Baseline characteristics of 12 223 students from the Glasgow Alumni according to age group at baseline examination
| Age groups (years) | p Value‡ | ||||
|---|---|---|---|---|---|
| ⩽30 | 16–19 | 20–23 | 24–30 | ||
| BMI, body mass index. | |||||
| *Values are mean (standard deviation). | |||||
| †Median and interquartile range. | |||||
| ‡p Values are from χ2 test; one-way analysis of variance or Kruskal–Wallis test to compare the differences between three age groups. | |||||
| Number of students | 12 223 | 6376 | 4315 | 1532 | |
| Male students (%) | 9569 (78) | 4607 (72) | 3511 (81) | 1451 (95) | <0.001 |
| Father’s social class (%) | |||||
| I | 20.5 | 21.0 | 20.7 | 18.2 | 0.002 |
| II | 36.2 | 35.9 | 36.9 | 35.3 | |
| III | 36.3 | 36.0 | 36.4 | 37.4 | |
| IV/V | 6.9 | 7.1 | 6.0 | 9.1 | |
| Cigarette smoking (yes) (%) | 30.4 | 22.3 | 35.4 | 51.2 | <0.001 |
| Number of missing teeth (%) | |||||
| 0–4 | 64.1 | 65.3 | 66.0 | 53.9 | <0.001 |
| 5–8 | 27.6 | 28.0 | 26.5 | 29.4 | |
| ⩾9 | 8.3 | 6.7 | 7.5 | 16.7 | |
| BMI (kg/m2)* | 21.5 (2.3) | 21.4 (2.2) | 21.6 (2.3) | 22.0 (2.5) | <0.001 |
| Systolic blood pressure (mm Hg)* | 129.1 (13.1) | 128.7 (13.4) | 129.2 (13.1) | 131.0 (12.6) | <0.001 |
| Number of missing teeth* | 4.0 (3.7) | 3.8 (3.3) | 3.9 (3.6) | 5.2 (4.9) | <0.001 |
| Years of follow-up† | 46 (12) | 44 (11) | 46 (13) | 49 (13) | <0.001 |
| Deaths | |||||
| Total | 1635 | 567 | 603 | 465 | |
| From CVD | 596 | 172 | 226 | 198 | |
| From cancer | 624 | 227 | 233 | 164 | |
| From CHD | 405 | 127 | 157 | 121 | |
| From stroke | 123 | 31 | 42 | 50 | |