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Table 3 Statistics for within-sample PM1.5 increases (see text for formal definition of the ‘increase’ variable)a

From: Within-microenvironment exposure to particulate matter and health effects in children with asthma: a pilot study utilizing real-time personal monitoring with GPS interface

Microenvironment Mean Min value 25th Quantile Median 75th Quantile Max value % at least 5 μg/m3 % at least 10 μg/m3
Home 24.0 0.0 1.6 7.4 19.4 282.1 56.8 40.8
Transit 17.6 0.0 1.0 5.3 14.5 269.9 50.4 38.4
School 10.1 0.0 1.3 3.2 11.4 137.3 40.8 27.2
  1. aStatistics were computed by exponentiating 1-min averaged logged concentrations, determining the increase amount within subject samples (subject, day and microenvironment), then computing composite statistics across the 125 samples. PM concentrations (micrograms per cubic meter) have been corrected by gravimetric filter mass collected concurrently with each daily pDR sample