<prompt> Translate the following text to SwahiliFollowing the approach of the Section 812 Prospective Report, we estimated the percentage change in the prevalence rate for chronic bronchitis using the estimated coefficient from Schwartzs study in a C-R function, and then applied this percentage change to a baseline incidence rate obtained from another source.  <response>: Kwa mujibu wa ripoti ya Section 812 ya Prospective, asilimia ya mabadiliko katika kiwango cha kuenea kwa bronchitis ya muda mrefu ilikadiriwa kwa kutumia coefficient ya Schwartz ya utafiti katika kazi ya C-R, na kisha kutumika kwa kiwango cha msingi cha matukio ya msingi iliyopatikana kutoka chanzo kingine. 