The correlation between the ratio of the numbers of CAFC day 7 to day 35, and the maximal lifespan of five mouse strains. Individual data points, obtained from young (•) or old (▴) mice are shown. The regression shows the relationship with the maximal lifespan of the respective strains. Lifespans for C3H/He is 500 days, for CBA/J 512 days, for DBA/2 710 days, for BALB/c 745 days, and for C57BL/6 789 days. The values of the correlation coefficients “r” are given, in addition to the level of significance (p).