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Table 3 The pulmonary function parameters at baseline, before and after of shift-work (n = 305)

From: Evaluation of pulmonary function among detergent powder factory workers- a cross sectional study in Semnan, Iran

Pulmonary function Parameters (%) Baseline (Predicted) Before shift After shift Total Changes (%) (Mean ± SD) P value*
FVC 96.80 98.00 96.40 1.7 ± 7.75 < 0.001
FEV1 95.85 94.95 92.80 2.2 ± 7.96 < 0.001
FEV1/FVC 82.25 90.95 90.30 0.62 ± 5.20 0.038
PEF 99.15 100.15 99.20 0.97 ± 11.20 0.13
FEF (25–75%) 86.60 91.40 83.20 8.24 ± 19.50 < 0.001
  1. FVC forced vital capacity, FEV1 forced expiratory volume, PEF peak expiratory flow, FEF (25–75) forced expiratory flow at 25 and 75% of the pulmonary volume. Values are the mean ± standard deviation
  2. *Paired t-test and ANOVA