Vishal Sheth, Smruti Vaishnav, Shilpa Sapre, Rumi Bhattacharjee, Nitin Raithatha, Manisha Asrani
Changing Trends of Obstetric Hysterectomy Over Last 2 Decades: A Retrospective Analysis from a Single Center Tertiary Care Rural Teaching Hospital of Western India
Journal of obstetrics and gynaecology of India
steadily increasing abundance longitudinal neuroimaging studies large sample sizes multiple repeated measures questions arise regarding appropriate modeling variance covariance current study examined influence standard classes variancecovariance structures linear mixed effects lme modeling fmri data patients pediatric mild traumatic brain injury pmtbi n 181 healthy controls n 162 two visits participants performed cognitive control fmri paradigm compared congruent incongruent stimuli hemodynamic response function parsed peak late peak phases data analyzed 4way groupvisitcongruencyphase lme using afnis 3dlme compound symmetry cs autoregressive process order 1 ar1 unstructured un variancecovariance matrices voxelwise results dramatically varied within cognitive control network uncs congruency effect broader brain regions csun groupvisit depending variancecovariance matrix selected additional testing indicated model fit estimated standard error superior un matrix likely result modeling individual terms summary current findings suggest interpretation results complex designs highly dependent selection variancecovariance structure using lme modeling