| age | age |
| sex | gender |
| trtgiven | treatment: RT=radition, CMT=Chemotherapy and radiation |
| medwidsi | mediastinum involvement: N=no, S=small, L=Large |
| extranod | extranodal disease: Y=extranodal disease, N=nodal disease |
| clinstg | clinical stage: 1=stage I, 2=stage II |
| time | first failure time |
| status | censoring status: 0=censored, 1=relapse, 2=death |