Multivariable associations between intelligence and telomere length at T3.

1Age in years at T2.2Body mass index in kg/m2.3Smoking in number of cigarettes/day with “0” = 0, “1” = 1–5, “2” = 6–10, “3” = 11–15, “4” = 16–20”, “5” = >20.4Frequency of exercise with “0” = no exercise, “1” = once/week, “2” = twice or more/week.5Educational level with “1” = none, “2” = low, “3” = middle, “4” = high.6Work situation with “1” = unwillingly unemployed, “2” = willingly unemployed, “3” = employed.7Household income divided by the square root of number of people living with this income.