Montana               package:epicalc               R Documentation

_D_a_t_a_s_e_t _o_n _a_r_s_e_n_i_c _e_x_p_o_s_u_r_e _a_n_d _r_e_s_p_i_r_a_t_o_r_y _d_e_a_t_h_s

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

     Dataset from a cohort study of exposure to arsenic from industry
     and deaths from respiratory diseases.

_U_s_a_g_e:

     data(Montana)

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

     A data frame with 114 observations on the following 6 variables.

     '_r_e_s_p_d_e_a_t_h' a numeric vector indicating number of deaths from
          respiratory diseases

     '_p_e_r_s_o_n_y_r_s' a numeric vector indicating person-years of exposure

     '_a_g_e_g_r' a numeric vector: 1=40-49, 2=50-59, 3=60-69, 4=70-79")

     '_p_e_r_i_o_d' a numeric vector: 1=1938-1949, 2=1950-1959, 3=1960-1969,
          4=1970-1977

     '_s_t_a_r_t' a numeric vector indicating starting period: 1=pre-1925,
          2=1925 & after

     '_a_r_s_e_n_i_c' a numeric vector indicating years of exposure: 1=<1
          year, 2=1-4 years, 3=5-14 years, 4=15+ years 

