<prompt> Translate the following text to EnglishKwa mujibu wa utafiti uliochapishwa, kuna uhusiano wa msingi lakini sio muhimu na viwango vya PM vitu vilivyotupwa na viwango vya PM vitu vilivyotupwa.  <response>: While most of the published studies found positive but not always significant associations with available PM indices such as total suspended particles TSP, fine particles components i.e. 