docs: def _import_dich_vals(self):
          """
          Import simple dichotomous values.
  
          Dichotomous values are found on one line, therefore one regex will
          return up to three possible matches for the Chi^2, degrees of freedom,
          and p-value.
          """
          m = re.search(
              r"Chi\^2 = ({0}|\w+) +d.f. = +({0}|\w+) +P-value = +({0}|\w+)".format(
                  self.re_num
              ),  # noqa
              self.output_text,
          )
          cw = {1: "Chi2", 2: "df", 3: "p_value4"}
          for val in cw:
              try:
                  self.output[cw[val]] = float(m.group(val))
              except:
                  self.output[cw[val]] = -999