I'm running a 3dLME analysis and i'm trying to figure out the correct model specification for taking covariates out of account.

With age and sex as covariates, would
Duration*Sex*Age or
Duration+Sex+Age
properly exclude sex and age from any GLT results?

This is the current model I have for the analysis.

3dLME -prefix LME_output \
-mask /data/ALS_LME/TPM_resam.nii \
-jobs 1 \
-model 'Duration+Sex+Age' \
-qVars 'Age,Duration,RFRS,FVC' \
-qVarCenters '0,0,0,0' \
-ranEff '~1' \
-SS_type 3 \
-num_glt 4 \
-gltLabel 1 'longitudinal' -gltCode 1 'Duration :' \
-gltLabel 2 'M-F' -gltCode 2 'Sex : 1*M -1*F' \
-gltLabel 3 'F-M' -gltCode 3 'Sex : 1*F -1*M' \
-gltLabel 4 'age' -gltCode 4 'Age :' \
-dataTable \
Subj Timepoint Sex Age Duration RFRS FVC InputFile \
AA 1 F 61 4.2 40 0.60 /data/ALS_Study_organized/ALS_00/A_AA_2005-09-22/s_norm_DTI_FA.nii \
FH 1 M 75 2.9 30 0.64 /data/ALS_Study_organized/ALS_00/A_FH_2006-01-26_A/s_norm_DTI_FA.nii \
FJ 1 M 42 1.7 32 0.83 /data/ALS_Study_organized/ALS_00/A_FJ_2006-03-23/s_norm_DTI_FA.nii \
KL 1 F 56 1.3 43 0.41 /data/ALS_Study_organized/ALS_00/A_KL_2005-11-03/s_norm_DTI_FA.nii \
MD 1 M 56 3.9 37 0.77 /data/ALS_Study_organized/ALS_00/A_MD_2006-03-15/s_norm_DTI_FA.nii \
VN 1 F 55 3.4 35 0.99 /data/ALS_Study_organized/ALS_00/A_VN_2006-02-16/s_norm_DTI_FA.nii \
WJ 1 F 44 1.6 43 1.08 /data/ALS_Study_organized/ALS_00/A_WJ_2005-09-15/s_norm_DTI_FA.nii \
CR 2 M 66 3.2 37 1.04 /data/ALS_Study_organized/ALS_06/A_CR_2006-04-10/s_norm_DTI_FA.nii \
DL 2 M 69 6.8 27 0.87 /data/ALS_Study_organized/ALS_06/A_DL_2005-10-13/s_norm_DTI_FA.nii \
FH 2 M 75 3.4 27 0.65 /data/ALS_Study_organized/ALS_06/A_FH_2006-08-10/s_norm_DTI_FA.nii \
FJ 2 M 43 2.2 28 0.69 /data/ALS_Study_organized/ALS_06/A_FJ_2006-09-28/s_norm_DTI_FA.nii \
HL 2 M 63 3.9 24 0.49 /data/ALS_Study_organized/ALS_06/A_HL_2005-11-10/s_norm_DTI_FA.nii \
LJ 2 M 44 2.5 13 0.39 /data/ALS_Study_organized/ALS_06/A_LJ_2005-10-26/s_norm_DTI_FA.nii \
MD 2 M 57 4.4 34 0.78 /data/ALS_Study_organized/ALS_06/A_MD_2006-09-06/s_norm_DTI_FA.nii \
WJ 2 F 45 2.1 39 1.09 /data/ALS_Study_organized/ALS_06/A_WJ_2006-02-23/s_norm_DTI_FA.nii \
CR 3 M 67 3.5 35 1.02 /data/ALS_Study_organized/ALS_12/A_CR_2006-08-16/s_norm_DTI_FA.nii \
FJ 3 M 43 2.7 20 0.53 /data/ALS_Study_organized/ALS_12/A_FJ_2007-03-22/s_norm_DTI_FA.nii \
HL 3 M 63 4.6 22 0.46 /data/ALS_Study_organized/ALS_12/A_HL_2006-08-17/s_norm_DTI_FA.nii \
MD 3 M 57 4.8 33 0.72 /data/ALS_Study_organized/ALS_12/A_MD_2007-03-07/s_norm_DTI_FA.nii \
VN 3 F 56 4.4 23 0.40 /data/ALS_Study_organized/ALS_12/A_VN_2007-03-01/s_norm_DTI_FA.nii \
WJ 3 F 45 2.6 36 1.01 /data/ALS_Study_organized/ALS_12/A_WJ_2006-08-31/s_norm_DTI_FA.nii \
CR 4 M 67 4.1 33 0.88 /data/ALS_Study_organized/ALS_18/A_CR_2007-02-21/s_norm_DTI_FA.nii \
MD 4 M 58 5.4 32 0.73 /data/ALS_Study_organized/ALS_18/A_MD_2007-09-19/s_norm_DTI_FA.nii \
WJ 4 F 45 3.0 40 1.04 /data/ALS_Study_organized/ALS_18/A_WJ_2007-01-18/s_norm_DTI_FA.nii