Poisson model for the USA
| Variable | Coefficient | Standard error | p Value | 95% confidence interval |
|---|---|---|---|---|
| Sex | ||||
| Female | –0.243 | 0.030 | 0.000 | –0.285 to –0.201 |
| Age | ||||
| 45–49 | 0.555 | 0.082 | 0.000 | 0.394 to 0.715 |
| 50–54 | 1.042 | 0.076 | 0.000 | 0.893 to 1.192 |
| 55–59 | 1.494 | 0.073 | 0.000 | 1.351 to 1.636 |
| 60–64 | 1.916 | 0.071 | 0.000 | 1.778 to 2.056 |
| 65–69 | 2.233 | 0.070 | 0.000 | 2.096 to 2.370 |
| 70–74 | 2.478 | 0.070 | 0.000 | 2.341 to 2.616 |
| 75–79 | 2.661 | 0.071 | 0.000 | 2.521 to 2.800 |
| 80–84 | 2.974 | 0.073 | 0.000 | 2.521 to 2.800 |
| 85+ | 3.415 | 0.073 | 0.000 | 3.271 to 3.558 |
| Time period | ||||
| 1960–64 | –0.072 | 0.037 | 0.052 | –0.144 to 0.001 |
| 1965–69 | –0.179 | 0.037 | 0.000 | –0.252 to –0.107 |
| 1970–74 | –0.196 | 0.042 | 0.000 | –0.278 to –0.114 |
| 1975–79 | –0.389 | 0.043 | 0.000 | –0.473 to –0.304 |
| 1980–84 | –0.635 | 0.039 | 0.000 | –0.711 to –0.560 |
| 1985–89 | –0.821 | 0.040 | 0.000 | –0.900 to –0.743 |
| Constant | –13.85 | 0.068 | 0.000 | –13.987 to –13.717 |