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Table 3 Pulmonary function measures of the study subjects during and post-exposure in transport hub and park

From: Acute effects on pulmonary function in young healthy adults exposed to traffic-related air pollution in semi-closed transport hub in Beijing

Time points FEV1 (L) PEF (L/min)
Transport hub Park Transport hub Park
N Mean ± SD N Mean ± SD N Mean ± SD N Mean ± SD
Pre-exposure 40 3.16 ± 0.68 40 3.13 ± 0.64 40 451.03 ± 130.55 40 448.55 ± 120.49
During exposure 1 h 40 3.05 ± 0.64 40 3.12 ± 0.64 40 430.68 ± 126.26 40 439.98 ± 120.82
During exposure 2 h 40 3.02 ± 0.65 40 3.08 ± 0.65 40 427.15 ± 127.27 40 437.76 ± 122.20
Post-exposure 5 h 39 3.10 ± 0.61 40 3.09 ± 0.62 39 438.78 ± 121.29 40 440.57 ± 120.33
Post-exposure 7 h 38 3.09 ± 0.65 40 3.10 ± 0.64 38 443.68 ± 119.36 40 447.65 ± 125.15
Post-exposure 9 h 38 3.12 ± 0.65 40 3.09 ± 0.67 38 437.39 ± 116.07 40 439.50 ± 120.93
Post-exposure 22 h 38 3.09 ± 0.63 40 3.11 ± 0.68 38 436.42 ± 120.24 40 438.32 ± 124.40
  1. SD standard deviation