The severity of side effects experienced by patients while being treated with a particular medicine is under study. The severity is measured on the scale: none, mild, moderate, severe, very severe. The variable of interest is

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Die felheid van die newe-effekte deur pasiënte ervaar terwyl onder behandeling met ‘n spesifieke medikasie word ondersoek. Die felheid word gemeet op die skaal: geen, lig, matig, hewig, uiters hewig. Die veranderlike van belang is