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Table 4 The improvements of respiratory status after long-term period of SEMS placement

From: Post-tuberculosis tracheobronchial stenosis: long-term follow-up after self-expandable metallic stents placement and development of a prediction score—the Restenosis Score

Respiratory status

Restenosis group

Non-restenosis group

Pre-stenting

10 years after stenting

P value

Pre-stenting

10 years after stenting

P value

Lumen diameter (mean ± SD, mm)

NA

NA

NA

3.51 ± 1.42

6.29 ± 1.10

< 0.001

Spirometry tests

 FEV1 (mean ± SD, L)

2.08 ± 0.57

2.42 ± 0.44

< 0.001

2.09 ± 0.54

2.68 ± 0.58

< 0.001

 FEV1 (% predicted, mean ± SD)

65.51 ± 13.00

76.48 ± 7.14

< 0.001

69.83 ± 13.10

88.33 ± 7.96

< 0.001

 FVC (mean ± SD, L)

2.51 ± 0.68

3.02 ± 0.59

< 0.001

2.55 ± 0.57

3.29 ± 0.71

< 0.001

 FVC (% predicted, mean ± SD)

63.51 ± 11.69

77.11 ± 6.06

< 0.001

69.83 ± 14.34

88.24 ± 8.08

< 0.001

Symptom

 mMRC scale (mean ± SD)

1.66 ± 0. 61

1.78 ± 1. 01

0.43

1.56 ± 0.62

0.07 ± 0.25

< 0.001

 Cough (%)

7 (24.1)

10 (34.5)

0.224

18 (37.5)

10 (20.8)

0.084

 Pectoralgia (%)

7 (24.1)

1 (3.4)

0.033

16 (33.3)

0 (0.0)

< 0.001

  1. FEV1 forced expiratory volume in one second; FVC forced vital capacity; mMRC modified Medical Research Council; NA not applicable