Table 2 Descriptive statistics of the early (born 1939–1959) and late (born 1983–2001) cohorts.
The early cohort | The late cohort | |||||||
|---|---|---|---|---|---|---|---|---|
Body mass index | Body mass index | |||||||
N | Percent % | Mean (95% CI) | SD | N | Percent % | Mean (95% CI) | SD | |
Quartile categorized intelligence test score | ||||||||
ITS score ≤ 31 | 68,333 | 26.4 | 21.80 (21.78; 21.82) | 2.7 | 41,091 | 25.3 | 24.83 (23.96; 24.04) | 4.4 |
ITS score 32–40 | 62,755 | 24.2 | 21.71 (21.68; 21.72) | 2.5 | 46,005 | 28.4 | 23.59 (23.56; 23.64) | 3.9 |
ITS score 41–48 | 63,110 | 24.4 | 21.60 (21.58; 21.62) | 2.4 | 35,268 | 21.7 | 23.32 (23.26; 23.34) | 3.7 |
ITS score ≥ 49 | 64,684 | 25.0 | 21.59 (21.58; 21.62) | 2.3 | 39,886 | 24.6 | 23.02 (22.97; 23.03) | 3.5 |
Total | 258,882 | 100 | 21.70 (21.69; 21.71) | 2.5 | 162,250 | 100 | 23.50 (23.48; 23.52) | 3.9 |
Geographical district | ||||||||
Metropolitan | 204,785 | 79.1 | 21.60 (21.59; 21.61) | 2.5 | 120,026 | 74.0 | 23.30 (23.28; 23.32) | 3.8 |
Provincial | 52,288 | 20.2 | 22.01 (21.98; 22.02) | 2.40 | 42,224 | 26.0 | 24.00 (23.96; 24.04) | 4.2 |
Missing | 1813 | 0.7 | – | – | – | – | – | – |
