nickel                  package:Epi                  R Documentation

_A _C_o_h_o_r_t _o_f _N_i_c_k_e_l _S_m_e_l_t_e_r_s _i_n _S_o_u_t_h _W_a_l_e_s

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

     The 'nickel' data frame has 679 rows and 7 columns. The data
     concern a cohort of nickel smelting workers in South Wales and are
     taken from Breslow and Day, Volume 2. For comparison purposes,
     England and Wales mortality rates (per 1,000,000 per annum) from
     lung cancer (ICDs 162 and 163), nasal cancer (ICD 160), and all
     causes, by age group and calendar period, are supplied in the
     dataset 'ewrates'.

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

     This data frame contains the following columns:

             'id':  Subject identifier (numeric)
            'icd':  ICD cause of death if dead, 0 otherwise (numeric)
       'exposure':  Exposure index for workplace (numeric)
            'dob':  Date of birth (numeric)
         'age1st':  Age at first exposure (numeric)
          'agein':  Age at start of follow-up (numeric)
         'ageout':  Age at end of follow-up (numeric)

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

     Breslow NE, and Day N, Statistical Methods in Cancer Research.
     Volume II: The Design and Analysis of Cohort Studies. IARC
     Scientific Publications, IARC:Lyon, 1987.

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

     data(nickel)
     str(nickel)

