Organisations sampled, sampling strategies, response rates, and inclusion rates
| Organisation Type | Sampling approach | Partial sets of documents received | Complete sets of documents received | Number reviewed |
|---|---|---|---|---|
| *Physician professional associations that require adherence to the Code of Medical Ethics or Principles of Medical Ethics of the American Medical Association (AMA), but which have no other ethics policies, were not eligible for inclusion. | ||||
| Physician professional associations | All 70 societies with independent ethics policies,* including the AMA | 9 (13%) | 57 (84%) | 18 |
| Physician group practices | 59 groups, selected at random from Medical Group Management Association Directory | 10 (17%) | 19 (32%) | 9 |
| Health plans | 75 plans, selected at random from American Association of Health Plans Directory | 11 (15%) | 12 (16%) | 12 |