Table 6

Oxygen saturation, haemoglobin concentration and mean pulmonary artery pressure at 6 months and intensity/history of smoking

Smoking intensity/smoking history	n	SpO₂	Hb (g/dl)	PAPm (mm Hg)
Mild	33	84.8±1.7	16.3±1.6	22.5±3.6
Moderate	82	84.2±2.2	16.5±1.7	22.8±4.4
Heavy	67	83.1±2.5^*	17.2±2.1^‡	24.2±5.2^¶
Short term	41	85.2±2.4	16.6±1.6	22.1±3.5
Medium term	65	84.7±1.6	17.2±1.8	22.5±4.5
Long term	76	84.2±2.1^†	18.1±2.3^§	24.0±5.7^**

Data are presented as mean±SD.
↵* Heavy levels of smoking versus moderate (p=0.002) and mild levels of smoking (p<0.001).
↵† Long-term smoking versus medium-term (p=0.009) and short-term smoking (p<0.001).
↵‡ Heavy levels of smoking versus moderate (p=0.036) and mild levels of smoking (p<0.001).
↵§ Long-term smoking versus medium-term (p=0.008) and short-term smoking (p<0.001).
↵¶ Heavy levels of smoking versus moderate (p=0.048) and mild levels of smoking (p=0.040).
↵** Long-term smoking versus medium-term (p=0.057) and short-term smoking (p=0.044).
Hb, haemoglobin concentration; PAPm, mean pulmonary artery pressure; SpO₂, arterial oxygen saturation.