Vengono qui riportati i test statistici utilizzati nello studio.Confronto pre-post operatorio nei diversi trattamenti.Voltd pre e post test utilizzato T_TEST per dati appaiati trasformazione SQRT bysort eziologia trattamento: ttest sqrt_voltd2= sqrt_voltd -----------------------------------------------------------------------------------------------------------> ---------------------------------------------------------------------------- ---------+------------------------------------------------------------------- 14.64898 ---------+-------------------------------------------------------------------diff | 18 -1.332164 .3431673 1.455936 -2.056184 -.6081447 ------------------------------------------------------------------------------Ho: mean(sqrt_voltd2 -sqrt_voltd) = mean(diff) = 0 Ha: mean(diff) < 0 Ha: mean(diff) != 0 Ha: mean(diff) > 0 t = -3.8820 t = -3.8820 t = -3.8820 P < t = 0.0006 P > |t| = 0.0012 P > t = 0.9994 -----------------------------------------------------------------------------------------------------------> eziologia = Ischemica, trattamento = SOVERING  --------+------------------------------------------------------------------- ----------------------------------------------------------------------Ho: mean(sqrt_voltd2 -sqrt_voltd) = mean(diff) = 0 Ha: mean(diff) < 0 Ha: mean(diff) != 0 Ha: mean(diff) > 0 t = -4.3452 t = -4.3452 t = -4.3452 P < t = 0.0113 P > |t| = 0.0225  ---------+------------------------------------------------------------------- ---------+------------------------------------------------------------------- ----------------------------------------------------------------------------- Pag 131 --------+------------------------------------------------------------------- ---------+------------------------------------------------------------------- ------------------------------------------------------------------------------ Ha: mean(diff) < 0 Ha: mean(diff) != 0 Ha: mean(diff) > 0 t = -3.4931 t = -3.4931 t = -3.4931 P < t = 0.0009 P > |t| = 0.0019 --------+------------------------------------------------------------------- ---------+------------------------------------------------------------------- ----------------------------------------------------------------------------- Pag 132 --------+------------------------------------------------------------------- ---------+------------------------------------------------------------------- ----------------------------------------------------------------------------- . bysort eziologia trattamento:ttest log_ef2= log_ef  ---------+------------------------------------------------------------------- ---------+------------------------------------------------------------------- -----------------------------------------------------------------------------Ho: mean(log_ef2 -log_ef) = mean(diff) = 0 Ha: mean(diff) < 0 Ha: mean(diff) != 0 Ha: mean(diff) > 0 t = -0.1202 t = -0.1202 t = -0.1202 P < t = 0.4528 P > |t| = 0.9056 --------+------------------------------------------------------------------- ---------+------------------------------------------------------------------- ---------------------------------------------------------------------------- ---------+------------------------------------------------------------------- ---------+------------------------------------------------------------------- ---------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------- --------+------------------------------------------------------------------- --------+------------------------------------------------------------------- ---------------------------------------------------------------------------- ------------+----------------------------- -------------+----------------------------- ------------+--------------------------------------------------------------- ----------------------------------------------------------------------------- ------------+----------------------------- ------------+----------------------------- ------------+--------------------------------------------------------------- ----------------------------------------------------------------------------- ------------+----------------------------- -------------+--------------------------------------------------------------- ---------------------------------------------------------------------------- ------------+----------------------------- -------------+----------------------------- ------------+--------------------------------------------------------------- ------------+----------------------------- ------------+----------------------------- ----------------------------------------------------------------------------  2.505641 --------------------------------------------------------------------------