Table 3– Correlations between clinical scores and polysomnographic respiratory parameters

	Apnoea hypopnoea index events·h⁻¹		Mean oxygen saturation %
	Pearson’s correlation	p-value	Pearson’s correlation	p-value
Sleep clinical score	0.216	0.001**	-0.096	0.102
Other alternative scores
Score 1	0.092	0.119	-0.077	0.189
Score 2	0.151	0.010*	-0.107	0.070
Score 3	0.131	0.026*	-0.074	0.213
Score 4	0.145	0.013*	-0.080	0.177
Score 5	-0.004	0.942	-0.035	0.559
Score 6	0.144	0.014*	-0.109	0.064

*: correlation is significant at the 0.05 level (two-tailed); **: correlation is significant at the 0.01 level (two-tailed).