The trial length is the length of the whole study: the length of the interventional phase (in this case, six months) plus the length of the non-interventional phase (s) (the time periods being used for comparison data).
Oge arụ ọrụ nke ngwaọrụ mkpanaka (gụnyere laptọọpụ) dabere na ihe abụọ: ogo nke batrị (zuru ezu ebubo; ọ bụrụ na ọ nọghị ala) na ọkwa ọkwa nke ngwaọrụ n'oge ọrụ.