy on hospitalization expenses of COPD inpatients in Sichuan province, western China: an interrupted time series analysis

 coefficientsrobust std. errortsig95% Conf. Interval
β1−46.429.23−5.030.000−65.10885−27.73629
β2−1073.58197.60−5.430.000− 1473.601− 673.5567
β3−19.8816.95−1.170.248−54.2009314.44242
β07905.49131.8959.940.0007638.4878172.492