Table 2. PAP adherence of pre-I and post-I patients according to time

Time	Pre-I (n=26)	Post-I (n=168)	Source	p-value
1 month	73±23	67±30	Time	<0.001*
3 month	71±27	64±36	Group	0.338
6 month	53±37	46±39	Time×group	0.895
9 month	44±37	41±40
Mean	59±25	47±12

Values are presented as mean±SD. PAP adherence was presented as percentage of days used for at least 4 hours of the night.
p<0.05: significant effect by 2-way repeated measures analysis of variance.
PAP: positive airway pressure, Pre-I: pre-insurance, Post-I, post-insurance.