Table 1.
Three Distributions Producing Identical Bland-Altman Plots
| (1) | (2) | (3) | ||
|---|---|---|---|---|
| County vs. Self-report | Actual | Most | Least | |
| average | difference | HTH | Agreement | Agreement |
| 0 | 0 | 41 | 64 | 1 |
| 0.5 | −1.0 | 8 | 1 | 1 |
| 0.5 | 1.0 | 14 | 1 | 1 |
| 1.0 | −2.0 | 2 | 1 | 1 |
| 1.0 | 0 | 1 | 1 | 1 |
| 1.0 | 2.0 | 2 | 1 | 1 |
| 1.5 | 3.0 | 1 | 1 | 1 |
| 2.0 | −4.0 | 2 | 1 | 1 |
| 2.5 | −5.0 | 1 | 1 | 1 |
| 2.5 | 1.0 | 1 | 1 | 1 |
| 3.0 | −6.0 | 1 | 1 | 64 |
| Exact agreement: | 55.4% | 87.8% | 2.7% | |
Notes: The average and difference columns show the actual range of values among HTH enrollees interviewed in English about hospital use. Column (1) shows the true distribution of values in the HTH study. Columns (2) and (3) are distributions that produce the most and least agreement, respectively, while maintaining the same Bland-Altman plot; other distributions are possible that would produce similar levels of agreement to those in (2) and (3).