<prompt> tafadhali geuza maudhui haya ya swahili kwenda kwa kiingereza.hata hivyo, tangu kiasi cha kazi hadi sasa ni msalaba-sectional hiyo ni, vipimo ni kuchukuliwa tu kwa wakati mmoja katika maisha ya mtu, hatuwezi kujua kama watumiaji wa bangi ingekuwa kazi yoyote tofauti kabla ya kuanza kutumia bangi.  <response>: megjithatë, since much of the work to date is cross-sectional që është, measurements are taken only at one time in a persons life, we cannot know whether cannabis users would have performed any differently before they started using cannabis. 