Table 3 Interrupted time series models for level and trend changes for mean total cost before and after implementation of the VDO program
Model 1: Intervention | Model 2: Model 1 + age, gender and subsidy status | Model 3: Model 2 + CCI and ASA score | ||||
|---|---|---|---|---|---|---|
Estimates | p-value | Estimates | p-value | Estimates | p-value | |
Intercept | 3110.10 (3035.73—3184.46) | < 0.01 | 4019.94 (1271.92—6767.98) | < 0.01 | 1270.57 (-1883.33—4424.47) | 0.43 |
Time | -0.28 (-4.65—4.10) | 0.90 | -2.46 (-9.150—4.226) | 0.47 | 0.60 (-5.65—6.86) | 0.85 |
Level | -283.76** (-409.06—-158.45) | < 0.01 | -284.10** (-425.08—-143.12) | < 0.01 | -327.23** (-421.04—-233.43) | < 0.01 |
Trend | -15.59** (-25.07—-6.11) | < 0.01 | -12.21 (-25.06—0.65) | 0.07 | -13.75** (-23.19—-4.30) | < 0.01 |
Age | -8.69 (-46.76—29.37) | 0.66 | -23.60 (-59.82—12.62) | 0.21 | ||
Gender | -36.09 (-989.69—917.52) | 0.94 | -117.40 (-920.28—685.47) | 0.78 | ||
Subsidy Status | -331.19 (-1142.24—479.85) | 0.43 | -266.69 (-989.59—456.22) | 0.47 | ||
CCI | 39.38 (-645.36—724.12) | 0.91 | ||||
ASA Score | 1710.91** (1089.18—2332.64) | < 0.01 | ||||