Table 4.

HRV adjusted Lag0-4 cumulative effect of ST-height associated with 10 μg/m³ increment of PM_2.5.

ST Variable	Regression Coefficients (SE) and 95% CI
	Log-HF	95% CI	Log-LF	95%CI	SDNN	95% CI	RMSSD	95% CI
ST-I	0.31	(0.03,0.58)	0.31	(0.03,0.58)	0.29	(0.02,0.57)	0.31	(0.03,0.58)
ST-II	0.77	(0.24,1.30)	0.77	(0.24,1.30)	0.73	(0.20,1.26)	0.78	(0.25,1.31)
ST-III	0.47	(0.02,0.92)	0.47	(0.02,0.92)	0.45	(0.01,0.90)	0.48	(0.03,0.93)
ST-aVF	0.61	(0.14,1.08)	0.61	(0.14,1.08)	0.58	(0.11,1.05)	0.62	(0.15,1.10)
ST-V6	0.57	(0.07,1.08)	0.57	(0.07,1.08)	0.56	(0.05,1.06)	0.58	(0.07,1.08)

Adjusted for age, sex, race, temperature, relative humidity, diabetes, hypertension, CVD, and each of the HRV indices.