Table 2. Percent increase in number of daily outpatient visits for arrhythmia associated with a 10-µg/m³ increase in pollutant concentrations using different lag days in single-pollutant models.

Lag	PM10	SO2	NO2
0	0.56 (0.42, 0.70)	2.07 (1.49, 2.64)	2.90 (2.53, 3.27)
1	−0.11 (−0.25, 0.03)	0.53 (0.01, 1.07)	1.10 (0.72, 1.48)
2	−0.01 (−0.15, 0.13)	0.23 (−0.29, 0.75)	0.14 (−0.24, 0.51)
02	0.18 (0.01, 0.35)	1.27 (0.59, 1.95)	2.27 (1.80, 2.74)

Values are reported as means and 95% confidence intervals.

Abbreviations: Lag day 02, 3 day-moving average concentrations.