QOL was assessed with : ( 1 ) a visual analogue scale ( VAS ) for self-assessment of overall current health ; ( 2 ) the Short-Form 12-Item Version 2 Health Survey ( ) ( SF-12V2 ) , for which responses are summarized into eight individual QOL domains plus component summary scores for physical health [ the Physical Health Component Summary ( PCS ) ] and mental health [ the Mental Health Component Summary ( MCS ) ] .