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Hello
I am conducting the latent class growth mixture model for my study
.This study uses data from the longitudinal cohort. Data includes 4 different phases.Phase 1 has a span of (2003-2006) and is following at 3 subsequent phases.we aimed to identify different patterns of BMI I WANTto describe the shape of the longitudinal trajectory of BMI
WARNING: THE RESIDUAL COVARIANCE MATRIX (THETA) IS NOT POSITIVE DEFINITE.
THIS COULD INDICATE A NEGATIVE VARIANCE/RESIDUAL VARIANCE FOR AN OBSERVED
VARIABLE, A CORRELATION GREATER OR EQUAL TO ONE BETWEEN TWO OBSERVED
VARIABLES, OR A LINEAR DEPENDENCY AMONG MORE THAN TWO OBSERVED VARIABLES.
CHECK THE RESULTS SECTION FOR MORE INFORMATION.
PROBLEM INVOLVING VARIABLE BMI3.
WARNING: THE LATENT VARIABLE COVARIANCE MATRIX (PSI) IS NOT POSITIVE
DEFINITE. THIS COULD INDICATE A NEGATIVE VARIANCE/RESIDUAL VARIANCE FOR A
LATENT VARIABLE, A CORRELATION GREATER OR EQUAL TO ONE BETWEEN TWO LATENT
VARIABLES, OR A LINEAR DEPENDENCY AMONG MORE THAN TWO LATENT VARIABLES.
CHECK THE TECH4 OUTPUT FOR MORE INFORMATION.
PROBLEM INVOLVING VARIABLE Q. |
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my sintax
Title: bmi_growth.inp
Basic growth curve
Data: File is "plosemedicine_ONLYmplus.dat" ;
Analysis: Processors = 2;
Variable:
Names are
id age sex enter1 enter2 enter3 bmi_base bmi1 bmi2 bmi3;
Missing are all (-9999) ;
Usevariables are bmi_base bmi1 bmi2 bmi3 ;
Model: i s q| bmi_base@-3 bmi1@-2 bmi2@-1 bmi3@0;
Output:
Sampstat Mod(3.84);
Plot:
Type is Plot3;
Series = bmi_base bmi1 bmi2 bmi3(*); |
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Tank you
send email
please Guidance about included covariate(age)in my syntax. |
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