Relationship between frailty and age by country and sex.

Note:***denote significance at the 1 percent level. 95% confidence intervals are reported in parentheses. These are the slope coefficients and intercepts of the regression lines from Figures 3 and 4. The dependent variable is log(Age specific frailty index) and the only independent variable is age. The sample size is 36 (ages between 50 and 85).