Table 1

Comparison of men with intellectual ability test data available with the remaining source cohort

Availability of intellectual ability test data
Data availableNo data available
2786 (100%)1844 (100%)
Year of birth
 193411 (0.4%)153 (8.3%)
 193584 (3.0%)90 (4.9%)
 1936127 (4.6%)103 (5.6%)
 1937136 (4.9%)97 (5.3%)
 1938146 (5.2%)138 (7.5%)
 1939185 (6.6%)132 (7.2%)
 1940246 (8.8%)176 (9.5%)
 1941375 (13.5%)261 (14.2%)
 1942343 (12.3%)164 (8.9%)
 1943463 (16.6%)231 (12.5%)
 1944670 (24.0%)299 (10.8%)
Father's occupational status
 Manual worker1721 (61.8%)1127 (61.1%)
 Middle class1014 (36.4%)671 (36.4%)
 Unknown51 (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 less1064 (38.2%)702 (38.1%)
 Upper secondary715 (25.7%)426 (23.1%)
 Lower tertiary607 (21.8%)363 (19.7%)
 Upper tertiary335 (12.0%)223 (12.1%)
 Unknown65 (2.3%)130 (7.0%)
Dead in 2003431 (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 causes283 (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.