thoro                  package:Epi                  R Documentation

_T_h_o_r_o_t_r_a_s_t _S_t_u_d_y

_D_e_s_c_r_i_p_t_i_o_n:

     The 'thoro' data frame has 2470 rows and 14 columns. Each row
     represents one patient that have had cerebral angiography (X-ray
     of the brain) with an injected contrast medium, either Thorotrast
     or another one (the controls).

_F_o_r_m_a_t:

     This data frame contains the following columns:

             'id':  Identification of person.
            'sex':  Sex, 1: male / 2: female.
       'birthdat':  Date of birth, 'Date' variable.
       'contrast':  Group, 1: Thorotrast / 2: Control.
       'injecdat':  Date of contrast injection, 'Date' variable.
         'volume':  Injected volume of Thorotrast in ml. Control patients have a 0 in this variable.
        'exitdat':  Date of exit from the study, 'Date' variable.
       'exitstat':  Status at exit, 1: dead / 2: alive, censored at closing of study, 20 February 1992 / 3: censored alive at some earlier date.
          'cause':  Cause of death. See causes in the helpfile for 'gmortDK'
       'liverdat':  Date of liver cancer diagnosis, 'Date' variable.
          'liver':  Indicator of liver cancer diagnosis. Not all livercancers are histologically verified, hence 'liver >= hepcc + chola + hmang'
          'hepcc':  Hepatocellular carcinoma at 'liverdat'.
          'chola':  Cholangiocellular carcinoma at 'liverdat'.
          'hmang':  Haemangisarcoma carcinoma at 'liverdat'.

_S_o_u_r_c_e:

     M Andersson, M Vyberg, J Visfeldt, B Carstensen & HH Storm:
     Primary liver tumours among Danish patients exposed to Thorotrast.
     Radiation Research, 137, pp. 262-273, 1994.

     M Andersson, B Carstensen HH Storm: Mortality and cancer incidence
     after cerebral angiography. Radiation Research, 142, pp. 305-320,
     1995.

_S_e_e _A_l_s_o:

     'mortDK', 'gmortDK'

_E_x_a_m_p_l_e_s:

     data(thoro)
     str(thoro)

