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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