.
http://www.bepress.com/ijb/vol4/iss1/16/
is the reference I was thinking of.
-Dave
On Apr 17, 2009, at 1:56 PM, Ploutz-Snyder, Robert (JSC-SK)[USRA] wrote:
Statalisters;
In response to a reviewer's suggestion, I'm creating some Bland
Altman plots (using concord.ado) on a panel dataset, where two
parallel observations are made on subjects repeatedly over different
speeds at a task. I'm doing this for a few outcomes, but have shown
a sample below from the first 2 subjects:
+---------------------------------------+
| subject speed rer0 rer1 |
|---------------------------------------|
1. | 1 0 .9453608 .8185958 |
2. | 1 2 .7703036 .7761767 |
3. | 1 3 .7817145 .8262445 |
4. | 1 4 .8781749 .8886828 |
5. | 1 5 .9401777 1.012666 |
6. | 1 6 .9988574 1.080287 |
|---------------------------------------|
7. | 2 0 .9489434 .8451807 |
8. | 2 2 .8366485 .7932663 |
9. | 2 3 .8556526 .8569991 |
10. | 2 4 .8677133 .8986406 |
11. | 2 5 .946165 .9572051 |
12. | 2 6 .9317179 .9195401 |
|---------------------------------------|
I don't normally use BA plots, but for now I'm trying to appease a
pesky reviewer. My question is targeted to those of you who use or
have an interested in the BA plots... Since my data are clustered
on subject, what's the best approach to plot BA-like associations
between means and diffs on the two outcomes? I'm trying to limit the
number of BA plots, as the paper already has better plots showing
the effects of speed (and other vars) on these two repeated
observations. But I have a reviewer who's really stuck on the BA plot.
I'm starting with:
concord rer0 rer1, loa(regline noref)
But troubled by the clustering of observations within subject.
Ideas?
Rob
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