metacum                 package:meta                 R Documentation

_C_u_m_u_l_a_t_i_v_e _m_e_t_a-_a_n_a_l_y_s_i_s

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

     Performs a cumulative meta-analysis.

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

     metacum(x, pooled="fixed", sortvar)

_A_r_g_u_m_e_n_t_s:

       x: An object of class 'meta'.

  pooled: A character string indicating whether a fixed or random
          effects model is used for pooling. Either '"fixed"' or
          '"random"', can be abbreviated.

 sortvar: An optional vector used to sort the individual studies (must
          be of same length as 'x$TE').

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

     A cumulative meta-analysis is performed. Studies are included
     sequentially as defined by 'sortvar'.

_V_a_l_u_e:

     An object of class 'c("metacum", "meta")' with corresponding
     'print', 'plot' function. The object is a list containing the
     following components: 

TE, seTE: Estimated treatment effect and standard error of pooled
          estimate in cumulative meta-analyses.

 studlab: Study label describing addition of studies.

      sm: Summary measure.

  method: Method used for pooling.

       k: Number of studies combined in meta-analysis.

  pooled: As defined above.

_A_u_t_h_o_r(_s):

     Guido Schwarzer sc@imbi.uni-freiburg.de

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

     Cooper H & Hedges LV (1994), _The Handbook of Research Synthesis_.
     Newbury Park, CA: Russell Sage Foundation.

_S_e_e _A_l_s_o:

     'metabin', 'metacont', 'print.meta'

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

     data(Fleiss93)
     meta1 <- metabin(event.e, n.e, event.c, n.c,
                      data=Fleiss93, studlab=study,
                      sm="RR", meth="I")
     meta1

     metacum(meta1)
     metacum(meta1, pooled="random")
     plot(metacum(meta1, pooled="random"))

