is this eTIV corrected? I would look at some of the outliers and make
sure that the segmentations are accurate. Certainly the trend is in the
correct (and depressing) direction.
cheers
Bruce
On Wed, 22 Nov 2017, 郑凤莲 wrote:
Hi Bruce,
Thanks for your advice. There are a part of the result. Blue color stands
women, and Red color
stands men.
The number of the data is not enough large. Are they ok? May I use them in
my paper?
[IMAGE][IMAGE][IMAGE]
Thanks a lot !
Zheng
At 2017-11-20 10:15:49, "Bruce Fischl" <[email protected]> wrote:
>Hi Zheng
>
>I would scatter plot age vs. volume, coloring men and women differently
>(or different symbols) with and without eTIV correction to get an idea of
>what is going on
>
>cheers
>Bruce
>
>
>On Mon, 20 Nov
>2017, 郑凤莲 wrote:
>
>> Hi Bruce,
>>
>> My data is loss from 35 to 40. But the uniform of sex is not well from 40
to 55 and from 56 to
>> 71. I did the correlation analysis between age and volume. I don't know how
I can explain this
>> problem.
>> Thanks again.
>>
>> Sincerely,
>> Zheng
>>
>>
>>
>>
>>
>> At 2017-11-20 09:35:45, "Bruce Fischl" <[email protected]> wrote:
>> >Hi Zheng
>> >
>> >how uniform is your distribution? I'm hardly an expert on this, but I
>> >wouldn't expect very large effects until you get into the older end of
>> >that range. Have you scatter plotted your data?
>> >Bruce
>> >On Mon, 20 Nov 2017, 郑凤莲
>> >wrote:
>> >
>> >>
>> >> Hi Bruce,
>> >>
>> >> Thank you for your help.
>> >> I have 54 subjects, aged from 21 to 71 and only one group. I want to
compare the change o
f
>> >> hippocampus volume with age. The results before and after doing the
correction for eTIV are th
e
>> >> same. Where is wrong? Or if there is no error, how can I explain it in
discussion?
>> >>
>> >> Thanks,
>> >> Zheng
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> At 2017-11-20 04:55:49, "Bruce Fischl" <[email protected]> wrote:
>> >> >Hi Zheng
>> >> >
>> >> >yes, I see. Maybe the effect is smaller than you have the power to see, or
>> >> >there is no effect? You would need to give us more details for us to help.
>> >> >Are you correcting for eTIV? What measure are you comparing?
>> >> >
>> >> >cheers
>> >> >Bruce
>> >> > On Sun, 19 Nov 2017, 郑凤莲 wrote:
>> >> >
>> >> >> Hi Bruce,
>> >> >>
>> >> >> I am sorry for this situation.
>> >> >> In the first way, there was an statistical difference in left
hippocampus, but no diff
ere
>> nce
>> >> in
>> >> >> right hippocampus. In the second way, there was both no statistical
difference in left or
>> >> >> right hippocampus. I don't know what causes this result.
>> >> >> Can you understand me this time?
>> >> >>
>> >> >> Thanks,
>> >> >> Zheng
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >> At 2017-11-18 22:58:56, "Bruce Fischl" <[email protected]> wrote:
>> >> >> >Hi Zheng
>> >> >> >
>> >> >> >no difference between what and what?
>> >> >> >
>> >> >> >cheers
>> >> >> >Bruce
>> >> >> >On Fri, 17 Nov 2017, 郑凤莲 wrote:
>> >> >> >
>> >> >> >> Hi professor,
>> >> >> >>
>> >> >> >> I am using Freesurfer for DTI data. When I run 'mri_segstats', I
>> >> >> >> got the result that there w
>> >> >> as
>> >> >> >> an obvious difference in left hippocampus, but no difference in
right hippocampus. Then,
I
>> run
>> >> >> >> segmentation of hippocampus subfields. The result showed there is
no difference in total
le
>> ft
>> >> or
>> >> >> >> right hippocampus, and only in two right hippocampus subfields has
significant differenc
e.
>> Why
>> >> is
>> >> >> >> there inconsistent result in two means?
>> >> >> >> Thank you very much.
>> >> >> >>
>> >> >> >> Sincerely,
>> >> >> >> Zheng
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>>
>>
>>
>>
>>
>>
>>
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