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From |
"Ploutz-Snyder, Robert (JSC-SK)[USRA]" <robert.ploutz-snyder-1@nasa.gov> |

To |
"statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |

Subject |
RE: st: Bland Altman Plots for Clustered Data |

Date |
Fri, 17 Apr 2009 16:07:49 -0500 |

Thank you Dave! -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of David Airey Sent: Friday, April 17, 2009 4:04 PM To: statalist@hsphsun2.harvard.edu Subject: Re: st: Bland Altman Plots for Clustered Data . 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 > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Bland Altman Plots for Clustered Data***From:*"Ploutz-Snyder, Robert (JSC-SK)[USRA]" <robert.ploutz-snyder-1@nasa.gov>

**Re: st: Bland Altman Plots for Clustered Data***From:*David Airey <david.airey@vanderbilt.edu>

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