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Table 3 Percent change in the number of Psychiatric Emergency Visits (PEVs) with their 95% Confidence Intervals for an increase of 10 μg/m3 in lag 0 in the air pollutant for Single and Multi-pollutant models during the warmer season (April to September)

From: The association between daily concentrations of air pollution and visits to a psychiatric emergency unit: a case-crossover study

  Model PM10 NO2 O3
Change PEVs (%) (95% CI) Change PEVs (%) (95% CI) Change PEVs (%) (95% CI)
Single Pollutant Crudeq 3.4 (0.3–6.6) -0.2 (−2.11.7) 0.7 (−0.3–1.7)
Single Pollutant Adjustedb 3.5 (0.4–6.8) 0.0 (0.981–1.019) 0.6 (−0.5–1.6)
Two-pollutants
 PM10 + NO2 Crude 3.6 (0.3–6.9) −0.5 (−2.4–1.4)  
 PM10 + NO2 Adjusted 3.6 (0.4–7.0) −0.4 (−2.3–1.6)  
 PM10 + O3 Crude 3.0 (0.7–5.4)   0.5 (−0.6–1.5)
 PM10 + O3 Adjusted 3.6 (0.4–7.0)   0.3 (−0.5–1.2)
 NO2 + O3 Crude   0.6 (−1.7–2.9) 0.9 (−0.3–2.1)
 NO2 + O3 Adjusted   0.7 (−1.3–2.7) 0.8–0.4-2.0)
Three-pollutants
 PM10 + NO2 + O3 Crude 3.2 (−0.2–6.8) −0.1 (−2.5–2.3) 0.4 (−0.9–1.7)
 PM10 + NO2 + O3 Adjusted 3.3 (−0.2–6.9) −0.1 (−2–5-2.4) 0.3 (−1.0–1.6)
  1. aModel with only air pollutants
  2. bAdjusted = Model adjusting for daily mean temperature (continuous) and public Swedish holiday (Yes/No)