楼主: mileo
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[问答] 请问bootstrap以后surveylogistic怎样得到合理的置信区间? [推广有奖]

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楼主
mileo 发表于 2013-10-8 12:19:26 |AI写论文

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我有一个data,用了boostrap以后得到的参数是合理的,但是置信区间范围太窄了,不知道怎么处理?

sasfile g load;
proc surveyselect data=g out=gg
seed=123456 rep=1000 method=urs samprate=1 outhits;
run;
sasfile g close;

proc surveylogistic data=gg ;
model  y(descending) = exposure;
run;

得到的exposure的估计值是合理的(OR=1.2),但是它的置信区间是(1.2-1.2),因为样本量相当于扩大了1000倍,所以置信区间范围很小很小。。。
由于我用的是URS的method来resampling,所以没有weighting,那么怎样才能得到exposure合理的置信区间呢?(包括ROC的c statistics的置信区间?)
谢谢赐教!!不胜感激!!!
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关键词:Bootstrap logistic Bootstra ogistic logisti 置信区间 method close

沙发
mileo 发表于 2013-10-9 07:37:00
求助!!anyone can help? exposure和c statistics的置信区间怎样才能弄出来呢?
Thanks in advance!!!

藤椅
邓贵大 发表于 2013-10-9 11:39:12
Run surveylogistic by replicate, then you'll get 1000 odds ratios. Use the  appropriate percentiles for confidence interval
Be still, my soul: the hour is hastening on
When we shall be forever with the Lord.
When disappointment, grief and fear are gone,
Sorrow forgot, love's purest joys restored.

板凳
mileo 发表于 2013-10-9 21:24:06
邓贵大 发表于 2013-10-9 11:39
Run surveylogistic by replicate, then you'll get 1000 odds ratios. Use the  appropriate percentiles  ...
Thanks!

I tried in this way:

ods output parameterestimates=bout;
proc surveylogistic data=gg ;
model  y(descending) = exposure;
by replicate;
run;
ods output close;
Then I sorted the dataset 'bout' and got the confidence interval of exposure. However, unfortunately no c-statistics (AUC) were included in the dataset 'bout'! I could not get the confidence interval of c-statistics....

Can you help give me some suggestions? Really appreciate your help and patience!!

报纸
邓贵大 发表于 2013-10-9 22:09:15
Be still, my soul: the hour is hastening on
When we shall be forever with the Lord.
When disappointment, grief and fear are gone,
Sorrow forgot, love's purest joys restored.

地板
煮酒半杯 发表于 2015-1-16 10:14:50
邓贵大 发表于 2013-10-9 22:09
http://support.sas.com/documentation/cdl/en/statug/63033/HTML/default/viewer.htm#statug_surveylogist ...
收藏着

7
微微一笑123 发表于 2018-6-30 10:09:52
置信区间窄是不是说明你这个统计量很稳定?重复了1000次都是1.2

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