Logistic regression of relationship between breathlessness (graded on the mMRC scale: 0=none, 1=mild, 2=moderate, 3=severe) and poor self-rated work performance, stratified by sex. Stratum-specific OR for occupational group are also presented
| Men | Women | |||||
| OR | 95% CI | p | OR | 95% CI | p | |
| Unadjusted | ||||||
| mMRC 0 | 1.0 | 1.0 | ||||
| mMRC 1 | 4.1 | 2.9 to 5.9 | <0.01 | 2.3 | 1.5 to 3.6 | <0.01 |
| mMRC 2 | 7.8 | 4.6 to 13.3 | 6.0 | 3.6 to 9.7 | ||
| mMRC 3 | 13.6 | 7.8 to 23.5 | 8.5 | 4.8 to 15.3 | ||
| Adjusted | ||||||
| mMRC 0 | 1.0 | 1.0 | ||||
| mMRC 1 | 4.1 | 2.7 to 6.1 | <0.01 | 2.0 | 1.3 to 3.2 | <0.01 |
| mMRC 2 | 7.5 | 4.1 to 13.6 | 4.9 | 2.8 to 8.4 | ||
| mMRC 3 | 8.5 | 4.5 to 15.9 | 7.1 | 3.7 to 13.9 | ||
| Age | ||||||
| Employment | 1.1 | 1.0 to 1.1 | 0.08 | 1.0 | 0.9 to 1.1 | 0.96 |
| full time | 1.0 | 1.0 | ||||
| part time | 1.5 | 0.9 to 2.5 | 0.13 | 1.1 | 0.81 to 1.7 | 0.50 |
| General control (low) | 1.6 | 1.1 to 2.3 | 0.02 | 1.1 | 0.7 to 1.7 | 0.58 |
| Optimism (low) | 1.5 | 1.1 to 2.2 | 0.02 | 1.5 | 1.0 to 2.3 | 0.03 |
| Coping ability (low) | 1.6 | 1.1 to 2.3 | 0.02 | 2.2 | 1.5 to 3.3 | <0.01 |
| Work control (low) | 3.2 | 2.3 to 4.6 | <0.01 | 3.1 | 2.0 to 4.6 | <0.01 |
| Physical strenuousness (job) | ||||||
| Low | 1.0 | 1.0 | ||||
| Average | 2.4 | 1.5 to 3.7 | 2.1 | 1.3 to 3.4 | ||
| High | 2.8 | 1.8 to 4.5 | < 0.01 | 2.5 | 1.4 to 4.2 | <0.01 |
| Major occupational group (UK SOC 2000) | ||||||
| 1–3 | 1.0 | 1.0 | ||||
| 4–5 | 1.1 | 0.7 to 1.7 | 0.78 | 0.6 | 0.3 to 1.0 | 0.08 |
| 6–9 | 1.0 | 0.6 to 1.5 | 0.9 | 0.6 to 1.4 | ||
| Stratum-specific odds rations for occupational group | ||||||
| Group 1–3 | ||||||
| mMRC 0 | 1.0 | 1.0 | ||||
| mMRC 1 | 5.4 | 2.6 to 11.0 | < 0.01 | 3.4 | 1.6 to 7.5 | <0.01 |
| mMRC 2 | 12.7 | 4.9 to 32.7 | 11.5 | 4.5 to 29.6 | ||
| mMRC 3 | 39.6 | 11.2 to 140.6 | 17.6 | 5.1 to 60.4 | ||
| Group 4–5 | ||||||
| mMRC 0 | 1.0 | 1.0 | ||||
| mMRC 1 | 4.0 | 2.0 to 7.7 | <0.01 | 1.69 | 0.6 to 4.6 | |
| mMRC 2 | 7.4 | 2.5 to 21.8 | 1.27 | 0.3 to 6.4 | ||
| mMRC 3 | 2.6 | 0.8 to 9.2 | * | |||
| Group 6–9 | ||||||
| mMRC 0 | 1.0 | 1.0 | ||||
| mMRC 1 | 3.3 | 1.6 to 7.0 | <0.01 | 1.5 | 0.8 to 3.0 | <0.01 |
| mMRC 2 | 4.9 | 1.4 to 16.6 | 4.5 | 2.0 to 10.3 | ||
| mMRC 3 | 9.7 | 3.6 to 26.1 | 7.8 | 3.3 to 18.3 | ||
↵* mMRC 3 predicted failure perfectly and therefore is not presented UK SOC 2000 = Standard Occupational Classification.