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Table 1 Patients' characteristics and respiratory findings (n = 25)

From: Six minute walking distance in kyphoscoliosis patients with chronic respiratory failureTest del cammino di 6 minuti in pazienti con cifoscoliosi ed insufficienza respiratoria cronica

Variables

Median (inter quartile ratio)

Age, year

51 (44 to 58)

Gender, male/female

17/8

Body mass index, kg/m2

29 (23 to 31)

HMV duration, year

3 (1.5 to 4.0)

IPAP, cm H2O

18 (12.0 to 21.0)

EPAP, cm H2O

6 (5.0 to 6.0)

LTOT, n (%)

18 (72)

FEV1, L

0.73 (0.7 to 0.85)

FEV1, % predicted

28.0 (25.0 to 34.0)

FVC, L

0.87 (0.72 to 0.95)

FVC, % predicted

27.0 (24.0 to 34.0)

FEV1/FVC, %

84.0 (76.0 to 90.5)

Pathologic lung HRCT, n (%)

19 (76)

PaO2/FiO2, mm Hg

283.3 (256.8 to 316.4)

PaO2, mm Hg

60.0 (54.3 to 67.6)

pH

7.39 (7.37 to 7.42)

PaCO2, mm Hg

51.0 (46.5 to 57.8)

HCO3, mmol/L

30.2 (27.4 to 33.0)

SaO2,%

91.0 (87.4 to 93.9)

Systolic PAP > 40 mm Hg, n (%)

6 (24)

  1. Definition of abbreviations: EPAP, expiratory positive airway pressure; FEV1, forced expiratory volume in one second; FVC, forced vital capacity; HCO3, bi-carbonate; HMV, home mechanical ventilation; HRCT, high resolution computerized tomography; IPAP, inspiratory positive airway pressure; LTOT, long term oxygen therapy; PaO2/FiO2, partial arterial oxygen pressure over fractionated inspired oxygen; PaCO2, partial arterial carbon dioxide pressure; PAP, pulmonary arterial pressure; SaO2%, arterial blood oxygen saturation rate.