Table 2.
Overall percent distributions of asthma indicators, 2006 to 2010
| 2006 | 2007 | 2008 | 2009 | 2010 | 2006 to 2010 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Asthma indicators | % | 95% CI | % | 95% CI | % | 95% CI | % | 95% CI | % | 95% CI | % change | 95% CI | p-value for trend |
| Process-related indicators | |||||||||||||
| Use of spirometry | |||||||||||||
| To diagnose asthma | 46.8 | (46.2, 47.5) | 48.8 | (48.1, 49.5) | 49.9 | (49.2, 50.7) | 51.0 | (50.3, 51.8) | 52.5 | (51.6, 53.5) | 12.2 | (10.3, 14.0) | <0.001 |
| To monitor asthma | 16.4 | (16.2, 16.5) | 17.0 | (16.9, 17.2) | 17.2 | (17.1, 17.4) | 17.7 | (17.6, 17.9) | 19.1 | (18.9, 19.2) | 16.5 | (15.2, 17.8) | <0.001 |
| Asthma medication prescriptions (in patients ≥65 years old) | |||||||||||||
| Inhaled corticosteroids | 72.9 | (72.1, 73.7) | 74.2 | (73.3, 75.0) | 74.7 | (73.8, 75.5) | 75.2 | (74.4, 76.1) | 76.6 | (75.8, 77.5) | 5.1 | (4.3, 6.0) | <0.001 |
| Short acting β2-agonist | 60.5 | (59.7, 61.2) | 60.7 | (59.9, 61.4) | 58.2 | (57.4, 58.9) | 57.8 | (57.0, 58.5) | 58.5 | (57.8, 59.3) | −3.3 | (−4.3, −2.1) | <0.001 |
| ≤4 canisters per year | 56.6 | (55.7, 57.6) | 57.7 | (56.7, 58.6) | 60.5 | (59.5, 61.5) | 61.2 | (60.2, 62.3) | 61.6 | (60.6, 62.7) | 8.8 | (7.3, 10.5) | <.0001 |
| 5-12 canisters per year | 30.3 | (29.6, 31.0) | 30.4 | (29.7, 31.1) | 29.3 | (28.6, 30.0) | 29.0 | (28.3, 29.7) | 29.4 | (28.7, 30.1) | −3.0 | (−5.5, −0.2) | 0.0008 |
| 13-20 canisters per year | 8.7 | (8.3, 9.1) | 8.2 | (7.9, 8.6) | 7.3 | (7.0, 7.7) | 7.1 | (6.8, 7.5) | 6.5 | (6.2, 6.9) | −25.3 | (−29.4, −20.0) | <.0001 |
| >20 canisters per year | 4.4 | (4.1, 4.6) | 3.7 | (3.5, 4.0) | 2.9 | (2.7, 3.1) | 2.7 | (2.5, 2.9) | 2.4 | (2.2, 2.6) | −45.5 | (−50.5, −39.5) | <.0001 |
| Outcome-related indicators | |||||||||||||
| Asthma specific health services use | |||||||||||||
| Primary care visits | 20.8 | (20.8, 20.9) | 20.0 | (19.9, 20.1) | 18.4 | (18.3, 18.5) | 17.5 | (17.4, 17.5) | 17.1 | (17.0, 17.1) | −17.8 | (−18.4, −17.7) | <0.001 |
| Emergency department visits | 2.4 | (2.4, 2.4) | 2.2 | (2.2, 2.2) | 1.9 | (1.9, 1.9) | 1.8 | (1.8, 1.8) | 1.7 | (1.7, 1.7) | −29.2 | (−30.0, −27.9) | <0.001 |
| Other health services use | |||||||||||||
| Primary care visits | 86.2 | (86.1, 86.4) | 84.9 | (84.8, 85.0) | 83.4 | (83.3, 83.6) | 83.8 | (83.7, 83.9) | 83.1 | (83.0, 83.2) | −3.6 | (−3.9, 3.4) | <0.0001 |
| Emergency department visits | 26.1 | (26.0, 26.1) | 25.9 | (25.9, 26.0) | 25.8 | (25.7, 25.8) | 25.7 | (25.6, 25.8) | 25.9 | (25.8, 26.0) | −0.8 | (−1.1, 0.0) | <0.0001 |
Note: p-value is based on the Cochran-Armitage test for trend for multiple proportions.