Table 1.
Estimated annual percent changes (APC) in COPD hospitalization rates by age, sex and race in Massachusetts, 1989–2005
| Variables | Year | APC (95% confidence interval) |
|---|---|---|
| Age (in years) | ||
| 0–14 | 1989–93 | 2.5 (−6.1; 11.9) |
| 1993–96 | −20.9 (−43.3; 10.3) | |
| 1997–2005 | 0.73 (−2.7; 4.3) | |
| 15–44 | 1989–93 | 2.1 (−2.9; 7.4) |
| 1993–2005 | −4.4 (−5.4; −3.4)a | |
| 45–64 | 1989–93 | 9.3 (5.4; 13.4)a |
| 1993–2005 | −1.3 (−1.9; −0.6)a | |
| 65–84 | 1989–93 | 24.5 (18.1; 31.3)a |
| 1993–2005 | 0.06 (−0.7; 0.8) | |
| Sex | ||
| Males | 1989–93 | 13.4 (9.4; 17.6)a |
| 1993–96 | −7.1 (−16.5; 3.3) | |
| 1996–2005 | −0.4 (−1.4; 0.6) | |
| Females | 1989–93 | 10.3 (6.8; 13.9)a |
| 1993–2005 | −1.6 (−2.1; −1.0)a | |
| Race | ||
| Whites | 1990–92 | 20.3 (0.3; 44.2)a |
| 1992–2005 | −0.7 (−1.6; 0.1) | |
| Blacks | 1990–93 | 9.7 (2.8; 17.0)a |
| 1993–2000 | −6.7 (−8.8; −4.6)a | |
| 2000–05 | −1.2 (−4.5; 2.3) | |
| Hispanics | 1990–2005 | −1.5 (−2.9; −0.05)a |
aStatistically different from ‘zero’ at P = 0.05.