Table 1.

Results of Ordinary Least Squares (OLS) Regression for Maximum Reported Age at Death as a Function of Year of Birth^a

Regression coefficient	Birth year range
	1860–1878	1879–1898
Slope	0.171*** (0.077, 0.265)	0.033 (–0.041, 0.108)
Intercept	115.17*** (114.04, 116.29)	115.41*** (114.60, 116.23)
Observations	18	21
Number of studied supercentenarians in the birth year range	179	1,254
R-squared	0.4830	0.0440

Note: GRG data. 95% confidence intervals shown in parentheses; *** p < .001.

^aYear of birth was mean-centered around the overall sample mean equal to 1,879.87 to avoid negative values for intercept parameter.