Joinpoint models of covariate-adjusted annual ambulatory visit and hospital discharge rates
| Clinical paediatric encounter type | Annual percentage change (APC) or average annual percentage change (AAPC) | Time period | Rate of change (95% CI) | Adjusted R2 |
| Ambulatory visits | APC | 1993–1998 | −3.6 (−3.7 to −3.5) | |
| APC | 1998–2002 | −4.6 (−4.6 to −4.0) | ||
| APC | 2002–2006 | −5.2 (−5.4 to −5.1) | ||
| AAPC | 1993–2006 | −4.6 (−4.8 to −4.5) | 0.76 | |
| Hospital discharges | APC | 1993–2006 | −9.8 (−10.6 to −9.0) | |
| AAPC | 1993–2006 | −9.8 (−10.5 to −9.1) | 0.96 |