Statistical significance of interaction between risk profile and RDI in multivariable analysis for all-cause and cause-specific mortality.

For overall mortality (n=382)
RDI category	P values of interaction (RDI*risk group)
RDI< 45% vs. RDI≥ 45%	0.009
RDI< 50% vs. RDI≥ 50%	0.04
RDI< 55% vs. RDI≥ 55%	0.07
RDI< 60% vs. RDI≥ 60%	0.14
RDI< 65% vs. RDI≥ 65%	0.11
RDI< 70% vs. RDI≥ 70%	0.14
RDI< 75% vs. RDI≥ 75%	0.06
RDI< 80% vs. RDI≥ 80%	0.07
For cause-specific mortality (n=369)
RDI category	P values of interaction (RDI*risk group)
RDI< 45% vs. RDI≥ 45%	0.03
RDI< 50% vs. RDI≥ 50%	0.03
RDI< 55% vs. RDI≥ 55%	0.04
RDI< 60% vs. RDI≥ 60%	0.03
RDI< 65% vs. RDI≥ 65%	0.08
RDI< 70% vs. RDI≥ 70%	0.23
RDI< 75% vs. RDI≥ 75%	0.17
RDI< 80% vs. RDI> 80%	0.09