Table 2 The improvements of respiratory status after short-term period of SEMS placement

Lumen diameter (mean ± SD, mm)

3.69 ± 1.35

8.23 ± 1.44 (< 0.001)

6.49 ± 1.54 (< 0.001)

Spirometry tests

 FEV₁ (mean ± SD, L)

2.09 ± 0.55

2.44 ± 0.67 (< 0.001)

NA

 FEV₁ (% predicted, mean ± SD)

67.04 ± 15.07

79.25 ± 19.52 (< 0.001)

NA

 FVC (mean ± SD, L)

2.53 ± 0.61

2.91 ± 0.72 (< 0.001)

NA

 FVC (% predicted, mean ± SD)

67.45 ± 13.68

76.96 ± 16.95 (< 0.001)

NA

 FEV₁/FVC (mean ± SD)

82.39 ± 8.72

83.56 ± 8.91 (0.199)

NA

Symptom

 mMRC scale (mean ± SD)

1.60 ± 0.61

0.26 ± 0.05 (< 0.001)

0.13 ± 0.34 (< 0.001)

 Cough (%)

25 (32.5)

41 (53.2) (0.009)

28 (36.4) (0.61)

 Pectoralgia (%)

23 (30.0)

32 (41.6) (0.13)

13 (16.9) (0.03)