<prompt> Translate the following text to SwahiliAlthough there is considerable variation in the analytical designs and data used in the 26 underlying studies, the majority of the studies involve the value of risks to a middle-aged working population.  <response>: Ingawa kuna tofauti kubwa katika miundo ya uchambuzi na data kutumika katika masomo 26 msingi, wengi wa masomo kuhusisha thamani ya hatari kwa idadi ya watu wa umri wa kati kazi. 