\newcommand{\radio}[1]{%
  \ifnum#1>0{\sicon{radio_checked}}\else{\sicon{radio_unchecked}}\fi
  \ifnum#1>1{\sicon{radio_checked}}\else{\sicon{radio_unchecked}}\fi
  \ifnum#1>2{\sicon{radio_checked}}\else{\sicon{radio_unchecked}}\fi
  \ifnum#1>3{\sicon{radio_checked}}\else{\sicon{radio_unchecked}}\fi
  \ifnum#1>4{\sicon{radio_checked}}\else{\sicon{radio_unchecked}}\fi
}