NMRK2 and periodontitis: Specifically, the impacts of log-transformed MCNP, MCOP, MECPP, MnBP, MCPP, MEHHP, MiBP, MEOHP, and MBzP on periodontitis were uniform across these subgroups, as indicated by non-significant interaction terms (all P for interaction > 0.05), detailed in Supplementary Fig. 1.