Table 3.

The interaction between air pollutants on BMD T-score using generalized linear model.

Air Pollutants	Interaction
	Unstandardized Coefficient β (95% CI)	p
CO $\times$ SO2	−0.041 (−0.229, 0.147)	0.670
CO $\times$ NO	−0.036 (−0.097, 0.025)	0.251
CO $\times$ NO2	−0.004 (−0.055, 0.047)	0.880
CO $\times$ NOx	−0.026 (−0.043, −0.010)	0.001
SO2 $\times$ NO	0.006 (−0.008, 0.021)	0.385
SO2 $\times$ NO2	−0.007 (−0.012, −0.002)	0.004
SO2 $\times$ NOx	−0.002 (−0.005, 0.001)	0.181
NO $\times$ NO2	0.002 (−0.003, 0.006)	0.447
NO $\times$ NOx	0.000 (−0.002, 0.002)	0.795
NO2 $\times$ NOx	0.001 (0.000, 0.002)	0.146

Values expressed as unstandardized coefficient β and 95% confidence interval (CI). Abbreviations are the same as in Table 1.