Table 2

Polysomnographic variables: comparison of patients with cystic fibrosis (symptomatic and asymptomatic) and controls

Polysomnographic variables
SubjectsApnoea + hypopnoea index
Apnoea indexMean Sao2Lowest Sao2Sleep time with Sao2 < 93Mean Sao2Mean Sao2Lowest Sao2Lowest Sao2
(NREM)(REM)(NREM)(REM)
(events/h)(events/h)(%)(%)(%)(%)(%)(%)(%)
Symptomatic2-151 (n = 7)4.2 (5.6)1.9 (2.8)94.1 (2.6)2-165 81.7 (5.7)2-160 10.1(12.2)2-165 94.7 (1.5)2-160 93.5 (1.9)88.5 (2.6)84.0 (4.7)
Asymptomatic2-151 (n = 12)4.6 (11.1)0.9 (1.2)96.5 (1.0)88.9 (6.6) 2.1 (4.1)96.0 (1.1)96.0 (1.4)87.4 (6.4)88.0 (8.4)
Total patients (n = 19)4.44 (9.3)1.3 (2.0)95.6 (2.1)2-160 85.9 (7.0)2-150 5.0 (8.5)2-150 95.4 (1.4)2-150 94.7 (2.0)87.8 (5.0)86.0 (6.7)
Controls (n = 20)4.9 (3.1)1.0 (0.7)96.9 (1.1)89.1 (5.2)1.0 (3.1)96.3 (0.9)95.0 (19.7)90.0 (4.8)88.2 (19.1)
  • Data expressed as mean (SD). Statistical analysis used two tailed t test.

  • 2-150 p < 0.05v controls;

  • 2-160 p < 0.001v controls;

  • 2-165 p < 0.0001v controls.

  • 2-151 Clinical condition at the moment of the test with or without symptoms of respiratory inflammation.