| British Women’s Heart and Health Study (born 1920–1939) (N = 4286) | National Survey of Health and Development (born 1946) (N = 1782) | |||||
| Total N | N (%) cases | Age-adjusted OR (95% CI) | Total N | N (%) cases | OR (95% CI) | |
| Own occupational class | ||||||
| I/II. Professional/managerial | 788 | 197 (25.0) | 1 | 588 | 129 (21.9) | 1 |
| IIInm. Skilled non-manual | 1330 | 309 (23.2) | 0.91 (0.74 to 1.11) | 611 | 150 (24.6) | 1.16 (0.89 to 1.51) |
| IIIm. Skilled manual | 290 | 63 (21.7) | 0.83 (0.60 to 1.15) | 120 | 31 (25.8) | 1.24 (0.79 to 1.95) |
| IV/V. Semi- or unskilled manual | 823 | 184 (22.4) | 0.86 (0.69 to 1.15) | 322 | 85 (26.4) | 1.28 (0.93 to 1.75) |
| Missing | 1055 | 168 (15.9) | 0.57 (0.45 to 0.72) | 141 | 31 (22.0) | 1.00 (0.64 to 1.56) |
| p Value* | 0.21 | 0.12 | ||||
| Head of household occupational class | ||||||
| I/II. Professional/managerial | 923 | 205 (22.2) | 1 | 873 | 207 (23.7) | 1 |
| IIInm. Skilled non-manual | 665 | 143 (21.5) | 0.96 (0.75 to 1.22) | 229 | 51 (22.3) | 0.92 (0.65 to 1.31) |
| IIIm. Skilled manual | 1116 | 270 (24.2) | 1.12 (0.91 to 1.37) | 453 | 118 (26.1) | 1.13 (0.87 to 1.47) |
| IV/V. Semi- or unskilled manual | 1078 | 237 (22.0) | 0.99 (0.80 to 1.22) | 206 | 47 (22.8) | 0.95 (0.66 to 1.36) |
| Missing | 504 | 66 (13.1) | 0.53 (0.39 to 0.71) | 21 | 3 (14.3) | 0.54 (0.16 to 1.84) |
| p Value* | 0.79 | 0.73 | ||||
| Age at leaving full-time education (years) | ||||||
| ⩾19 | 334 | 72 (21.6) | 1 | 62 | 10 (16.1) | 1 |
| 17–18 | 379 | 103 (27.2) | 1.36 (0.96 to 1.92) | 483 | 104 (21.5) | 1.43 (0.70 to 2.90) |
| 15–16 | 1813 | 424 (23.4) | 1.11 (0.84 to 1.47) | 1155 | 286 (24.8) | 1.71 (0.86 to 3.41) |
| ⩽14 | 1438 | 286 (19.9) | 0.90 (0.68 to 1.21) | – | – | – |
| Missing | 322 | 36 (11.2) | 0.46 (0.30 to 0.71) | 82 | 26 (31.7) | 2.41 (1.06 to 5.49) |
| p Value* | 0.04 | 0.05 | ||||
| Highest educational qualification† | ||||||
| University degree or higher | – | – | – | 91 | 12 (13.2) | 1 |
| A level or equivalent | – | – | – | 374 | 86 (23.0) | 1.97 (1.02 to 3.78) |
| O level or equivalent | – | – | – | 419 | 105 (25.1) | 2.20 (1.15 to 4.20) |
| CSE, clerical course or equivalent | – | – | – | 157 | 43 (27.4) | 2.48 (1.23 to 5.01) |
| No formal qualifications | – | – | – | 637 | 151 (23.7) | 2.05 (1.08 to 3.85) |
| Missing | – | – | – | 104 | 29 (27.9) | 2.55 (1.21 to 5.35) |
| p Value* | – | 0.23 | ||||
*From test for trend across categories, excluding missing category (italics).
†Not available in the British Women’s Heart and Health Study.