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. 2018 Apr 26;2018:3860921. doi: 10.1155/2018/3860921

Table 4.

The results of healthy participants' spirometry tests.

Lung function index Measured lung function
(mean ± SD)		 Predicted lung function (%)
FVC∗  (Lit) 2.60 (±0.47) 88.27 (2.41)
FEV1†  (Lit) 2.10 (±0.51) 89.41 (1.05)
FEF25–75%‡  (Lit/S) 3.33 (±0.55) 106.64 (3.71)
FEV1/FVC 91.41 (±3.64) 112.87 (5.89)

∗FVC, forced vital capacity; †FEV1, forced expiratory volume in 1 second; ‡FEF25–75%, maximum mid-expiratory flow or forced expiratory flow 25–75%. All four spirometry indices were measured as liter (Lit), except for forced expiratory flow (FEF) that was measured as liter per second (Lit/S) and represented as mean (±SD).