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Table 2 Exposure measurements during the road test and in the clean room

From: Subclinical responses in healthy cyclists briefly exposed to traffic-related air pollution: an intervention study

Endpoint Road test Clean room p-value*
Average PM10, μg/m3 62.8 (23.6) 7.6 (3.3) <0.001
Average PM2.5, μg/m3 24.2 (8.7) 2.0 (0.78) <0.001
Average UFP, particles/cm3 28,867 (8479) 496 (138) <0.001
Duration of cycling, min 20.8 (1.6) 20.2 (1.9) 0.20
Temperature,°C 15.2 (1.6) 21.6 (1.0) <0.001
Relative humidity,% 57.0 (9.5) 45.7 (6.6) <0.001
Heart rate, beats/min 131 (15.0) 131 (14.6) 0.90
% of maximal heart rate 74.0% (8.6) 74.1% (8.8) 0.90
  1. Values are Mean (SD)
  2. *Paired t-test