Table 2 Cox regression analysis: indicators of socioeconomic status and risk of ischaemic heart disease (IHD).
| Men* | IHD (ICD‐9 410–414) | Acute myocardial infarction (ICD‐9 410) | Acute/subacute IHD (ICD‐9 411) | Angina pectoris (ICD‐9 413) | Chronic IHD (ICD‐9 414) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| n (%) diseased | HR (95% CI) | n (%) diseased | HR (95% CI) | n (%) diseased | HR (95%‐CI) | n (%) diseased | HR (95% CI) | n (%) diseased | HR (95% CI) | |
| Model 1 | ||||||||||
| Education and training | ||||||||||
| ⩽10 years without vocational training | 38 (0.5) | 0.60 (0.46 to 0.78) | 11 (0.2) | 0.70 (0.47 to 1.04) | 3 (0.05%) | 0.99 (0.38 to 2.62) | 10 (0.2) | 0.60 (0.37 to 0.98) | 14 (0.2%) | 0.51 (0.33 to 0.78) |
| ⩽10 years with vocational training | 105 (0.4) | 0.30 (0.25 to 0.37) | 33 (0.2) | 0.26 (0.19 to 0.37) | 8 (0.04%) | 0.48 (0.21 to 1.07) | 46 (0.3) | 0.43 (0.30 to 0.61) | 31 (0.2%) | 0.23 (0.16 to 0.32) |
| >12 years, college/university degree | 153 (1.8) | 1.0 | 63 (0.9) | 1.0 | 8 (0.1%) | 1.0 | 39 (0.6) | 1.0 | 63 (0.8%) | 1.0 |
| Model 2 | ||||||||||
| Occupational position | ||||||||||
| Unskilled, semiskilled positions | 159 (0.9) | 2.44 (1.43 to 4.16) | 53 (0.4) | 2.93 (1.86 to 4.63) | 11 (0.06%) | 3.41 (1.14 to 10.21) | 47 (0.8) | 3.59 (1.35 to 9.56) | 48 (0.3%) | 1.72 (1.18 to 2.52) |
| Skilled manual | 105 (0.8) | 0.73 (0.41 to 1.28) | 36 (0.2) | 1.62 (1.00 to 2.63) | 5 (0.04%) | 1.30 (0.38 to 4.44) | 29 (0.2) | 0.43 (0.17 to 1.15) | 35 (0.2%) | 0.94 (0.62 to 1.42) |
| Non‐manual, intermediate position, professional | 65 (1.1) | 1.0 | 18 (0.1) | 1.0 | 3 (0.05%) | 1.0 | 19 (0.2%) | 1.0 | 25 (0.4%) | 1.0 |
| Social mobility (ref. No mobility) | 1.00 | – | – | 1.0 | – | |||||
| Upward | 5 (0.3) | 0.80 (0.33 to 1.96) | – | – | 3 (0.2) | 1.67 (0.41 to 6.77) | – | |||
| Downward | 12 (0.8) | 2.39 (1.28 to 4.48) | – | – | 8 (0.6) | 7.16 (2.54 to 20.20) | – | |||
| Model 3 | ||||||||||
| Income | ||||||||||
| Lower two quintiles | 34 (0.7) | 3.46 (2.37 to 5.06) | 12 (0.2) | 4.36 (2.39 to 7.97) | 2 (0.03%) | 3.68 (0.78 to 17.35) | 8 (0.2) | 1.21 (0.28 to 5.25) | 12 (0.3%) | 3.65 (1.97 to 6.77) |
| Medium quintile | 60 (0.8) | 1.91 (1.44 to 2.55) | 24 (0.3) | 2.44 (1.55 to 3.82) | 6 (0.08%) | 3.68 (1.35 to 10.03) | 12 (0.2) | 1.31 (0.49 to 3.52) | 18 (0.3%) | 1.59 (0.96 to 2.62) |
| Upper two quintiles | 235 (0.9) | 1.0 | 71 (0.3) | 1.0 | 11 (0.04%) | 1.0 | 75 (0.3) | 1.0 | 78 (0.3%) | 1.0 |
| Social mobility (ref. No mobility) | – | – | – | 1.0 | – | |||||
| Upward | – | – | – | 3 (0.2) | 1.15 (0.34 to 33.93) | – | ||||
| Downward | – | – | – | 8 (0.6) | 3.59 (1.56 to 8.26) | – | ||||
–, not calculable due to low numbers; ICD, International Classification of Diseases.
*Employed only, aged 25–65 years.
†Main effects of education and training, occupational position and income.