Table 2 Patient assessment and laboratory safety measures
From: The impact of hospital accreditation on quality measures: an interrupted time series analysis
Model validation and parameter estimation | Diagnostic tests | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Patient assessment measures | Intercept | Time(β1) | Intervention (β2) (Change in level) | Tim_Aft_Int (β3) (Change in slope) | R2 | Autocorrelation (AC) Check | Test for Seasonality/Stationarity | ||||||
(Durbin Watson) | (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 | R2 | D-Value (before) | D-Value (after) | P-value | Result | |
Y 1 | 78.60 | 0.00* | 1.19 | 0.35 | −4.54 (−16.33 to 7.25) | 0.44 | −0.99(−3.63 to 1.65) | 0.45 | 0.38 | 1.00 | 1.92 | 0.03 | No Seasonality |
Y 2 | 96.17 | 0.00* | 0.13 | 0.53 | 1.24 (−1.63 to 4.11) | 0.38 | −0.18 (−0.60 to 0.24) | 0.39 | 0.09 | 1.46 | No AC | 0.00 | No Seasonality |
Y 3 | 94.56 | 0.00* | 0.16 | 0.85 | −4.00 (−12.10 to 4.10) | 0.33 | −0.02 (−1.82 to 1.77) | 0.98 | 0.34 | 1.05 | 2.22 | 0.04 | No Seasonality |
Y 4 | 32.56 | 0.00* | 7.02 | 0.00* | −13.91 (−32.37 to 4.56) | 0.14 | −7.28 (−10.00 to −4.56) | 0.00* | 0.48 | 1.72 | No AC | 0.00 | No Seasonality |
Laboratory safety measures | |||||||||||||
Y 5 (in hours) | 7.06 | 0.00* | −0.36 | 0.00* | 0.34(0.13, 0.54) | 0.52 | 0.34(0.04, 0.64) | 0.00* | 0.73 | 1.31 | 2.11 | 0.04 | No Seasonality |
Y 6 (minutes) | 47.58 | 0.00* | 0.15 | 0.46 | −0.43(−2.99, 2.13) | 0.74 | −0.60(−1.02, −0.18) | 0.01* | 0.90 | 1.85 | No AC | 0.95 | Data is not stationary |