Table 4.
Regression results. The model included time controls, location controls, and patient fixed effects.
| Variables | Patient-initiated messages | |||
| IRRa | 95% CI | P value | ||
| Monthly provider-initiated messaging |
|
|
|
|
|
|
No provider-initiated messaging last month | 1.00 | Referent |
|
|
|
Low provider-initiated messaging last month | 1.18 | 1.12-1.24 | < .001 b |
|
|
Medium provider-initiated messaging last month | 1.23 | 1.17-1.30 | < .001 |
|
|
High provider-initiated messaging last month | 1.60 | 1.51-1.70 | < .001 |
| Monthly provider-response messaging |
|
|
|
|
|
|
No provider-response messaging last month | 1.00 | Referent |
|
|
|
Low provider-response messaging last month | 2.67 | 2.53-2.82 | < .001 |
|
|
Medium provider-response messaging last month | 3.54 | 3.37-3.73 | < .001 |
|
|
High provider-response messaging last month | 4.34 | 4.13-4.55 | < .001 |
| Primary care visits last month | 1.14 | 1.12-1.15 | < .001 | |
| Emergency room visits last month | 1.02 | 0.97-1.07 | .49 | |
| Specialty care visits last month | 1.00 | 0.99-1.01 | .21 | |
| Musculoskeletal diagnosis within the previous 3 months | 1.14 | 1.10-1.19 | < .001 | |
| Mental health diagnosis within the previous 3 months | 1.01 | 0.95-1.07 | .76 | |
| Hypertension diagnosis within the previous 3 months | 1.00 | 0.92-1.07 | .92 | |
| Sleep apnea diagnosis within the previous 3 months | 1.01 | 0.96-1.07 | .64 | |
| Dyslipidemia diagnosis within the previous 3 months | 1.13 | 1.08-1.19 | < .001 | |
aIRR: incidence rate ratio.
bP value in italics indicate statistical significance (P<.05).