bnd_mulcov_table#

View page source

The Covariate and Multiplier Bound Table#

bnd_mulcov_id#

This column has type integer and is the primary key for this table. Its initial value is zero, and it increments by one for each row. The bnd_mulcov_id column is also a foreign key for the mulcov_table ; i.e.,

mulcov_id = bnd_mulcov_id

In addition, the size of both tables is the same.

max_cov_diff#

This column has type real and contains the maximum absolute difference of the covariate minus its reference (for this covariate multiplier).

  1. This maximum is restricted to the data table covariate values that have data_id in the data_subset table.

  2. This maximum is further restricted to the covariate column corresponding to the covariate_id for this covariate multiplier.

  3. If the mulcov_type for this multiplier is rate_value , integrand_id for this multiplier is null and the maximum is respect to all integrands.

  4. If the mulcov_type for this multiplier is not rate_value , integrand_id for this multiplier is not null and the maximum is further restricted the that integrand.

If this value is zero, the corresponding covariate multiplier does not affect the model value for any of the data included during a fit.

max_mulcov#

This column has type real , is non-negative. The value max_mulcov is a maximum for the upper limit for the corresponding covariate multiplier during optimization. The value - max_mulcov is a minimum for the lower limit for the corresponding covariate multiplier during optimization. This maximum and minimum are in addition to the priors for the multiplier. If max_mulcov is null, it is interpreted as plus infinity and has no effect. Also, in the special case where the prior upper and lower limits are equal, this maximum and minimum are ignored (have no effect).