Table 2 Expected outcomes associated with severe OSAHS after 14 years of treatment with CPAP or no treatment

Outcome	Probability after 14 years following:
Outcome	No treatment	CPAP
Survival	0.57 (0.49 to 0.65)	0.72 (0.66 to 0.78)
Cardiovascular event	0.35 (0.20 to 0.53)	0.19 (0.09 to 0.27)
Stroke	0.39 (0.23 to 0.60)	0.20 (0.08 to 0.31)
RTA	0.24 (0.21 to 0.28)	0.17 (0.14 to 0.19)
Event-free survival	0.30 (0.13 to 0.46)	0.58 (0.47 to 0.70)
QALYs	7.22 (6.48 to 7.93)	8.09 (7.17 to 8.44)

95% confidence intervals are shown in parentheses.
CPAP, continuous positive airway pressure; OSAHS, obstructive sleep apnoea/hypopnoea syndrome; RTA, road traffic accident; QALY, quality-adjusted life year.