Exposure to mixtures of PM components and term premature rupture of membranes: a case-crossover study in Shijiazhuang, China.

This study aims to explore the acute effects of short-term exposure to PM components and their mixture on PROM. Counts of hospital admissions due to PROM were collected at the Fourth Hospital of Shijiazhuang. The associations between the PROM and PM components was examined using a time-stratified case-crossover approach.