Proportion of disability pension before age 30 in stratum of IQ
| Birth cohort | Low IQ | Medium IQ | High IQ |
|---|---|---|---|
| 1951–1955 | 2.47% (N=650) | 0.56% (N=899) | 0.28% (N=200) |
| 1956–1960 | 2.56% (N=577) | 0.53% (N=735) | 0.26% (N=139) |
| 1961–1965 | 2.82% (N=721) | 0.68% (N=1195) | 0.31% (N=199) |
| 1966–1970 | 2.48% (N=416) | 0.71% (N=943) | 0.32% (N=179) |
| 1971–1976 | 3.06% (N=888) | 0.83% (N=1548) | 0.40% (N=283) |