downer                 package:alr3                 R Documentation

_D_o_w_n_e_r _d_a_t_a

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

     For unknown reasons, some dairy cows become recumbant-they lay
     down.  This condition can be serious, and may lead to death of the
     cow.  These data are from a study of blood samples of over 500
     cows studied at the Ruakura (N.Z.) Animal Health Laboratory during
     1983-84.  A variety of blood tests were performed, and for many of
     the animals the outcome (survived, died, or animal was killed) was
     determined.  The goal is to see if survival can be predicted from
     the blood measurements. Case numbers 12607 and 11630 were noted as
     having exceptional care-and they survived.

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

     This data frame contains the following columns:

     _C_a_l_v_i_n_g 0 if measured before calving, 1 if after

     _D_a_y_s_r_e_c Days recumbent

     _C_K Serum creatine phosphokinase (U/l at 30C)

     _A_S_T serum asparate amino transferase (U/l at 30C)

     _U_r_e_a serum urea (mmol/l)

     _P_C_V Packed Cell Volume (Haemactocrit), 

     _I_n_f_l_a_m_a_t inflamation 0=no, 1=yes

     _M_y_o_p_a_t_h_y Muscle disorder, 1 if present, 0 if absent

     _O_u_t_c_o_m_e outcome:  1 if survived, 0 if died or killed

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

     Clark, R. G., Henderson, H. V., Hoggard, G. K. Ellison, R. S. and
     Young, B. J. (1987).  The abiltiy of biochemical and haematolgical
     tests to predict recovery in periparturient recumbent cows. _NZ
     Veterinary Journal_, 35, 126-133.

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

     Weisberg, S. (2005). _Applied Linear Regression_, 3rd edition. New
     York: Wiley, Problem 12.1.

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

     data(downer)

