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Table 1 Regression coefficients, standard errors, and P-values from the multiple regression analysis type of segmented regression analysis of interrupted time series for models 1(total hospitalization 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
β1−14.7017.79−0.830.414−50.7134921.31188
β2−1022.06380.82−2.680.011− 1792.993− 251.1269
β3−125.3232.67−3.840.000− 191.4686− 59.17733
β017,110.64254.1967.320.00016,596.0617,625.21