Table 2.
Coefficients (standard errors) estimating the rate of prescriptions of antidepressants per quarter among patients in the Inland Empire Health Program (n = 18,833) as a function of provider characteristics, time, whether the provider ever received the “Train the Trainer” program, and the interaction of time and provider receipt of the TNT program
| Antidepressants | (1) | (2) | (3) |
|---|---|---|---|
| Time |
0.003 (0.033) |
0.030 (0.033) |
0.030 (0.019) |
| TNT training |
− 0.265*** (0.004) |
− 0.087*** (0.004) |
− 0.087 (0.056) |
| Time*TNT training |
0.154*** (0.033) |
0.158*** (0.033) |
0.158* (0.092) |
| Provider Characteristic | |||
| Male gender (ref: female) |
0.010 (0.004) |
0.010 (0.022) |
|
| Specialty | |||
| Family Practice (Ref.) | |||
| General Practice |
− 0.143*** (0.076) |
− 0.143** (0.072) |
|
| Internal Medicine |
− 0.010** (0.005) |
− 0.010 (0.031) |
|
| Nurse |
0.144*** (0.007) |
0.144** (0.066) |
|
| Clinician Assistant |
0.331*** (0.012) |
0.331*** (0.030) |
|
| Age (yrs) | |||
| 30–39 (ref.) | |||
| 40–49 |
− 0.013*** (0.004) |
− 0.013 (0.022) |
|
| 50–59 |
0.109*** (0.006) |
0.109*** (0.034) |
|
| 60–69 |
0.050*** (0.006) |
0.050* (0.028) |
|
| 70–93 |
0.053*** (0.011) |
0.053 (0.076) |
|
| Quarterly trend |
0.000 (0.000) |
0.000 (0.002) |
|
| Seasonality | |||
| Jan.–Mar.(ref.) | |||
| Apr.–Jun. |
0.011*** (0.004) |
0.011*** (0.003) |
|
| Jul.–Sept. |
0.007* (0.004) |
0.007* (0.004) |
|
| Oct.–Dec. |
− 0.002 (0.004) |
− 0.002 (0.004) |
|
| Constant |
0.216*** (0.015) |
0.212*** (0.005) |
0.212*** (0.023) |
| R2 | 0.004 | 0.012 | 0.012 |
*p < 0.1; **p < 0.05; ***p < 0.01
Model 1 (left column) represents the base model;
Model 2 controls for provider characteristics, seasonality, and time trends.
Both Models 1 and 2 treat all patient observations as statistically independent.
Model 3 was clustered by providers using the “cluster” standard error estimation routine in STATA.