Hospital                 package:vcd                 R Documentation

_H_o_s_p_i_t_a_l _d_a_t_a

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

     The table relates the length of stay (in years) of 132 long-term
     schizophrenic patients in two London mental hospitals with the
     frequency of visits.

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

     data("Hospital")

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

     A 2-dimensional array resulting from cross-tabulating  132
     patients.  The variables and their levels are as follows:

       No  Name             Levels
        1  Visit Frequency  Regular, Less than monthly, Never
        2  Length of Stay   2-9 years, 10-19 years, 20+ years

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

     Wing (1962) who collected this data concludes  that the longer the
     length of stay in hospital, the less frequent the visits.

     Haberman (1974) notes that this pattern does not increase from the
     "Less than monthly" to the "Never" group, which are homogeneous.

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

     S.J Haberman (1974): Log-linear models for frequency tables with
     ordered classifications. Biometrics, 30:689-700.

_R_e_f_e_r_e_n_c_e_s:

     J.K. Wing (1962): Institutionalism in mental hospitals. British
     Journal of Social Clinical Psychology, 1:38-51.

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

     data("Hospital")

     mosaic(t(Hospital), shade = TRUE)
     mosaic(Hospital, shade = TRUE)
     sieve(Hospital, shade = TRUE)
     assoc(Hospital, shade = TRUE)

