Table 4.
Regression models of rehabilitation use and expenditure
| Variable(reference) | Average of frequencya IRR (95%CI) |
ln(Average annual cost)b β (95%CI) |
ln(Average total annual cost)b β (95%CI) |
|---|---|---|---|
| Constant | 14.054 (9.615–20.542)** | 10.024 (9.650–10.398)** | 7.492 (7.328–7.656)** |
| Year(2008) | |||
| 2009 | 1.123 (1.053–1.197)** | 0.192 (0.097–0.287)** | 0.033 (− 0.001–0.066) |
| 2010 | 1.116 (1.047–1.190)** | 0.133 (0.035–0.230)* | 0.013 (− 0.021–0.046) |
| Age(preschool age) | |||
| School age | 0.812 (0.768–0.858)** | − 0.350 (− 0.433- -0.268)* * | − 0.144 (− 0.172- -0.116)** |
| Gender (girl) | |||
| Boy | 1.009 (0.941–1.083) | − 0.074 (− 0.180–0.031) | − 0.078 (− 0.115- -0.041)** |
| Medical setting(Medical Center) | |||
| Metropolitan hospital | 1.231 (1.128–1.344)** | 0.334 (0.205–0.462)** | 0.128 (0.079–0.177)** |
| Local hospital | 1.139 (0.996–1.304) | 0.457 (0.264–0.650)** | 0.337 (0.268–0.406)** |
| Clinic | 1.188 (1.026–1.376)* | 0.196 (− 0.015–0.406) | 0.049 (− 0.026–0.123) |
| Teaching hospital(no) | |||
| Yes | 0.717 (0.638–0.805)** | −0.278 (− 0.443- -0.113)** | 0.080 (0.022–0.138)** |
| Location(East) | |||
| Taipei | 1.397 (0.983–1.987) | 0.384 (0.067–0.700)* | 0.269 (0.118–0.420)** |
| North | 1.687 (1.182–2.409)** | 0.579 (0.251–0.907)** | 0.284 (0.130–0.437)** |
| Central | 1.512 (1.056–2.165)* | 0.247 (−0.088–0.582) | 0.064 (− 0.092–0.221) |
| South | 1.434 (0.999–2.059) | 0.228 (−0.112–0.568) | 0.067 (− 0.094–0.228) |
| Kaohsiung and Pingtung | 1.704 (1.190–2.441)** | 0.625 (0.290–0.959)** | 0.307 (0.152–0.461)** |
Average frequency: total annual outpatient rehabilitation visits/annual number of patients
Average cost/claim point: average universal outpatient claim
Average total annual cost/claim point: Average cost × average frequency
aNegative binomial model reporting incidence-rate ratios
bNatural logarithm of costs using multiple linear regression
*p < 0.05
**p < 0.01