Table 5

Polysomnographic data

PAH+ (n=12)PAH– (n=32)p value
AI (n/h)42.6 (26.3)35.8 (21.7)NS
AHI (n/h)53.4 (25)43.3 (22.9)NS
Mean apnoea duration (s)22.9 (5.6)23.3 (5.6)NS
% TST-Sao 2 <90%80.3 (26.8)47.4 (33)0.003
% TST-Sao 2<80%32.2 (28.5)10.7 (18.8)0.005
Sat min (%)56.2 (18.6)71.2 (14.2)0.006
Sat max (%)92.7 (1.7)94.4 (2.3)0.02
  • AI = apnoea index; AHI = apnoea-hypopnoea index; % TST-Sao 2 <90% = percentage of total sleep time spent at Sao 2 less than 90%; % TST-Sao 2 <80% = percentage of total sleep time spent at Sao 2 less than 80%; Sat min = minimal saturation; Sat max = night onset maximal saturation; PAH = pulmonary arterial hypertension.