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. Author manuscript; available in PMC: 2013 Sep 4.
Published in final edited form as: Paediatr Perinat Epidemiol. 2010 Sep;24(5):492–501. doi: 10.1111/j.1365-3016.2010.01136.x

Table 5.

Unadjusted values of respiratory efforts (FVC, FEV1, FEV05) and the quartiles of prenatal PM2.5 level

FVC n mean SD P-level
PM2.5 level (quartiles)
< 20.95 µg/m3 43 1133.9 177.0
20.95 – 32.42 µg/m3 44 1182.6 213.9 z for trend = − 2.07
P = 0.039
32.43 – 52.6 µg/m3 44 1106.5 206.6
> 52.6 µg/m3 45 1077.7 165.9
Total 176 1124.8 194.1
FEV1
PM2.5 level (quartiles)
< 20.95 µg/m3 43 1084.0 172.5
20.95 – 32.42 µg/m3 44 1108.2 189.1 z for trend = − 2.07
P = 0.039
32.43 – 52.6 µg/m3 44 1062.0 202.1
> 52.6 µg/m3 45 1030.5 166.6
Total 176 1070.9 183.8
FEV05
PM2.5 level (quartiles)
< 20.95 µg/m3 43 861.0 165.5
20.95 – 32.42 µg/m3 44 858.7 156.6 z for trend = − 1.72
P = 0.086
32.43 – 52.6 µg/m3 44 836.8 186.0
> 52.6 µg/m3 45 816.8 165.0
Total 176 843.1 168.1