Table 1.
Comparison of men with intellectual ability test data available with the remaining source cohort
| Availability of intellectual ability test data | ||
| Data available | No data available | |
| 2786 (100%) | 1844 (100%) | |
| Year of birth | ||
| 1934 | 11 (0.4%) | 153 (8.3%) |
| 1935 | 84 (3.0%) | 90 (4.9%) |
| 1936 | 127 (4.6%) | 103 (5.6%) |
| 1937 | 136 (4.9%) | 97 (5.3%) |
| 1938 | 146 (5.2%) | 138 (7.5%) |
| 1939 | 185 (6.6%) | 132 (7.2%) |
| 1940 | 246 (8.8%) | 176 (9.5%) |
| 1941 | 375 (13.5%) | 261 (14.2%) |
| 1942 | 343 (12.3%) | 164 (8.9%) |
| 1943 | 463 (16.6%) | 231 (12.5%) |
| 1944 | 670 (24.0%) | 299 (10.8%) |
| Father's occupational status | ||
| Manual worker | 1721 (61.8%) | 1127 (61.1%) |
| Middle class | 1014 (36.4%) | 671 (36.4%) |
| Unknown | 51 (1.8%) | 46 (2.5%) |
| Mean (SD) body size at start of military service | ||
| Height (cm) | 176.4 (6.2) | 176.1 (6.1) |
| Body mass index (kg/m2) | 22.0 (2.5) | 22.0 (2.4) |
| Highest education achieved | ||
| Basic or less | 1064 (38.2%) | 702 (38.1%) |
| Upper secondary | 715 (25.7%) | 426 (23.1%) |
| Lower tertiary | 607 (21.8%) | 363 (19.7%) |
| Upper tertiary | 335 (12.0%) | 223 (12.1%) |
| Unknown | 65 (2.3%) | 130 (7.0%) |
| Dead in 2003 | 431 (15.5%) | 388 (21.0%) |
| Dead from cardiovascular disease (ICD 390–459; I00–I99) | 143 (5.1%) | 122 (6.6%) |
| Coronary heart disease (ICD 410–414; I21–I25) | 89 (3.2%) | 73 (4.0%) |
| Stroke (ICD 430–438; I60–I69) | 19 (0.7%) | 18 (1.0%) |
| Dead from non-cardiovascular causes | 283 (10.2%) | 261 (14.2%) |
| Dead from cancer (ICD 140–209; C00–C99) | 77 (2.8%) | 77 (4.2%) |
| Mean (SD) age at death (years) | 51.7 (7.7) | 50.6 (10.3) |
Cause of death unknown for five men with intellectual ability test data available and five men with data not available.