Piecewise linear regression models with mortality rate in 434 Norwegian municipalities as dependent variable and population density and travel time to hospital care in minutes as predictors
| Univariate models | Multiple model 4 | |||||||
|---|---|---|---|---|---|---|---|---|
| Explanatory variable | Estimate (95% CI) | p Value | AIC | Radj2 | Estimate (95% CI) | p Value | AIC | Radj2 |
| log (population density) | 3402.2 | 0.242 | 3397.1 | 0.252 | ||||
| Breakpoint | 0.81 (0.17 to 1.44) | 0.79 (0.08 to 1.51) | ||||||
| Below break | −13.9 (−23.5 to −4.32) | 0.005 | −12.3 (−21.8 to −2.7) | 0.012 | ||||
| Above break | −2.02 (−2.45 to −1.59) | <0.001 | −1.77 (−2.33 to −1.20) | <0.001 | ||||
| log(travel time) | 3448.4 | 0.157 | ||||||
| Breakpoint | 2.32 (2.05 to 2.59) | 2.37 (1.93 to 2.80) | ||||||
| Below break | −5.45 (−10.5 to −0.37) | 0.036 | −4.82 (−9.61 to −0.03) | 0.054 | ||||
| Above break | 5.80 (4.12 to 7.49) | <0.001 | 2.14 (0.28 to 4.01) | 0.024 | ||||
Weighted by municipality population.
AIC, Akaike's information criterion.