The Indices of Instantaneous Pulse Rate Variability Are Indicators for Daily Life Quality Assessment in Patients with COPD

Table 5

Correlation between iPRV indices and each subquestion of CAT in phase B.

Variables	LF	HF	VHF	nLF^a	nHF^a	LF/HF	nLF^b	nHFb	nVHF^b
CAT1	−0.03	−0.06	−0.04	0.28	−0.28	0.28	0.24	−0.31	−0.01
CAT2	−0.03	−0.03	−0.04	0.16	−0.16	0.16	0.01	−0.27	0.13
CAT3	0.12	0.06	0.09	0.05	−0.05	0.05	0.14	−0.28	−0.11
CAT4	0.06	0.08	0.01	−0.01	0.01	−0.01	−0.11	0.30	−0.07
CAT5	−0.04	−0.04	0.00	0.20	−0.20	0.20	−0.04	−0.20	0.35
CAT6	−0.25	−0.35	−0.30	0.37	−0.37	0.37	0.36	−0.31	0.04
CAT7	−0.33	−0.41	−0.45	0.30	−0.30	0.30	0.30	−0.13	−0.08
CAT8	−0.29	−0.37	−0.41	0.32	−0.32	0.32	0.23	−0.15	−0.05

p-value< 0.05.