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Table 7 Paired comparison analysis of pulmonary function (FVC, FEV1, FEV1/FVC, and PEFR) in 46 adults in winter and summer

From: Correlation between indoor air pollution and adult respiratory health in Zunyi City in Southwest China: situation in two different seasons

Pulmonary function parameters

Asthma-like symptoms and asthma

Z

p value

Summer (n = 46)

Winter (n = 46)

FVC in litres (L)

3.5 (2.7–4.1)

2.9 (2.1–3.7)

−5.91a

< 0.001***

FEV1 in litres (L)

3.3 (2.4–3.8)

2.7 (1.8–3.5)

−5.91a

< 0.001***

FEV1/FVC in percentage

91.7 (87.7–94.0)

91.9 (82.0–94.6)

−2.91a

< 0.001***

PEFR in litres/min

382.8 (324.9–420.7)

347.9 (303.8–404.4)

−5.89a

< 0.001***

  1. aNonparametric test (Wilcoxon signed-rank test); *significant at p < 0.05; *significant at p < 0.05, **significant at p < 0.01, *** significant at p < 0.001