Table 4.
GEE estimates of selected asthma outcomes over time for Symptom Free Days, Hospitalizations and ED visits
| Parameter | Estimate† | p |
|---|---|---|
| Symptom-Free Days | ||
| Time | 2.20 | 0.03 |
| Baseline Symptom Free Days | 0.57 | 0.001 |
| Breathmobile only | −0.59 | 0.50 |
| FACI only | −0.85 | 0.33 |
| Breathmobile+FACI | −0.36 | 0.69 |
| Breathmobile only* time2 | 1.92 | 0.17 |
| FACI only* time2 | 2.14 | 0.11 |
| Breathmobile+FACI* time2 | 3.43 | 0.01 |
| Breathmobile only* time3 | 0.12 | 0.93 |
| FACI only* time3 | −0.01 | 0.99 |
| Breathmobile+FACI* time3 | 0.35 | 0.81 |
| Hospitalizations | ||
| Time | 0.35 | 0.04 |
| Baseline Hospitalizations | 1.82 | 0.001 |
| Breathmobile only | 1.07 | 0.83 |
| FACI only | 0.51 | 0.08 |
| Breathmobile+FACI | 1.23 | 0.57 |
| Breathmobile only* time2 | 0.77 | 0.68 |
| FACI only* time2 | 0.98 | 0.98 |
| Breathmobile+FACI* time2 | 0.23 | 0.08 |
| Breathmobile only* time3 | 1.81 | 0.40 |
| FACI only* time3 | 1.59 | 0.51 |
| Breathmobile+FACI* time3 | 0.45 | 0.39 |
| ED visits | ||
| Time | 0.49 | 0.001 |
| Baseline ED visits | 1.29 | 0.001 |
| Breathmobile only | 0.59 | 0.001 |
| FACI only | 0.87 | 0.29 |
| Breathmobile+FACI | 0.91 | 0.51 |
| Breathmobile only* time2 | 0.99 | 0.99 |
| FACI only* time2 | 1.69 | 0.01 |
| Breathmobile+FACI* time2 | 1.19 | 0.45 |
| Breathmobile only* time3 | 1.24 | 0.35 |
| FACI only* time3 | 1.00 | 0.99 |
| Breathmobile+FACI* time3 | 0.35 | 0.81 |
†
Parameter estimates for ED visits and hospitalizations are based on Incidence Rate Ratio (IRR). The estimates for symptom-free days are based on unstandardized regression coefficient (b).