Table 4.
Difference in differences (DID) estimates: impact of calls on performance indicators in the intervention and postintervention stages.
| Dependent variable | Case activity | Form submissions (number) | Duration of counseling | |||||||
|
|
DID | t (df) | P | DID | t (df) | P | DID | t (df) | P | |
| Original sample (n=500) | ||||||||||
|
|
Treatment | –3.98 | –0.57 (499) |
.57 | –7.09 | –0.95 (499) |
.34 | –0.54 | –0.32 (499) |
.75 |
|
|
After | 9.07 | 2.65 (499) |
.008 | –32.32 | 8.20 (499) |
.001 | 0.57 | 0.77 (499) |
.44 |
|
|
Treatment×after | 5.58 | 0.98 (499) |
.33 | 2.032 | 0.29 (499) |
.77 | 4.78 | 3.66 (499) |
.001 |
|
|
Constant | 22.20 | 5.34 (499) |
.001 | 52.15 | 12.31 (499) |
.001 | 2.43 | 2.54 (499) |
.01 |
| Correcting for attrition (n=600) | ||||||||||
|
|
Treatment | –6.06 | –1.40 (599) |
.16 | –1.142 | –0.29 (599) |
.77 | –0.64 | –0.42 (599) |
.67 |
|
|
After | 12.71 | 4.52 (599) |
.001 | –25.36 | –7.77 (599) |
.001 | 0.746 | 1.09 (599) |
.27 |
|
|
Treatment×after | 4.45 | 1.2 (599) |
.023 | –1.39 | –0.37 (599) |
.71 | 4.34 | 3.65 (599) |
.001 |
|
|
Constant | 21.43 | 5.18 (599) |
.001 | 44.51 | 10.7 (599) |
.001 | 2.31 | 2.62 (599) |
.009 |