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Table 2 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-pollutant, two-pollutant, and Multi-pollutant models

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 Crudea 2.1 (0.2–4.1) 0.3 (−0.9–1.4) 0.2 (−0.6–0.9)
Single Pollutant Adjustedb 2.3 (0.3–4.3) 0.3 (−0.8–1.5) 0.1 (−0.6–0.9)
Two-pollutants
 PM10 + NO2 Crude 2.0 (0.0–4.0) 0.5 (−0.8–1.7)  
 PM10 + NO2 Adjusted 2.2 (0.2–4.3) 0.5 (−0.8–1.7)  
 PM10 + O3 Crude 1.7 (−0.4–3.9)   0.3 (−0.5–1.1)
 PM10 + O3 Adjusted 1.9 (−0.03–4.1)   0.3 (−0.5–1.2)
 NO2 + O3 Crude   0.8 (−0.7–2.3) 0.4 (−0.5–1.4)
 NO2 + O3 Adjusted   0.8 (−0.7–2.4) 0.4 (−0.5–1.4)
Three-pollutants
 PM10 + NO2 + O3 Crude 1.4 (−0.8–3.7) 1.2 (−0.4–2.9) 0.7 (−0.3–1.8)
 PM10 + NO2 + O3 Adjusted 1.6 (−0.1–3.9) 1.2 (−0.5–2.9) 0.7 (−0.4–1.8)
  1. aModel with only air pollutants
  2. bAdjusted = Model adjusting for daily mean temperature (continuous) and public Swedish holiday (Yes/No)