polyps3                package:HSAUR                R Documentation

_F_a_m_i_l_i_a_l _A_n_d_e_n_o_m_a_t_o_u_s _P_o_l_y_p_o_s_i_s

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

     Data from a placebo-controlled trial of a non-steroidal
     anti-inflammatory drug in the treatment of familial andenomatous
     polyposis (FAP).

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

     data("polyps3")

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

     A data frame with 22 observations on the following 5 variables.

     '_s_e_x' a factor with levels 'female' and 'male'.

     '_t_r_e_a_t_m_e_n_t' a factor with levels 'placebo' and 'active'.

     '_b_a_s_e_l_i_n_e' the baseline number of polyps.

     '_a_g_e' the age of the patient.

     '_n_u_m_b_e_r_3_m' the number of polyps after three month.

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

     The data arise from the same study as the 'polyps' data. Here, 
     the number of polyps after three months are given.

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

     F. M. Giardiello, S. R. Hamilton, A. J. Krush, S. Piantadosi, L.
     M. Hylind, P. Celano, S. V. Booker, C. R. Robinson and G. J. A.
     Offerhaus (1993), Treatment of colonic and rectal adenomas with
     sulindac in familial adenomatous polyposis. _New England Journal
     of Medicine_, *328*(18), 1313-1316.

     S. Piantadosi (1997), _Clinical Trials: A Methodologic
     Perspective_. John Wiley & Sons, New York.

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

       data("polyps3", package = "HSAUR")
       plot(number3m ~ age, data = polyps3, pch = as.numeric(polyps3$treatment))
       legend("topright", legend = levels(polyps3$treatment), pch = 1:2, bty = "n")

