Table 3 Logistic regressions on consent to health data linkage: Marginal effects
| Â | NCDS | Â | BHPS | Â | UKHLS | Â |
|---|---|---|---|---|---|---|
| Â | M.E. | S.E. | M.E. | S.E. | M.E. | S.E. |
England | 0.00 | 0.01 | 0.06 | 0.04 | -0.02 | 0.01 |
London/SE | -0.02* | 0.01 | 0.03 | 0.03 | -0.02* | 0.01 |
Male | -0.00 | 0.01 | 0.03* | 0.01 | 0.02*** | 0.00 |
British/Irish White | 0.05* | 0.02 | 0.18*** | 0.03 | 0.09*** | 0.01 |
Aged 50-52 | Â | Â | 0.02 | 0.03 | 0.02 | 0.01 |
Number of own children in the household (ref: none) | Â | Â | Â | Â | Â | Â |
  1 | -0.02 | 0.01 | 0.00 | 0.03 | 0.02* | 0.01 |
  2 | -0.01 | 0.01 | -0.01 | 0.03 | 0.01 | 0.01 |
  3 or more | -0.02 | 0.02 | 0.07 | 0.04 | 0.01 | 0.01 |
Lives alone | 0.03 | 0.02 | 0.04 | 0.02 | -0.02** | 0.01 |
Highest degree (ref: higher degree) | Â | Â | Â | Â | Â | Â |
  First degree | -0.02 | 0.03 | -0.08 | 0.05 | 0.01 | 0.01 |
  Diploma | -0.03 | 0.03 | -0.12** | 0.05 | 0.03* | 0.01 |
  A-level | -0.03 | 0.03 | -0.08 | 0.05 | 0.03** | 0.01 |
  Other qualification | -0.02 | 0.02 | -0.10* | 0.05 | 0.03** | 0.01 |
  No educational qualification | -0.05 | 0.03 | -0.14** | 0.05 | -0.00 | 0.01 |
Unemployed | 0.03 | 0.03 | 0.02 | 0.05 | 0.02 | 0.01 |
Socio-economic status (ref = managerial/professional) |  |  |  |  |  |  |
  Intermediate | -0.01 | 0.02 | -0.01 | 0.03 | -0.01 | 0.01 |
  Employers | 0.06** | 0.02 | -0.11* | 0.05 | -0.02 | 0.02 |
  Supervisory | 0.02 | 0.02 | 0.02 | 0.04 | 0.02 | 0.01 |
  Routine | 0.02 | 0.01 | 0.00 | 0.03 | 0.02* | 0.01 |
  Other status | 0.03 | 0.02 | -0.03 | 0.04 | -0.02 | 0.01 |
Monthly gross earnings (ref: bottom quartile) | Â | Â | Â | Â | Â | Â |
  2nd quartile | 0.03* | 0.01 | -0.02 | 0.02 | 0.00 | 0.01 |
  3rd quartile | 0.11*** | 0.01 | -0.01 | 0.05 | -0.03* | 0.01 |
  4th quartile | 0.11*** | 0.01 | -0.04 | 0.05 | -0.03* | 0.01 |
Subjective health (ref: excellent) | Â | Â | Â | Â | Â | Â |
  Good | 0.00 | 0.01 | -0.03 | 0.02 | 0.00 | 0.01 |
  Fair | -0.04*** | 0.01 | -0.07** | 0.03 | -0.00 | 0.01 |
  Poor | 0.01 | 0.02 | -0.04 | 0.04 | -0.01 | 0.01 |
  Very poor | 0.02 | 0.03 | 0.01 | 0.06 | -0.00 | 0.01 |
Body mass index (ref: bottom quartile) | Â | Â | Â | Â | Â | Â |
  2nd quartile | 0.09* | 0.04 | -0.05 | 0.05 | 0.01 | 0.02 |
  3rd quartile | 0.09* | 0.04 | -0.04 | 0.05 | 0.00 | 0.02 |
  4th quartile | 0.12** | 0.04 | 0.02 | 0.05 | 0.02 | 0.02 |
Health limits daily activities | -0.00 | 0.02 | 0.00 | 0.03 | 0.01 | 0.01 |
Suffering from an illness | 0.03 | 0.02 | 0.05 | 0.04 | 0.02** | 0.01 |
Reported health problem | Â | Â | Â | Â | Â | Â |
  Diabetes | -0.03 | 0.02 | 0.05 | 0.03 | 0.01 | 0.01 |
  Relating to stomach problems | 0.03* | 0.02 | 0.02 | 0.03 | -0.01 | 0.01 |
  Cancer | 0.02 | 0.05 | 0.10 | 0.06 | -0.02 | 0.02 |
  Epilepsy | -0.02 | 0.05 | -0.01 | 0.08 | 0.01 | 0.03 |
  Relating to chest problems | 0.03 | 0.01 | 0.00 | 0.02 | 0.00 | 0.01 |
  Other health problem | -0.00 | 0.02 | -0.01 | 0.03 | -0.00 | 0.01 |