Mixed models with repeated meassures

2056

收藏 2014-05-02

Hi everyone

I eish someone can help me with this one

I have a sample of patients who went through bariatric surgery and their
weight at time 1,2,3,4 but with lots of missing data

so I opted for mixed model with repeated meassures using the following
syntax

DATASET ACTIVATE DataSet1.
MIXED peso BY time
  /CRITERIA=CIN(95) MXITER(100) MXSTEP(10) SCORING(1)
SINGULAR(0.000000000001) HCONVERGE(0,
ABSOLUTE) LCONVERGE(0, ABSOLUTE) PCONVERGE(0.000001, ABSOLUTE)
  /FIXED=time | SSTYPE(3)
  /METHOD=REML
  /PRINT=SOLUTION.

and then

MIXED peso BY time
  /CRITERIA=CIN(95) MXITER(100) MXSTEP(10) SCORING(1)
SINGULAR(0.000000000001) HCONVERGE(0,
ABSOLUTE) LCONVERGE(0, ABSOLUTE) PCONVERGE(0.000001, ABSOLUTE)
  /FIXED=time | SSTYPE(3)
  /METHOD=REML
  /PRINT=R SOLUTION TESTCOV
  /REPEATED=time | SUBJECT(code) COVTYPE(UN).

I wanted to confirm if it is the correct syntax and then ask how can I
aseses the variable of number of nutrition appointments if I want to know if
this is a significant predictor of weight loss.

Just on a linear regression of time 4 by time 1 and number of appointments?
or any suggestions

thanks

Karen

扫码加我拉你入群

请注明：姓名-公司-职位

以便审核进群资格，未注明则拒绝

全部回复

ReneeBK

2014-5-2 10:05:18

I don't have a lot of time to study your situation carefully right now, but from a quick glance, I think you might want to consider exploring covariance structures other than UN. The material at the following links may be helpful.

I haven't viewed all of the last one. He does not exit the dialogs via PASTE, but he does appear to explore using various covariance structures.

Bruce Weaver

扫码加我拉你入群

请注明：姓名-公司-职位

以便审核进群资格，未注明则拒绝

ReneeBK

2014-5-2 10:07:38

https://mail.google.com/mail/ca/#search/mixed+models/144dfb453b90de22?projector=1

扫码加我拉你入群

请注明：姓名-公司-职位

以便审核进群资格，未注明则拒绝

扫码加我 拉你入群

扫码加我 拉你入群

扫码加我 拉你入群

分享

扫码加好友，拉您进群

扫码加我拉你入群

扫码加我拉你入群

扫码加我拉你入群