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Table 1 Anthropometric spirometric characteristics of the studied subjects [mean ± SD and (minimal–maximal values)]

From: Machine learning associated with respiratory oscillometry: a computer-aided diagnosis system for the detection of respiratory abnormalities in systemic sclerosis

  Control
(1)
(n = 30)
Normal to the exam
(2)
(n = 22)
Altered to the exam
(3)
(n = 30)
 
Age (years) 49.7 ± 13.5
(27–78)
49.6 ± 14.5
(15–78)
46.1 ± 12.8
(21–68)
ns
Body mass (kg) 59.2 ± 68.7
(43.6–77.0)
60.8 ± 11.9
(34.6–88.4)
59.9 ± 13.1
(36.0–88.4)
ns
Height (m) 1.6 ± 5.3
(1.5–1.7)
1.6 ± 3.4
(1.5–1.7)
1.6 ± 6.3
(1.5–1.8)
ns
BMI (kg/m2) 23.5 ± 2.9
(18.7–28.6)
24.8 ± 3.9
(16.2–32.5)
24.1 ± 4.3
(16.0–32.8)
ns
Male/female 1/29 1/21 1/29
FVC (L) 3.4 ± 0.7 2.8 ± 0.7 2.0 ± 0.5 1–2–3–1
FVC (%) 111.9 ± 18.5 96.7 ± 12.5 64.3 ± 11.6 1–2–3–1
FEV1 (L) 2.8 ± 0.6 2.4 ± 0.6 1.7 ± 0.5 1–2–3–1
FEV1 (%) 112.5 ± 18.2 97.1 ± 11.6 66.4 ± 12.1 1–2–3–1
FEV1/FVC 92.5 ± 10.4 83.4 ± 4.0 86.6 ± 5.5 1–2.3–1
FEF25–75% (L) 3.6 ± 1.0 3.0 ± 0.9 2.5 ± 0.9 1.2–3–1
FEF25–75% (%) 117.4 ± 37.4 112.9 ± 27.2 88.6 ± 28.4 1.2–3–1
FEF/FVC 98.6 ± 28.1 110.0 ± 23.4 134.4 ± 47.8 1.2.3–1
  1. The last column describes the comparisons between groups, in which the dot means non-significant change, while the dash means significant change
  2. FVC: forced vital capacity; FEV1: forced expiratory volume in the first second; FEF25–75%: forced expiratory flow between 25 and 75%; Ns: not significant; %: percentile of the predicted values