Skip to main content

Table 3 Season-adjusted calibration factors for personal PM 2.5 of ambient origin and total personal PM 2.5

From: Exposure measurement error in PM2.5 health effects studies: A pooled analysis of eight personal exposure validation studies

 

Monitor PM2.5

Model predicted PM2.5

Personal PM 2.5 of ambient

5 cities (141 subjects)

origin

  

Estimate (95% CI)a

0.31 (0.14, 0.47)**

0.54 (0.42, 0.65)**

p-value for between-city

0.0034

0.1114

heterogeneity

  

R I b

10.75%

0.96%

Estimate (95% CI)c

N/A

0.56 (0.44, 0.68)**

Total Personal PM 2.5

9 cities (490 subjects)

Estimate (95% CI)a

0.56 (0.24, 0.88)**

0.81 (0.49, 1.12)

p-value for between-city

0.0084

0.1712

heterogeneity

  

R I b

2.54%

1.28%

Estimate (95% CI)c

N/A

0.79 (0.54, 1.04)**

  1. *p-value1 < 0.05, **p-value1 < 0.01 for significant difference from 1.
  2. aResults from Model 1 (including random slopes for cities, g 3i ).
  3. bR I : the proportion of variance explained by the between-cities heterogeneity.
  4. cResults from Model 2, when no significant between-city heterogeneity was detected (without the random slopes for cities, g 3i ).
Back to article page

Environmental Health

ISSN: 1476-069X