Relationship of meteorological factors and air pollutants with medical care utilization for gastroesophageal reflux disease in urban area

Figure 3 Time lag for exposure in multivariate analyses. A: Excess risk was significant after exposure up until 8 d for average temperature; B: Excess risk was significant after exposure up until 9 d for wind speed; C: Excess risk was significant after exposure up until 6 d for sunshine duration; D: Excess risk was significant after exposure up until 9 d for particulate matter with a diameter ≤ 2.5 µm; E: Excess risk was significant after exposure up until 9 d for carbon monoxide. ^aP < 0.05. CO: Carbon monoxide; PM_2.5: Particulate matter with a diameter ≤ 2.5 µm; ppm: Parts-per-million.