IQ score and all-cause mortality (1297 cases). Crude and adjusted relative risks (hazard ratios), with 95% confidence intervals, associated with one-point decrease in IQ score on the nine-point scale
| RR (CI 95%) | |
| Crude | 1.15 (1.12 to 1.18) |
| Adjusted for: | |
| A. Early life circumstances | |
| Low childhood SEP | 1.16 (1.13 to 1.19) |
| Crowded housing in childhood | 1.15 (1.12 to 1.18) |
| Body height | 1.15 (1.12 to 1.18) |
| All (A) | 1.15 (1.11 to 1.18) |
| B. Mental health and social adjustment measured at age 18 years | |
| Psychiatric diagnosis | 1.13 (1.10 to 1.16) |
| Contact with police and child care | 1.13 (1.10 to 1.16) |
| Low emotional control | 1.13 (1.10 to 1.16) |
| All (B) | 1.11 (1.08 to 1.14) |
| C. Behavioural factors measured at age 18 years | |
| Daily smoking | 1.13 (1.10 to 1.16) |
| Risky use of alcohol | 1.13 (1.10 to 1.16) |
| BMI | 1.15 (1.12 to 1.18) |
| All (C) | 1.11 (1.08 to 1.14) |
| All (B+C) | 1.09 (1.06 to 1.13) |
| D. Adult social position | |
| Attained education | 1.09 (1.06 to 1.13) |
| SEP at age 40 years | 1.08 (1.05 to 1.11) |
| Income at age 40 years | 1.09 (1.06 to 1.12) |
| All adult factors (D) | 1.04 (1.01 to 1.07) |
| All (B+C+D) | 1.02 (0.99 to 1.06) |