schizophrenia             package:HSAUR             R Documentation

_A_g_e _o_f _O_n_s_e_t _o_f _S_c_h_i_z_o_p_h_r_e_n_i_a _D_a_t_a

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

     Data on sex differences in the age of onset of schizophrenia.

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

     data("schizophrenia")

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

     A data frame with 251 observations on the following 2 variables.

     '_a_g_e' age at the time of diagnosis.

     '_g_e_n_d_e_r' a factor with levels 'female' and 'male'

_D_e_t_a_i_l_s:

     A sex difference in the age of onset of schizophrenia was noted by
     Kraepelin (1919). Subsequently epidemiological studies of the
     disorder have consistently shown an earlier onset in men  than in
     women. One model that has been suggested to explain this observed
     difference is know as the subtype model which postulates two type
     of schizophrenia, one characterised by early onset, typical
     symptoms and poor premorbid competence, and the other by late
     onset, atypical symptoms, and good premorbid competence. The early
     onset type is assumed to be largely a disorder of men   and the
     late onset largely a disorder of women.

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

     E. Kraepelin (1919), _Dementia Praecox and Paraphrenia_.
     Livingstone, Edinburgh.

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

       data("schizophrenia", package = "HSAUR")
       boxplot(age ~ gender, data = schizophrenia)

