p********a 发帖数: 5352 | 1 如果需要计算STUDY GROUP和CONTROL GROUP在去年和今年COST的差别,并且ADJUST BY
AGE SEX,有什么好的办法?
有个方法说是每年分别做LINEAR REGRESSION,MODEL COST = AGE GENDER,然后
ADJUSTED COST= UNADJUSTed COST - (系数×AGE+系数 ×SEX),其中系数是LINEAR
REGRESSION的系数,这样对吗?可是这个LINEAR REGRESSION的MODEL R SQUARE只有0.
05,而且几个MODEL ASSUMPTION 都不成立,怎么做ADJUST呢?
请大牛帮忙,奖励100WB |
l*********s 发帖数: 5409 | 2 you may want to start from a full model, with class variable (study/control)
, year (last or this year), age, sex and all binary interactions. Further, age is probably better
discretized as cost/age relationship is unlikely to be linear. |
d**********r 发帖数: 24123 | 3 More like change from baseline.
Use difference between the two years as response and then mixed model |
s*r 发帖数: 2757 | 4 you need the group effect in the model
if you are interested in whether the group effect is significant, the small
r2 does not matter.
if you are interested in estimating means, normal assumption does not matter
.
the cost itself may have a highly skewed distribution, and probably need log
transformation. the change of cost could have a quite symmetric
distribution |
p********a 发帖数: 5352 | 5 是啊。GROUP EFFECT是在MODEL里的,实际MODEL是
COST = AGE GENDER GROUP
不仅仅是看SIGNIFICANT,还需要算ROI啊,所以需要COST PMPM DIFFERENCE.
难道用LOG(COST+1)? |
s*r 发帖数: 2757 | 6 如果你有一堆cost在0上,另外一堆是远大于0的,那这个error distribution就很难说
是什么了.只有算significance的时候 才需要correct error distribution
【在 p********a 的大作中提到】 : 是啊。GROUP EFFECT是在MODEL里的,实际MODEL是 : COST = AGE GENDER GROUP : 不仅仅是看SIGNIFICANT,还需要算ROI啊,所以需要COST PMPM DIFFERENCE. : 难道用LOG(COST+1)?
|
p********a 发帖数: 5352 | 7 Cost是选的TOP1%的,没有0吧。做ADJUSTMENT很头痛啊 |
s*r 发帖数: 2757 | 8 不知道你担心啥,既然明确告诉你用age and gender,那就用吧
把2 way interaction 3 way interaction全放进去不就的了
难道你还要考虑各种spline?
【在 p********a 的大作中提到】 : Cost是选的TOP1%的,没有0吧。做ADJUSTMENT很头痛啊
|
p********a 发帖数: 5352 | 9 唯一担心的就是结果不好:)
结果好,啥方法都没人管
结果不好,人就老怀疑你做的是错的
谢谢楼上各位,马上发包子 |
p********a 发帖数: 5352 | 10 问题还没有解决,请大牛们帮忙!再奖励500WB!急急急
1.一楼的那个方法正确吗?
2.是否需要先做Z-SCORE把OUTLIER去掉呢?
3. 如果有些VARIABLE不SIGNIFICANT,是不是需要去掉它们呢?我的PREDICTOR用了AGE
GENDER GROUP 还有一个CLINICAL INDEX,是病人所有疾病数目的和。
传说中的SONGKUN大侠和OLOOLO大侠哪里去了?还有精算大侠? |
p********a 发帖数: 5352 | 11 对了,如果用PROPENSITY SCORING来选择CONTROL GROUP, BY AGE SEX GENDER
CLINICAL INDEX,是否正确? |
D******n 发帖数: 2836 | 12 cost = age+gender+group+year.
adj-cost difference = year_coef
BY
LINEAR
【在 p********a 的大作中提到】 : 如果需要计算STUDY GROUP和CONTROL GROUP在去年和今年COST的差别,并且ADJUST BY : AGE SEX,有什么好的办法? : 有个方法说是每年分别做LINEAR REGRESSION,MODEL COST = AGE GENDER,然后 : ADJUSTED COST= UNADJUSTed COST - (系数×AGE+系数 ×SEX),其中系数是LINEAR : REGRESSION的系数,这样对吗?可是这个LINEAR REGRESSION的MODEL R SQUARE只有0. : 05,而且几个MODEL ASSUMPTION 都不成立,怎么做ADJUST呢? : 请大牛帮忙,奖励100WB
|
p********a 发帖数: 5352 | |