Table 1.
Comparison of the Degree of Mortality Deceleration at Advanced Ages Using Polynomial Regression Model
| Population | Parameter at quadratic term × 105 (95% CI) |
|---|---|
| 1881 birth cohort | −75.5 (−76.7, −74.4) |
| 1889 birth cohort | −38.3 (−38.9, −37.8) |
| 1894 birth cohort | 5.2 (4.7, 5.6) |
| 1891 birth cohort | |
| Northern group (more reliable data) | −18.7 (−19.6, −17.8) |
| Southern group (less reliable data) | −64.7 (−65.7, −63.6) |
| 1893 birth cohort | |
| Northern group (more reliable data) | −7.4 (−8.2, −6.6) |
| Southern group (less reliable data) | −18.3 (−19.2, −17.3) |
| 1891 birth cohort | |
| Yearly age intervals | −48.9 (−49.1, −48.6) |
| Monthly age intervals | −25.5 (−25.8, −25.1) |
Note: Logarithm of hazard rate after age 90 for a particular population was fitted by the polynomial regression model with a quadratic term.