Table 2.
Overview of results from the regression model
| Parameter estimate | Standard error | |
|---|---|---|
| Intercept | 0.976 | 0.006 |
| Age last birthday | −0.001 | 0.000 |
| Female | −0.005 | 0.003 |
| Diabetes | −0.029 | 0.001 |
| Obese – BMI > 30 | −0.027 | 0.003 |
| Equalized income (as opposed to lowest quintile) | ||
| Equalized income – missing | 0.031 | 0.005 |
| Equalized income – 2nd quintile | 0.027 | 0.005 |
| Equalized income – 3rd quintile | 0.040 | 0.005 |
| Equalized income – 4th quintile | 0.056 | 0.005 |
| Equalized income – top quintile | 0.064 | 0.005 |
| Smoking (as opposed to non-smoking) | ||
| Smoking: ex-regular smoker | 0.026 | 0.004 |
| Smoking: never smoker | 0.025 | 0.003 |
| Acute illness (as opposed to not having had acute illness in the last 2 weeks) | ||
| Acute illness: 1–3 days | −0.039 | 0.007 |
| Acute illness: 4–6 days | −0.077 | 0.009 |
| Acute illness: 7–13 days | −0.088 | 0.008 |
| Acute illness: a full 2 weeks | −0.153 | 0.007 |
| GHQ (as opposed to having a score of zero) | ||
| GHQ: score 1–3 | −0.058 | 0.003 |
| GHQ: score 4+ | −0.194 | 0.005 |
| Comorbidities | ||
| Kidneys | −0.063 | 0.016 |
| Rheumatism | −0.169 | 0.005 |
| Asthma | −0.013 | 0.006 |
| Back problems | −0.137 | 0.006 |
| Bronchitis | −0.130 | 0.015 |
| Cancer | −0.073 | 0.011 |
| Epilepsy | −0.080 | 0.016 |
| Hearing problems | 0.028 | 0.012 |
| Ulcer | −0.059 | 0.011 |
| CVD (angina, heart attack or stroke) | −0.048 | 0.006 |
| High blood pressure | −0.017 | 0.004 |
Notes: Values in bold are statistically insignificant (ie, all values were significant [P < 0.05] except those for female gender).
Abbreviations: BMI, body mass index; CVD, cardiovascular disease; GHQ, General Health Questionnaire.