From: The impact of hospital accreditation on quality measures: an interrupted time series analysis
Model validation and parameter estimation | Diagnostic tests | ||||||||||||
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Anesthesia and Sedation Use Measures | Intercept | Time(β 1 ) | Intervention (β 2 ) (Change in level) | Tim_Aft_Int (β 3 ) (Change in slope) | R2 | Autocorrelation (AC) Check (Durbin Watson) | Test for Seasonality/Stationarity (Dickey Fuller Unit Root Test) | ||||||
Value | P-value | Value | P-value | Coefficient 95%Confidence Interval (LCI, UCI) | P-value | Coefficient 95%Confidence Interval (LCI, UCI) | P-value | D-Value (before) | D-Value (after) | P-value | Result | ||
Y 11 | 55.19 | 0.00* | 5.02 | 0.00* | −15.42(−23.38, −7.45) | 0.00* | −4.95(−6.12, −3.78) | 0.00* | 0.71 | 1.84 | No AC | 0.00 | No Seasonality |
Y 12 | 28.87 | 0.00* | 7.2 | 0.00* | −7.17(−12.11, −2.23) | 0.01* | −7.30(−8.49, −6.11) | 0.00* | 0.81 | 2.84 | 1.91 | 1.00 | Data is not Stationary |
Y 13 | 92.15 | 0.000* | 0.7 | 0.22 | 0.97(−4.86, 6.80) | 0.74 | −0.84(−1.98, 0.30) | 0.14 | 0.33 | 1.27 | 1.91 | 0.02 | No Seasonality |
Y 14 | 77.43 | 0.00* | 2.61 | 0.00* | −11.68(−20.04, −3.31) | 0.01* | −2.48(−4.07, −0.88) | 0.00* | 0.8 | 0.78 | 2.13 | 0.00 | No Seasonality |
Y 15 | 97.01 | 0.000* | 0.22 | 0.81 | −6.17(−14.37, 2.03) | 0.14 | −0.02(−1.90, 1.87) | 0.98 | 0.45 | 0.92 | 1.75 | 0.00 | No Seasonality |
Y 16 | 67.2 | 0.00* | 3.75 | 0.00* | −12.83(−21.63, −4.03) | 0.01* | −3.64(−4.94, −2.35) | 0.00* | 0.53 | 1.76 | No AC | 0.00 | No Seasonality |