Table 3.
Comparison of results from three methods of regression analysis (Change in EQ5D)
| |
|
OLS on complete cases n = 688 [1]a |
OLS on MI dataset n = 1105 cases [2]b |
Heckman on complete cases n = 1105, 417 obs censored [3]c |
|||
|---|---|---|---|---|---|---|---|
| Variables | Coeff | S.E. | Coeff | S.E. | Coeff | S.E. | |
| Episode Characteristics |
Age in 2003 |
0.000 |
0.001 |
0.000 |
0.001 |
0.000 |
0.001 |
| Gender |
0.046 |
0.022* |
0.051 |
0.018** |
0.054 |
0.024* |
|
| Lives alone |
0.020 |
0.020 |
0.015 |
0.017 |
0.029 |
0.023 |
|
| Barthel score at admission |
0.017 |
0.003** |
0.017 |
0.002** |
0.016 |
0.003** |
|
| EQ5D score at admission |
−0.495 |
0.033** |
−0.479 |
0.026** |
−0.484 |
0.037** |
|
| Descriptors of IC Service |
Acute Admission Avoidance Service |
−0.038 |
0.027 |
−0.017 |
0.021 |
0.156 |
0.042** |
| Duration of Service Provision |
0.000 |
0.000 |
0.001 |
0.000* |
0.000 |
0.000 |
|
| Descriptors of IC-related Services |
Referral – Primary |
−0.031 |
0.052 |
−0.044 |
0.043 |
−0.020 |
0.058 |
| Referral – Hospital |
−0.098 |
0.051 |
−0.053 |
0.042 |
0.020 |
0.059 |
|
| Referral – Other |
−0.003 |
0.078 |
0.059 |
0.065 |
0.013 |
0.086 |
|
| Referral – Social Workers (Reference Group) |
|
|
|
|
|
|
|
| Alternative to IC – Other |
−0.063 |
0.031* |
−0.077 |
0.025** |
−0.077 |
0.030* |
|
| Alternative to IC – Home |
−0.045 |
0.023* |
−0.028 |
0.019 |
−0.046 |
0.022* |
|
| Alternative to IC – Hospital (Reference Group) |
|
|
|
|
|
|
|
| Interactions | Gender*Type of IC |
−0.048 |
0.053 |
−0.027 |
0.037 |
−0.057 |
0.053 |
| Barthel score at admission*Type of IC |
0.003 |
0.004 |
−0.002 |
0.003 |
0.004 |
0.004 |
|
| EQ5D score at admission *Type of IC |
−0.098 |
0.083 |
0.061 |
0.057 |
−0.118 |
0.082 |
|
| Acute Admission Avoidance Service*Type of IC |
0.110 |
0.064 |
0.039 |
0.039 |
0.086 |
0.063 |
|
| Alternative to IC – Other *Type of IC |
0.137 |
0.084 |
0.133 |
0.059* |
0.140 |
0.082 |
|
| Alternative to IC – Home*Type of IC |
0.086 |
0.106 |
−0.027 |
0.049 |
0.070 |
0.104 |
|
| Alternative to IC – Hospital *Type of IC (Reference Group) |
|
|
|
|
|
|
|
| _constant |
0.157 |
0.101 |
0.093 |
0.084 |
0.100 |
0.105 |
|
| N |
|
688 |
1,105 |
|
|
688 |
|
| Censored obs |
|
|
|
|
|
417 |
|
| R-Squared |
|
0.284 |
0.266 |
|
|
0.634 |
|
| Rho | 0.950 | ||||||
* 5% level of significance, ** 1% level of significance;
Dependent variable: change in EQ-5D, IC = Intermediate care
aMethod 1 assumes that missing data are MCAR; bMethod 2 assumes that missing data are MAR; cMethod 3 assumes that missing data are MNAR.